diff --git a/gcc/rust/checks/errors/feature/rust-feature-gate.cc b/gcc/rust/checks/errors/feature/rust-feature-gate.cc
index b2a6b6c64812..448fa18f21d4 100644
--- a/gcc/rust/checks/errors/feature/rust-feature-gate.cc
+++ b/gcc/rust/checks/errors/feature/rust-feature-gate.cc
@@ -146,6 +146,24 @@ FeatureGate::check_may_dangle_attribute (
     }
 }
 
+void
+FeatureGate::check_lang_item_attribute (
+  const std::vector<AST::Attribute> &attributes)
+{
+  for (const AST::Attribute &attr : attributes)
+    {
+      const auto &str_path = attr.get_path ().as_string ();
+      bool is_lang_item = str_path == Values::Attributes::LANG
+			  && attr.has_attr_input ()
+			  && attr.get_attr_input ().get_attr_input_type ()
+			       == AST::AttrInput::AttrInputType::LITERAL;
+
+      if (is_lang_item)
+	gate (Feature::Name::LANG_ITEMS, attr.get_locus (),
+	      "lang items are subject to change");
+    }
+}
+
 void
 FeatureGate::visit (AST::MacroRulesDefinition &rules_def)
 {
@@ -158,6 +176,8 @@ FeatureGate::visit (AST::Function &function)
   if (!function.is_external ())
     check_rustc_attri (function.get_outer_attrs ());
 
+  check_lang_item_attribute (function.get_outer_attrs ());
+
   AST::DefaultASTVisitor::visit (function);
 }
 
@@ -186,6 +206,7 @@ FeatureGate::visit (AST::Trait &trait)
   if (trait.is_auto ())
     gate (Feature::Name::OPTIN_BUILTIN_TRAITS, trait.get_locus (),
 	  "auto traits are experimental and possibly buggy");
+  check_lang_item_attribute (trait.get_outer_attrs ());
   AST::DefaultASTVisitor::visit (trait);
 }
 
@@ -243,4 +264,32 @@ FeatureGate::visit (AST::UseTreeGlob &use)
   // #[feature(prelude_import)]
 }
 
+void
+FeatureGate::visit (AST::StructStruct &struct_item)
+{
+  check_lang_item_attribute (struct_item.get_outer_attrs ());
+  AST::DefaultASTVisitor::visit (struct_item);
+}
+
+void
+FeatureGate::visit (AST::TraitItemType &trait_item_type)
+{
+  check_lang_item_attribute (trait_item_type.get_outer_attrs ());
+  AST::DefaultASTVisitor::visit (trait_item_type);
+}
+
+void
+FeatureGate::visit (AST::Enum &enum_item)
+{
+  check_lang_item_attribute (enum_item.get_outer_attrs ());
+  AST::DefaultASTVisitor::visit (enum_item);
+}
+
+void
+FeatureGate::visit (AST::EnumItem &enum_variant)
+{
+  check_lang_item_attribute (enum_variant.get_outer_attrs ());
+  AST::DefaultASTVisitor::visit (enum_variant);
+}
+
 } // namespace Rust
diff --git a/gcc/rust/checks/errors/feature/rust-feature-gate.h b/gcc/rust/checks/errors/feature/rust-feature-gate.h
index f1011e532245..c8ab66b753db 100644
--- a/gcc/rust/checks/errors/feature/rust-feature-gate.h
+++ b/gcc/rust/checks/errors/feature/rust-feature-gate.h
@@ -47,12 +47,18 @@ class FeatureGate : public AST::DefaultASTVisitor
   void visit (AST::ExternBlock &block) override;
   void visit (AST::MacroRulesDefinition &rules_def) override;
   void visit (AST::RangePattern &pattern) override;
+  void visit (AST::StructStruct &struct_item) override;
+  void visit (AST::TraitItemType &trait_item_type) override;
+  void visit (AST::Enum &enum_item) override;
+  void visit (AST::EnumItem &enum_variant) override;
 
 private:
   void gate (Feature::Name name, location_t loc, const std::string &error_msg);
   void check_rustc_attri (const std::vector<AST::Attribute> &attributes);
   void
   check_may_dangle_attribute (const std::vector<AST::Attribute> &attributes);
+  void
+  check_lang_item_attribute (const std::vector<AST::Attribute> &attributes);
   std::set<Feature::Name> valid_features;
 };
 } // namespace Rust
diff --git a/gcc/testsuite/rust/borrowck/reference.rs b/gcc/testsuite/rust/borrowck/reference.rs
index c4b9f7d9d890..1bef9388a1df 100644
--- a/gcc/testsuite/rust/borrowck/reference.rs
+++ b/gcc/testsuite/rust/borrowck/reference.rs
@@ -1,6 +1,7 @@
 // { dg-additional-options "-frust-compile-until=compilation -frust-borrowcheck -fdiagnostics-show-caret -fdiagnostics-show-line-numbers" }
 // { dg-enable-nn-line-numbers "" }
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/borrowck/tmp.rs b/gcc/testsuite/rust/borrowck/tmp.rs
index 545a278df052..210153f0209f 100644
--- a/gcc/testsuite/rust/borrowck/tmp.rs
+++ b/gcc/testsuite/rust/borrowck/tmp.rs
@@ -1,6 +1,7 @@
 // { dg-additional-options "-frust-compile-until=compilation -frust-borrowcheck -fdiagnostics-show-caret -fdiagnostics-show-line-numbers" }
 // { dg-enable-nn-line-numbers "" }
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/additional-trait-bounds1.rs b/gcc/testsuite/rust/compile/additional-trait-bounds1.rs
index 449a72fe4612..c629aba4be5e 100644
--- a/gcc/testsuite/rust/compile/additional-trait-bounds1.rs
+++ b/gcc/testsuite/rust/compile/additional-trait-bounds1.rs
@@ -1,4 +1,4 @@
-#![feature(optin_builtin_traits)]
+#![feature(optin_builtin_traits, lang_items)]
 
 pub unsafe auto trait Send {}
 #[lang = "sync"]
diff --git a/gcc/testsuite/rust/compile/additional-trait-bounds2.rs b/gcc/testsuite/rust/compile/additional-trait-bounds2.rs
index 1c49b750319a..7140b3b23b30 100644
--- a/gcc/testsuite/rust/compile/additional-trait-bounds2.rs
+++ b/gcc/testsuite/rust/compile/additional-trait-bounds2.rs
@@ -1,4 +1,4 @@
-#![feature(optin_builtin_traits)]
+#![feature(optin_builtin_traits, lang_items)]
 
 pub unsafe auto trait Send {}
 #[lang = "sync"]
diff --git a/gcc/testsuite/rust/compile/additional-trait-bounds2nr2.rs b/gcc/testsuite/rust/compile/additional-trait-bounds2nr2.rs
index 1c49b750319a..7140b3b23b30 100644
--- a/gcc/testsuite/rust/compile/additional-trait-bounds2nr2.rs
+++ b/gcc/testsuite/rust/compile/additional-trait-bounds2nr2.rs
@@ -1,4 +1,4 @@
-#![feature(optin_builtin_traits)]
+#![feature(optin_builtin_traits, lang_items)]
 
 pub unsafe auto trait Send {}
 #[lang = "sync"]
diff --git a/gcc/testsuite/rust/compile/auto_traits1.rs b/gcc/testsuite/rust/compile/auto_traits1.rs
index 192052d48151..e9f5e0aa65fc 100644
--- a/gcc/testsuite/rust/compile/auto_traits1.rs
+++ b/gcc/testsuite/rust/compile/auto_traits1.rs
@@ -1,6 +1,6 @@
 // { dg-additional-options "-frust-compile-until=typecheck" }
 
-#![feature(optin_builtin_traits)]
+#![feature(optin_builtin_traits, lang_items)]
 
 pub unsafe auto trait Send {}
 #[lang = "sync"]
diff --git a/gcc/testsuite/rust/compile/auto_traits2.rs b/gcc/testsuite/rust/compile/auto_traits2.rs
index 7004761eb158..eda22b503764 100644
--- a/gcc/testsuite/rust/compile/auto_traits2.rs
+++ b/gcc/testsuite/rust/compile/auto_traits2.rs
@@ -1,4 +1,4 @@
-#![feature(optin_builtin_traits)]
+#![feature(optin_builtin_traits, lang_items)]
 
 pub unsafe auto trait Send {}
 #[lang = "sync"]
diff --git a/gcc/testsuite/rust/compile/bad-rpit1.rs b/gcc/testsuite/rust/compile/bad-rpit1.rs
index d8c21b11c64a..c728e36078ab 100644
--- a/gcc/testsuite/rust/compile/bad-rpit1.rs
+++ b/gcc/testsuite/rust/compile/bad-rpit1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/black_box.rs b/gcc/testsuite/rust/compile/black_box.rs
index 80615af5b5d1..35d9e9e1853f 100644
--- a/gcc/testsuite/rust/compile/black_box.rs
+++ b/gcc/testsuite/rust/compile/black_box.rs
@@ -1,5 +1,5 @@
 // { dg-options "-fdump-tree-gimple" }
-#![feature(rustc_attrs)]
+#![feature(rustc_attrs, lang_items)]
 
 #[lang = "sized"]
 pub trait Sized {}
diff --git a/gcc/testsuite/rust/compile/bounds1.rs b/gcc/testsuite/rust/compile/bounds1.rs
index a02e6f63eb97..5891f7112d5a 100644
--- a/gcc/testsuite/rust/compile/bounds1.rs
+++ b/gcc/testsuite/rust/compile/bounds1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/box_syntax_feature_gate.rs b/gcc/testsuite/rust/compile/box_syntax_feature_gate.rs
index 5f62a59a04bf..62e7c10aa99a 100644
--- a/gcc/testsuite/rust/compile/box_syntax_feature_gate.rs
+++ b/gcc/testsuite/rust/compile/box_syntax_feature_gate.rs
@@ -1,4 +1,5 @@
 // { dg-options "-frust-compile-until=lowering" }
+#![feature(lang_items)]
 #[lang = "owned_box"]
 pub struct Box<T>;
 
diff --git a/gcc/testsuite/rust/compile/bug-with-default-generic.rs b/gcc/testsuite/rust/compile/bug-with-default-generic.rs
index 25f46a09c7dc..3f31fccf7de7 100644
--- a/gcc/testsuite/rust/compile/bug-with-default-generic.rs
+++ b/gcc/testsuite/rust/compile/bug-with-default-generic.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/canonical_paths1.rs b/gcc/testsuite/rust/compile/canonical_paths1.rs
index bd6f3b27547c..f80d6e688adc 100644
--- a/gcc/testsuite/rust/compile/canonical_paths1.rs
+++ b/gcc/testsuite/rust/compile/canonical_paths1.rs
@@ -1,4 +1,5 @@
 // { dg-additional-options "-w -fdump-tree-gimple -frust-crate=example" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/cast_generics.rs b/gcc/testsuite/rust/compile/cast_generics.rs
index 469fa942ea0c..6da91933cca1 100644
--- a/gcc/testsuite/rust/compile/cast_generics.rs
+++ b/gcc/testsuite/rust/compile/cast_generics.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/closure_no_type_anno.rs b/gcc/testsuite/rust/compile/closure_no_type_anno.rs
index b647da7b5957..2aab16fc29de 100644
--- a/gcc/testsuite/rust/compile/closure_no_type_anno.rs
+++ b/gcc/testsuite/rust/compile/closure_no_type_anno.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/cmp1.rs b/gcc/testsuite/rust/compile/cmp1.rs
index 4da5b1c01fc3..db1589e66ff5 100644
--- a/gcc/testsuite/rust/compile/cmp1.rs
+++ b/gcc/testsuite/rust/compile/cmp1.rs
@@ -1,6 +1,7 @@
 // { dg-options "-w" }
 // taken from https://github.com/rust-lang/rust/blob/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/core/src/cmp.rs#L98
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/complex_qualified_path_in_expr.rs b/gcc/testsuite/rust/compile/complex_qualified_path_in_expr.rs
index 5036410aca58..85bdaf07088b 100644
--- a/gcc/testsuite/rust/compile/complex_qualified_path_in_expr.rs
+++ b/gcc/testsuite/rust/compile/complex_qualified_path_in_expr.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/const-issue1440.rs b/gcc/testsuite/rust/compile/const-issue1440.rs
index 3a2989cc8d02..43748cf2457d 100644
--- a/gcc/testsuite/rust/compile/const-issue1440.rs
+++ b/gcc/testsuite/rust/compile/const-issue1440.rs
@@ -1,6 +1,7 @@
 // { dg-additional-options "-w" }
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/const_generics_1.rs b/gcc/testsuite/rust/compile/const_generics_1.rs
index 5d4ca64c81d8..b22e07ed57be 100644
--- a/gcc/testsuite/rust/compile/const_generics_1.rs
+++ b/gcc/testsuite/rust/compile/const_generics_1.rs
@@ -3,6 +3,7 @@
 // There are errors about unused generic parameters, but we can't handle that yet.
 // Still, this code is invalid Rust.
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/const_generics_10.rs b/gcc/testsuite/rust/compile/const_generics_10.rs
index 7e3bc86bd9fc..13001269ee18 100644
--- a/gcc/testsuite/rust/compile/const_generics_10.rs
+++ b/gcc/testsuite/rust/compile/const_generics_10.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/const_generics_11.rs b/gcc/testsuite/rust/compile/const_generics_11.rs
index de902ee0d06e..381d9f404eba 100644
--- a/gcc/testsuite/rust/compile/const_generics_11.rs
+++ b/gcc/testsuite/rust/compile/const_generics_11.rs
@@ -1,5 +1,5 @@
 // { dg-options "-w" }
-
+#![feature(lang_items)]
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/const_generics_12.rs b/gcc/testsuite/rust/compile/const_generics_12.rs
index a17c52594b1f..88b151f16ddb 100644
--- a/gcc/testsuite/rust/compile/const_generics_12.rs
+++ b/gcc/testsuite/rust/compile/const_generics_12.rs
@@ -1,5 +1,5 @@
 // { dg-options "-w" }
-
+#![feature(lang_items)]
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/const_generics_13.rs b/gcc/testsuite/rust/compile/const_generics_13.rs
index 20dd0b906ce3..bf8e78e903f7 100644
--- a/gcc/testsuite/rust/compile/const_generics_13.rs
+++ b/gcc/testsuite/rust/compile/const_generics_13.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/const_generics_14.rs b/gcc/testsuite/rust/compile/const_generics_14.rs
index 4d52efb16bb1..e0d206f646db 100644
--- a/gcc/testsuite/rust/compile/const_generics_14.rs
+++ b/gcc/testsuite/rust/compile/const_generics_14.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/const_generics_15.rs b/gcc/testsuite/rust/compile/const_generics_15.rs
index a160abf59f1c..158548ce33b7 100644
--- a/gcc/testsuite/rust/compile/const_generics_15.rs
+++ b/gcc/testsuite/rust/compile/const_generics_15.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/const_generics_16.rs b/gcc/testsuite/rust/compile/const_generics_16.rs
index 060dbda79de6..467be6a68af9 100644
--- a/gcc/testsuite/rust/compile/const_generics_16.rs
+++ b/gcc/testsuite/rust/compile/const_generics_16.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/const_generics_18.rs b/gcc/testsuite/rust/compile/const_generics_18.rs
index 8bcc26158b44..09bb8607e7b7 100644
--- a/gcc/testsuite/rust/compile/const_generics_18.rs
+++ b/gcc/testsuite/rust/compile/const_generics_18.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/const_generics_19.rs b/gcc/testsuite/rust/compile/const_generics_19.rs
index b0932ae60272..73c1419a8a6e 100644
--- a/gcc/testsuite/rust/compile/const_generics_19.rs
+++ b/gcc/testsuite/rust/compile/const_generics_19.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/const_generics_3.rs b/gcc/testsuite/rust/compile/const_generics_3.rs
index 3415f176b2f4..528cf6949afb 100644
--- a/gcc/testsuite/rust/compile/const_generics_3.rs
+++ b/gcc/testsuite/rust/compile/const_generics_3.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/const_generics_8.rs b/gcc/testsuite/rust/compile/const_generics_8.rs
index ce5e1b59bd71..32b7a19a4698 100644
--- a/gcc/testsuite/rust/compile/const_generics_8.rs
+++ b/gcc/testsuite/rust/compile/const_generics_8.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/const_generics_9.rs b/gcc/testsuite/rust/compile/const_generics_9.rs
index 98e2d3ff0683..a3f7485e0163 100644
--- a/gcc/testsuite/rust/compile/const_generics_9.rs
+++ b/gcc/testsuite/rust/compile/const_generics_9.rs
@@ -1,5 +1,5 @@
 // { dg-options "-w" }
-
+#![feature(lang_items)]
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/derive-debug1.rs b/gcc/testsuite/rust/compile/derive-debug1.rs
index 59273743eb9a..f69be0df5f17 100644
--- a/gcc/testsuite/rust/compile/derive-debug1.rs
+++ b/gcc/testsuite/rust/compile/derive-debug1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/derive-default1.rs b/gcc/testsuite/rust/compile/derive-default1.rs
index 902c65eca58d..ad31d5a4c6de 100644
--- a/gcc/testsuite/rust/compile/derive-default1.rs
+++ b/gcc/testsuite/rust/compile/derive-default1.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[derive(Default)]
 struct Foo { _a: i32, _b: i64, _c: u8 }
 
diff --git a/gcc/testsuite/rust/compile/derive-eq-invalid.rs b/gcc/testsuite/rust/compile/derive-eq-invalid.rs
index b0bf856486d3..47fac78193f0 100644
--- a/gcc/testsuite/rust/compile/derive-eq-invalid.rs
+++ b/gcc/testsuite/rust/compile/derive-eq-invalid.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 mod core {
     mod cmp {
         #[lang = "eq"]
diff --git a/gcc/testsuite/rust/compile/derive-hash1.rs b/gcc/testsuite/rust/compile/derive-hash1.rs
index 80e1e2d2bda5..cdcc9b1afac3 100644
--- a/gcc/testsuite/rust/compile/derive-hash1.rs
+++ b/gcc/testsuite/rust/compile/derive-hash1.rs
@@ -1,4 +1,4 @@
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 #[lang = "sized"]
 trait Sized {}
diff --git a/gcc/testsuite/rust/compile/derive-partialeq1.rs b/gcc/testsuite/rust/compile/derive-partialeq1.rs
index 35e33fbc25c2..fbeb0548e8cf 100644
--- a/gcc/testsuite/rust/compile/derive-partialeq1.rs
+++ b/gcc/testsuite/rust/compile/derive-partialeq1.rs
@@ -1,4 +1,4 @@
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 #[lang = "sized"]
 trait Sized {}
diff --git a/gcc/testsuite/rust/compile/derive_clone_enum1.rs b/gcc/testsuite/rust/compile/derive_clone_enum1.rs
index 947dc5c694c7..7dc0a8086d95 100644
--- a/gcc/testsuite/rust/compile/derive_clone_enum1.rs
+++ b/gcc/testsuite/rust/compile/derive_clone_enum1.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "clone"]
 trait Clone {
     pub fn clone(&self) -> Self;
diff --git a/gcc/testsuite/rust/compile/derive_clone_enum2.rs b/gcc/testsuite/rust/compile/derive_clone_enum2.rs
index c7a4ad5fd646..6f5b29aca8b9 100644
--- a/gcc/testsuite/rust/compile/derive_clone_enum2.rs
+++ b/gcc/testsuite/rust/compile/derive_clone_enum2.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "clone"]
 trait Clone {
     pub fn clone(&self) -> Self;
diff --git a/gcc/testsuite/rust/compile/derive_clone_enum3.rs b/gcc/testsuite/rust/compile/derive_clone_enum3.rs
index 92fd6eeeb2b2..7c76ab22858c 100644
--- a/gcc/testsuite/rust/compile/derive_clone_enum3.rs
+++ b/gcc/testsuite/rust/compile/derive_clone_enum3.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "clone"]
 trait Clone {
     pub fn clone(&self) -> Self;
diff --git a/gcc/testsuite/rust/compile/derive_macro1.rs b/gcc/testsuite/rust/compile/derive_macro1.rs
index 8c42abae2d1a..df7c8e386a21 100644
--- a/gcc/testsuite/rust/compile/derive_macro1.rs
+++ b/gcc/testsuite/rust/compile/derive_macro1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/derive_macro3.rs b/gcc/testsuite/rust/compile/derive_macro3.rs
index ad40cae94b51..37b1d505f1d5 100644
--- a/gcc/testsuite/rust/compile/derive_macro3.rs
+++ b/gcc/testsuite/rust/compile/derive_macro3.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/derive_macro4.rs b/gcc/testsuite/rust/compile/derive_macro4.rs
index 8bf1bcaf5f7b..74290196b39f 100644
--- a/gcc/testsuite/rust/compile/derive_macro4.rs
+++ b/gcc/testsuite/rust/compile/derive_macro4.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/derive_macro6.rs b/gcc/testsuite/rust/compile/derive_macro6.rs
index 412144d5917a..d575ff108b45 100644
--- a/gcc/testsuite/rust/compile/derive_macro6.rs
+++ b/gcc/testsuite/rust/compile/derive_macro6.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/derive_partial_ord1.rs b/gcc/testsuite/rust/compile/derive_partial_ord1.rs
index eeca62da0784..4d26de566c6a 100644
--- a/gcc/testsuite/rust/compile/derive_partial_ord1.rs
+++ b/gcc/testsuite/rust/compile/derive_partial_ord1.rs
@@ -1,6 +1,6 @@
 // { dg-additional-options "-w" }
 
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 mod core {
     mod option {
diff --git a/gcc/testsuite/rust/compile/expand_macro_qual_path_in_type.rs b/gcc/testsuite/rust/compile/expand_macro_qual_path_in_type.rs
index 2d60197e15c0..16d120feb1b9 100644
--- a/gcc/testsuite/rust/compile/expand_macro_qual_path_in_type.rs
+++ b/gcc/testsuite/rust/compile/expand_macro_qual_path_in_type.rs
@@ -1,5 +1,6 @@
 // this SEGVs in lowering for now
 // { dg-additional-options "-frust-compile-until=nameresolution" }
+#![feature(lang_items)]
 
 macro_rules! forward_ref_binop {
     (impl $imp:ident, $method:ident for $t:ty, $u:ty) => {
diff --git a/gcc/testsuite/rust/compile/expected_type_args2.rs b/gcc/testsuite/rust/compile/expected_type_args2.rs
index 11a70bec6d46..22702e34a446 100644
--- a/gcc/testsuite/rust/compile/expected_type_args2.rs
+++ b/gcc/testsuite/rust/compile/expected_type_args2.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/expected_type_args3.rs b/gcc/testsuite/rust/compile/expected_type_args3.rs
index 7003f7abcf70..0916ec945d65 100644
--- a/gcc/testsuite/rust/compile/expected_type_args3.rs
+++ b/gcc/testsuite/rust/compile/expected_type_args3.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/extern_generics.rs b/gcc/testsuite/rust/compile/extern_generics.rs
index 26f97a64ff5d..0312626cc4d8 100644
--- a/gcc/testsuite/rust/compile/extern_generics.rs
+++ b/gcc/testsuite/rust/compile/extern_generics.rs
@@ -1,4 +1,5 @@
-#[lang="sized"]
+#![feature(lang_items)]
+#[lang = "sized"]
 trait Sized {}
 
 
diff --git a/gcc/testsuite/rust/compile/for-loop1.rs b/gcc/testsuite/rust/compile/for-loop1.rs
index 21e0399161b5..d42cf673895f 100644
--- a/gcc/testsuite/rust/compile/for-loop1.rs
+++ b/gcc/testsuite/rust/compile/for-loop1.rs
@@ -1,5 +1,5 @@
 // { dg-output "loop\r*\nloop\r*\n" }
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 pub use option::Option::{self, None, Some};
 pub use result::Result::{self, Err, Ok};
diff --git a/gcc/testsuite/rust/compile/for-loop2.rs b/gcc/testsuite/rust/compile/for-loop2.rs
index a0ad06613f51..680fd86a0b57 100644
--- a/gcc/testsuite/rust/compile/for-loop2.rs
+++ b/gcc/testsuite/rust/compile/for-loop2.rs
@@ -1,5 +1,5 @@
 // { dg-output "1\r*\n2\r*\n" }
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 pub use option::Option::{self, None, Some};
 pub use result::Result::{self, Err, Ok};
diff --git a/gcc/testsuite/rust/compile/format_args_basic_expansion.rs b/gcc/testsuite/rust/compile/format_args_basic_expansion.rs
index cedb62c53d93..59101acc86a2 100644
--- a/gcc/testsuite/rust/compile/format_args_basic_expansion.rs
+++ b/gcc/testsuite/rust/compile/format_args_basic_expansion.rs
@@ -1,4 +1,4 @@
-#![feature(rustc_attrs)]
+#![feature(rustc_attrs, lang_items)]
 
 #[rustc_builtin_macro]
 macro_rules! format_args {
diff --git a/gcc/testsuite/rust/compile/format_args_concat.rs b/gcc/testsuite/rust/compile/format_args_concat.rs
index b180667e9e6f..695cde6572b7 100644
--- a/gcc/testsuite/rust/compile/format_args_concat.rs
+++ b/gcc/testsuite/rust/compile/format_args_concat.rs
@@ -1,4 +1,4 @@
-#![feature(rustc_attrs)]
+#![feature(rustc_attrs, lang_items)]
 
 #[rustc_builtin_macro]
 macro_rules! format_args {
diff --git a/gcc/testsuite/rust/compile/format_args_extra_comma.rs b/gcc/testsuite/rust/compile/format_args_extra_comma.rs
index dc48a3a7d2d5..5b8fee512d23 100644
--- a/gcc/testsuite/rust/compile/format_args_extra_comma.rs
+++ b/gcc/testsuite/rust/compile/format_args_extra_comma.rs
@@ -1,4 +1,4 @@
-#![feature(rustc_attrs)]
+#![feature(rustc_attrs, lang_items)]
 
 #[rustc_builtin_macro]
 macro_rules! format_args {
diff --git a/gcc/testsuite/rust/compile/generics1.rs b/gcc/testsuite/rust/compile/generics1.rs
index 9e440af9e3c9..cf3c9e4c32b3 100644
--- a/gcc/testsuite/rust/compile/generics1.rs
+++ b/gcc/testsuite/rust/compile/generics1.rs
@@ -1,5 +1,6 @@
 // { dg-error "mismatched types, expected .i32. but got .i8." "" { target *-*-* } 0 }
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/generics11.rs b/gcc/testsuite/rust/compile/generics11.rs
index 10b5880d5bcb..7202baf7fba7 100644
--- a/gcc/testsuite/rust/compile/generics11.rs
+++ b/gcc/testsuite/rust/compile/generics11.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/generics12.rs b/gcc/testsuite/rust/compile/generics12.rs
index b32f56679caf..21613fb65568 100644
--- a/gcc/testsuite/rust/compile/generics12.rs
+++ b/gcc/testsuite/rust/compile/generics12.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/generics2.rs b/gcc/testsuite/rust/compile/generics2.rs
index 4c95fd1a23c4..0ed8a5fb90b1 100644
--- a/gcc/testsuite/rust/compile/generics2.rs
+++ b/gcc/testsuite/rust/compile/generics2.rs
@@ -1,5 +1,6 @@
 // { dg-error "mismatched types, expected .i32. but got .i8." "" { target *-*-* } 0 }
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/generics3.rs b/gcc/testsuite/rust/compile/generics3.rs
index 514d713a954b..112a24757470 100644
--- a/gcc/testsuite/rust/compile/generics3.rs
+++ b/gcc/testsuite/rust/compile/generics3.rs
@@ -1,4 +1,5 @@
 // { dg-error "mismatched types, expected .i32. but got .i8." "" { target *-*-* } 0 }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/generics4.rs b/gcc/testsuite/rust/compile/generics4.rs
index c4dbc432c07c..e8333d6c304a 100644
--- a/gcc/testsuite/rust/compile/generics4.rs
+++ b/gcc/testsuite/rust/compile/generics4.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/generics6.rs b/gcc/testsuite/rust/compile/generics6.rs
index d77c559db213..67029cd04a1b 100644
--- a/gcc/testsuite/rust/compile/generics6.rs
+++ b/gcc/testsuite/rust/compile/generics6.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/generics7.rs b/gcc/testsuite/rust/compile/generics7.rs
index dcedead4b9f3..e2283a43c9a0 100644
--- a/gcc/testsuite/rust/compile/generics7.rs
+++ b/gcc/testsuite/rust/compile/generics7.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/generics8.rs b/gcc/testsuite/rust/compile/generics8.rs
index 2d30a9ec6025..b38b277a1422 100644
--- a/gcc/testsuite/rust/compile/generics8.rs
+++ b/gcc/testsuite/rust/compile/generics8.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/if_let_expr.rs b/gcc/testsuite/rust/compile/if_let_expr.rs
index b0879e5fadbb..407abd45e6b2 100644
--- a/gcc/testsuite/rust/compile/if_let_expr.rs
+++ b/gcc/testsuite/rust/compile/if_let_expr.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/impl_fnptr.rs b/gcc/testsuite/rust/compile/impl_fnptr.rs
index 20c9d88dc1ad..e7c1bb1e5ef6 100644
--- a/gcc/testsuite/rust/compile/impl_fnptr.rs
+++ b/gcc/testsuite/rust/compile/impl_fnptr.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/impl_trait_diag.rs b/gcc/testsuite/rust/compile/impl_trait_diag.rs
index 54a0cd220a39..e78d2f5e0459 100644
--- a/gcc/testsuite/rust/compile/impl_trait_diag.rs
+++ b/gcc/testsuite/rust/compile/impl_trait_diag.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/impl_trait_generic_arg.rs b/gcc/testsuite/rust/compile/impl_trait_generic_arg.rs
index ecdb08803b40..a304bd693362 100644
--- a/gcc/testsuite/rust/compile/impl_trait_generic_arg.rs
+++ b/gcc/testsuite/rust/compile/impl_trait_generic_arg.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1005.rs b/gcc/testsuite/rust/compile/issue-1005.rs
index 15d4bef08c2a..4c51b30d8632 100644
--- a/gcc/testsuite/rust/compile/issue-1005.rs
+++ b/gcc/testsuite/rust/compile/issue-1005.rs
@@ -1,4 +1,5 @@
 // { dg-additional-options "-w" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1019.rs b/gcc/testsuite/rust/compile/issue-1019.rs
index 1f77ba9d31d6..5bf786c56d81 100644
--- a/gcc/testsuite/rust/compile/issue-1019.rs
+++ b/gcc/testsuite/rust/compile/issue-1019.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1031.rs b/gcc/testsuite/rust/compile/issue-1031.rs
index cd1da47362aa..785573a10bcd 100644
--- a/gcc/testsuite/rust/compile/issue-1031.rs
+++ b/gcc/testsuite/rust/compile/issue-1031.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1034.rs b/gcc/testsuite/rust/compile/issue-1034.rs
index d40005ec5d97..ef5f7c713c18 100644
--- a/gcc/testsuite/rust/compile/issue-1034.rs
+++ b/gcc/testsuite/rust/compile/issue-1034.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1128.rs b/gcc/testsuite/rust/compile/issue-1128.rs
index 8960ebbea63d..de4691992960 100644
--- a/gcc/testsuite/rust/compile/issue-1128.rs
+++ b/gcc/testsuite/rust/compile/issue-1128.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1129-2.rs b/gcc/testsuite/rust/compile/issue-1129-2.rs
index cfe01b5b4db5..4b4f004a0e16 100644
--- a/gcc/testsuite/rust/compile/issue-1129-2.rs
+++ b/gcc/testsuite/rust/compile/issue-1129-2.rs
@@ -1,4 +1,5 @@
 // { dg-additional-options "-w" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1130.rs b/gcc/testsuite/rust/compile/issue-1130.rs
index 115e6aad2f15..0219ed23f446 100644
--- a/gcc/testsuite/rust/compile/issue-1130.rs
+++ b/gcc/testsuite/rust/compile/issue-1130.rs
@@ -1,6 +1,7 @@
 // { dg-additional-options "-w" }
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1131.rs b/gcc/testsuite/rust/compile/issue-1131.rs
index 86eeb98453ac..c014e736894e 100644
--- a/gcc/testsuite/rust/compile/issue-1131.rs
+++ b/gcc/testsuite/rust/compile/issue-1131.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1165.rs b/gcc/testsuite/rust/compile/issue-1165.rs
index a6378239519e..ce57ebf7fdc5 100644
--- a/gcc/testsuite/rust/compile/issue-1165.rs
+++ b/gcc/testsuite/rust/compile/issue-1165.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1173.rs b/gcc/testsuite/rust/compile/issue-1173.rs
index a8fd93eea1b1..59b0adf67de8 100644
--- a/gcc/testsuite/rust/compile/issue-1173.rs
+++ b/gcc/testsuite/rust/compile/issue-1173.rs
@@ -2,6 +2,7 @@
 
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1235.rs b/gcc/testsuite/rust/compile/issue-1235.rs
index 7c85ac4a6b00..6376e9e6a988 100644
--- a/gcc/testsuite/rust/compile/issue-1235.rs
+++ b/gcc/testsuite/rust/compile/issue-1235.rs
@@ -1,4 +1,5 @@
 // { dg-additional-options "-w" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1237.rs b/gcc/testsuite/rust/compile/issue-1237.rs
index 79b60b07b522..506a6bf7059e 100644
--- a/gcc/testsuite/rust/compile/issue-1237.rs
+++ b/gcc/testsuite/rust/compile/issue-1237.rs
@@ -1,6 +1,7 @@
 // { dg-additional-options "-w" }
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1289.rs b/gcc/testsuite/rust/compile/issue-1289.rs
index 9251d79290bb..58ab0b66df3c 100644
--- a/gcc/testsuite/rust/compile/issue-1289.rs
+++ b/gcc/testsuite/rust/compile/issue-1289.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1383.rs b/gcc/testsuite/rust/compile/issue-1383.rs
index dac4b2a12552..f8ccd577b62f 100644
--- a/gcc/testsuite/rust/compile/issue-1383.rs
+++ b/gcc/testsuite/rust/compile/issue-1383.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1447.rs b/gcc/testsuite/rust/compile/issue-1447.rs
index 6d58f7a6eea3..afeef17151f3 100644
--- a/gcc/testsuite/rust/compile/issue-1447.rs
+++ b/gcc/testsuite/rust/compile/issue-1447.rs
@@ -1,4 +1,5 @@
 // { dg-options "-w" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1483.rs b/gcc/testsuite/rust/compile/issue-1483.rs
index eda7e139283d..96ca72e43684 100644
--- a/gcc/testsuite/rust/compile/issue-1483.rs
+++ b/gcc/testsuite/rust/compile/issue-1483.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1485.rs b/gcc/testsuite/rust/compile/issue-1485.rs
index a0cd5a0f1f92..958fcd14db99 100644
--- a/gcc/testsuite/rust/compile/issue-1485.rs
+++ b/gcc/testsuite/rust/compile/issue-1485.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1487.rs b/gcc/testsuite/rust/compile/issue-1487.rs
index 4a4d759ef2e9..dd346517f40a 100644
--- a/gcc/testsuite/rust/compile/issue-1487.rs
+++ b/gcc/testsuite/rust/compile/issue-1487.rs
@@ -1,4 +1,6 @@
 // { dg-options "-w" }
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1589.rs b/gcc/testsuite/rust/compile/issue-1589.rs
index 1dd7a45286c4..dd7b4c0893bd 100644
--- a/gcc/testsuite/rust/compile/issue-1589.rs
+++ b/gcc/testsuite/rust/compile/issue-1589.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1725-1.rs b/gcc/testsuite/rust/compile/issue-1725-1.rs
index a02e6f63eb97..5891f7112d5a 100644
--- a/gcc/testsuite/rust/compile/issue-1725-1.rs
+++ b/gcc/testsuite/rust/compile/issue-1725-1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1725-2.rs b/gcc/testsuite/rust/compile/issue-1725-2.rs
index d6a2d686c05e..3386f279ed0f 100644
--- a/gcc/testsuite/rust/compile/issue-1725-2.rs
+++ b/gcc/testsuite/rust/compile/issue-1725-2.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1786.rs b/gcc/testsuite/rust/compile/issue-1786.rs
index 1c46fee6a870..e4f94bd87e25 100644
--- a/gcc/testsuite/rust/compile/issue-1786.rs
+++ b/gcc/testsuite/rust/compile/issue-1786.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1893.rs b/gcc/testsuite/rust/compile/issue-1893.rs
index 46c53e9ce7ae..47cde451e26a 100644
--- a/gcc/testsuite/rust/compile/issue-1893.rs
+++ b/gcc/testsuite/rust/compile/issue-1893.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1901.rs b/gcc/testsuite/rust/compile/issue-1901.rs
index b43e34f702f1..110b939dacd7 100644
--- a/gcc/testsuite/rust/compile/issue-1901.rs
+++ b/gcc/testsuite/rust/compile/issue-1901.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1930.rs b/gcc/testsuite/rust/compile/issue-1930.rs
index 071b3dae21c3..5eea2291d7e5 100644
--- a/gcc/testsuite/rust/compile/issue-1930.rs
+++ b/gcc/testsuite/rust/compile/issue-1930.rs
@@ -1,4 +1,5 @@
 // { dg-options "-w" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-1981.rs b/gcc/testsuite/rust/compile/issue-1981.rs
index de9588c60ada..c71cecf38f23 100644
--- a/gcc/testsuite/rust/compile/issue-1981.rs
+++ b/gcc/testsuite/rust/compile/issue-1981.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2015.rs b/gcc/testsuite/rust/compile/issue-2015.rs
index 7e0365163e5a..57630960f732 100644
--- a/gcc/testsuite/rust/compile/issue-2015.rs
+++ b/gcc/testsuite/rust/compile/issue-2015.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2019-1.rs b/gcc/testsuite/rust/compile/issue-2019-1.rs
index e91e347b2ea6..e3174b13cf3e 100644
--- a/gcc/testsuite/rust/compile/issue-2019-1.rs
+++ b/gcc/testsuite/rust/compile/issue-2019-1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2019-2.rs b/gcc/testsuite/rust/compile/issue-2019-2.rs
index 9f7c0c01bbe5..eefe44d35bb3 100644
--- a/gcc/testsuite/rust/compile/issue-2019-2.rs
+++ b/gcc/testsuite/rust/compile/issue-2019-2.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2019-3.rs b/gcc/testsuite/rust/compile/issue-2019-3.rs
index c95ce43083ab..7f00d8239edd 100644
--- a/gcc/testsuite/rust/compile/issue-2019-3.rs
+++ b/gcc/testsuite/rust/compile/issue-2019-3.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2036.rs b/gcc/testsuite/rust/compile/issue-2036.rs
index 8701b204fd32..03b8ed05b29a 100644
--- a/gcc/testsuite/rust/compile/issue-2036.rs
+++ b/gcc/testsuite/rust/compile/issue-2036.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2037.rs b/gcc/testsuite/rust/compile/issue-2037.rs
index 8adcb9751098..0d929d527906 100644
--- a/gcc/testsuite/rust/compile/issue-2037.rs
+++ b/gcc/testsuite/rust/compile/issue-2037.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2070.rs b/gcc/testsuite/rust/compile/issue-2070.rs
index 981e59926fbb..f4dc36005368 100644
--- a/gcc/testsuite/rust/compile/issue-2070.rs
+++ b/gcc/testsuite/rust/compile/issue-2070.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2105.rs b/gcc/testsuite/rust/compile/issue-2105.rs
index 28f170e51cf1..4446b2678481 100644
--- a/gcc/testsuite/rust/compile/issue-2105.rs
+++ b/gcc/testsuite/rust/compile/issue-2105.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2106.rs b/gcc/testsuite/rust/compile/issue-2106.rs
index 4af57c866525..a75d21b8ebbe 100644
--- a/gcc/testsuite/rust/compile/issue-2106.rs
+++ b/gcc/testsuite/rust/compile/issue-2106.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2135.rs b/gcc/testsuite/rust/compile/issue-2135.rs
index 9f4d3e1b6c18..e2d5ed26e683 100644
--- a/gcc/testsuite/rust/compile/issue-2135.rs
+++ b/gcc/testsuite/rust/compile/issue-2135.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2136-1.rs b/gcc/testsuite/rust/compile/issue-2136-1.rs
index f0af551f87ea..eee8a6827937 100644
--- a/gcc/testsuite/rust/compile/issue-2136-1.rs
+++ b/gcc/testsuite/rust/compile/issue-2136-1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2136-2.rs b/gcc/testsuite/rust/compile/issue-2136-2.rs
index b25820dadfb5..b30c9d24d864 100644
--- a/gcc/testsuite/rust/compile/issue-2136-2.rs
+++ b/gcc/testsuite/rust/compile/issue-2136-2.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2139.rs b/gcc/testsuite/rust/compile/issue-2139.rs
index 65f82f39f40a..ba3736fb3d9c 100644
--- a/gcc/testsuite/rust/compile/issue-2139.rs
+++ b/gcc/testsuite/rust/compile/issue-2139.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2142.rs b/gcc/testsuite/rust/compile/issue-2142.rs
index a3ec228c0e12..e4c0c926ebe6 100644
--- a/gcc/testsuite/rust/compile/issue-2142.rs
+++ b/gcc/testsuite/rust/compile/issue-2142.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2165.rs b/gcc/testsuite/rust/compile/issue-2165.rs
index 5bbde65928b4..38288e988f5e 100644
--- a/gcc/testsuite/rust/compile/issue-2165.rs
+++ b/gcc/testsuite/rust/compile/issue-2165.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2166.rs b/gcc/testsuite/rust/compile/issue-2166.rs
index 142ed178e7e4..d9e07a60e465 100644
--- a/gcc/testsuite/rust/compile/issue-2166.rs
+++ b/gcc/testsuite/rust/compile/issue-2166.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2190-1.rs b/gcc/testsuite/rust/compile/issue-2190-1.rs
index 927f90d6c9b0..ad0f168e7300 100644
--- a/gcc/testsuite/rust/compile/issue-2190-1.rs
+++ b/gcc/testsuite/rust/compile/issue-2190-1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2190-2.rs b/gcc/testsuite/rust/compile/issue-2190-2.rs
index 1c933386aa46..c1abfb617c3c 100644
--- a/gcc/testsuite/rust/compile/issue-2190-2.rs
+++ b/gcc/testsuite/rust/compile/issue-2190-2.rs
@@ -1,4 +1,5 @@
 // { dg-options "-w" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2195.rs b/gcc/testsuite/rust/compile/issue-2195.rs
index fc158c39bb4b..0a917a86a2c9 100644
--- a/gcc/testsuite/rust/compile/issue-2195.rs
+++ b/gcc/testsuite/rust/compile/issue-2195.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2238.rs b/gcc/testsuite/rust/compile/issue-2238.rs
index 6a43a13dfe7a..6bbbca4a6de4 100644
--- a/gcc/testsuite/rust/compile/issue-2238.rs
+++ b/gcc/testsuite/rust/compile/issue-2238.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2304.rs b/gcc/testsuite/rust/compile/issue-2304.rs
index 83130336ebec..cef8fc80739b 100644
--- a/gcc/testsuite/rust/compile/issue-2304.rs
+++ b/gcc/testsuite/rust/compile/issue-2304.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2323.rs b/gcc/testsuite/rust/compile/issue-2323.rs
index 02a3f90b4d81..2c69214ab08f 100644
--- a/gcc/testsuite/rust/compile/issue-2323.rs
+++ b/gcc/testsuite/rust/compile/issue-2323.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2330.rs b/gcc/testsuite/rust/compile/issue-2330.rs
index 6ab46c7c8ef8..21637cb9a8a5 100644
--- a/gcc/testsuite/rust/compile/issue-2330.rs
+++ b/gcc/testsuite/rust/compile/issue-2330.rs
@@ -1,5 +1,5 @@
 // { dg-options "-w" }
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 pub use option::Option::{self, None, Some};
 pub use result::Result::{self, Err, Ok};
diff --git a/gcc/testsuite/rust/compile/issue-2369.rs b/gcc/testsuite/rust/compile/issue-2369.rs
index 9475aef9d71f..e5a30307a6e4 100644
--- a/gcc/testsuite/rust/compile/issue-2369.rs
+++ b/gcc/testsuite/rust/compile/issue-2369.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2375.rs b/gcc/testsuite/rust/compile/issue-2375.rs
index a61fef8b618c..e3b9c9f13536 100644
--- a/gcc/testsuite/rust/compile/issue-2375.rs
+++ b/gcc/testsuite/rust/compile/issue-2375.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2478.rs b/gcc/testsuite/rust/compile/issue-2478.rs
index 7fe4e2d2a94b..1cce4b2853d4 100644
--- a/gcc/testsuite/rust/compile/issue-2478.rs
+++ b/gcc/testsuite/rust/compile/issue-2478.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2499.rs b/gcc/testsuite/rust/compile/issue-2499.rs
index 662d58fb5b12..f6d40d894fa5 100644
--- a/gcc/testsuite/rust/compile/issue-2499.rs
+++ b/gcc/testsuite/rust/compile/issue-2499.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2723-1.rs b/gcc/testsuite/rust/compile/issue-2723-1.rs
index 261956de42e4..5c773832cbde 100644
--- a/gcc/testsuite/rust/compile/issue-2723-1.rs
+++ b/gcc/testsuite/rust/compile/issue-2723-1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2723-2.rs b/gcc/testsuite/rust/compile/issue-2723-2.rs
index c7609d1e14dc..4baf088dbd70 100644
--- a/gcc/testsuite/rust/compile/issue-2723-2.rs
+++ b/gcc/testsuite/rust/compile/issue-2723-2.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2725.rs b/gcc/testsuite/rust/compile/issue-2725.rs
index a344bc8d4641..06b1a8900f19 100644
--- a/gcc/testsuite/rust/compile/issue-2725.rs
+++ b/gcc/testsuite/rust/compile/issue-2725.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 trait Trait: ?Sized {} // { dg-error ".?Trait. is not permitted in supertraits" }
diff --git a/gcc/testsuite/rust/compile/issue-2747.rs b/gcc/testsuite/rust/compile/issue-2747.rs
index a9c09e7372f4..fe4b572d7926 100644
--- a/gcc/testsuite/rust/compile/issue-2747.rs
+++ b/gcc/testsuite/rust/compile/issue-2747.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2772-1.rs b/gcc/testsuite/rust/compile/issue-2772-1.rs
index 69977db0bfb5..aad85917393c 100644
--- a/gcc/testsuite/rust/compile/issue-2772-1.rs
+++ b/gcc/testsuite/rust/compile/issue-2772-1.rs
@@ -1,4 +1,5 @@
 // { dg-options "-w" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2772-2.rs b/gcc/testsuite/rust/compile/issue-2772-2.rs
index b05f2b1dc2ba..0e1832460534 100644
--- a/gcc/testsuite/rust/compile/issue-2772-2.rs
+++ b/gcc/testsuite/rust/compile/issue-2772-2.rs
@@ -1,4 +1,5 @@
 // { dg-options "-w" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2775.rs b/gcc/testsuite/rust/compile/issue-2775.rs
index 3ad7085785ea..d67ced3e270d 100644
--- a/gcc/testsuite/rust/compile/issue-2775.rs
+++ b/gcc/testsuite/rust/compile/issue-2775.rs
@@ -1,4 +1,5 @@
 // { dg-options "-w" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2782.rs b/gcc/testsuite/rust/compile/issue-2782.rs
index e199c882c868..61fc20c143a1 100644
--- a/gcc/testsuite/rust/compile/issue-2782.rs
+++ b/gcc/testsuite/rust/compile/issue-2782.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2907.rs b/gcc/testsuite/rust/compile/issue-2907.rs
index fdf1953fc8c1..8c0d49673e77 100644
--- a/gcc/testsuite/rust/compile/issue-2907.rs
+++ b/gcc/testsuite/rust/compile/issue-2907.rs
@@ -1,5 +1,6 @@
 #![feature(lang_items)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2951.rs b/gcc/testsuite/rust/compile/issue-2951.rs
index d30a3bf2adf1..218332d81eab 100644
--- a/gcc/testsuite/rust/compile/issue-2951.rs
+++ b/gcc/testsuite/rust/compile/issue-2951.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2953-1.rs b/gcc/testsuite/rust/compile/issue-2953-1.rs
index d07059e440e0..d3289b933c96 100644
--- a/gcc/testsuite/rust/compile/issue-2953-1.rs
+++ b/gcc/testsuite/rust/compile/issue-2953-1.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 pub trait Sized {
     // Empty.
diff --git a/gcc/testsuite/rust/compile/issue-2953-2.rs b/gcc/testsuite/rust/compile/issue-2953-2.rs
index 59276246a1c2..5fbd6c45ac51 100644
--- a/gcc/testsuite/rust/compile/issue-2953-2.rs
+++ b/gcc/testsuite/rust/compile/issue-2953-2.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 pub trait Sized {
     // Empty.
diff --git a/gcc/testsuite/rust/compile/issue-2954.rs b/gcc/testsuite/rust/compile/issue-2954.rs
index 52f7c9140ecc..973ee0a425df 100644
--- a/gcc/testsuite/rust/compile/issue-2954.rs
+++ b/gcc/testsuite/rust/compile/issue-2954.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-2987.rs b/gcc/testsuite/rust/compile/issue-2987.rs
index 1ab5fdc3647b..9560bde36623 100644
--- a/gcc/testsuite/rust/compile/issue-2987.rs
+++ b/gcc/testsuite/rust/compile/issue-2987.rs
@@ -1,5 +1,6 @@
 // { dg-options "-w" } Currently there are a lot of warnings produced from inside clone/copy
 // builtins
+#![feature(lang_items)]
 
 #[lang = "copy"]
 trait Copy {}
diff --git a/gcc/testsuite/rust/compile/issue-3009.rs b/gcc/testsuite/rust/compile/issue-3009.rs
index 2eb4ef39abdc..3d6fb9fd632a 100644
--- a/gcc/testsuite/rust/compile/issue-3009.rs
+++ b/gcc/testsuite/rust/compile/issue-3009.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-3022.rs b/gcc/testsuite/rust/compile/issue-3022.rs
index b8b8e6fd5c79..e9358c9aaeee 100644
--- a/gcc/testsuite/rust/compile/issue-3022.rs
+++ b/gcc/testsuite/rust/compile/issue-3022.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-3030.rs b/gcc/testsuite/rust/compile/issue-3030.rs
index 0a1866d9a6b2..94222b78ac86 100644
--- a/gcc/testsuite/rust/compile/issue-3030.rs
+++ b/gcc/testsuite/rust/compile/issue-3030.rs
@@ -1,5 +1,6 @@
 #![feature(negative_impls)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-3032-1.rs b/gcc/testsuite/rust/compile/issue-3032-1.rs
index e9eb02794ce4..7338cb99b415 100644
--- a/gcc/testsuite/rust/compile/issue-3032-1.rs
+++ b/gcc/testsuite/rust/compile/issue-3032-1.rs
@@ -1,4 +1,4 @@
-#![feature(negative_impls)]
+#![feature(negative_impls, lang_items)]
 
 #[lang = "sized"]
 trait Sized {}
diff --git a/gcc/testsuite/rust/compile/issue-3032-2.rs b/gcc/testsuite/rust/compile/issue-3032-2.rs
index 9e09d4190720..37c081b8c911 100644
--- a/gcc/testsuite/rust/compile/issue-3032-2.rs
+++ b/gcc/testsuite/rust/compile/issue-3032-2.rs
@@ -1,4 +1,4 @@
-#![feature(negative_impls)]
+#![feature(negative_impls, lang_items)]
 
 #[lang = "sized"]
 trait Sized {}
diff --git a/gcc/testsuite/rust/compile/issue-3033.rs b/gcc/testsuite/rust/compile/issue-3033.rs
index 9085b7616c0d..7adce5bd1229 100644
--- a/gcc/testsuite/rust/compile/issue-3033.rs
+++ b/gcc/testsuite/rust/compile/issue-3033.rs
@@ -1,4 +1,4 @@
-#![feature(negative_impls)]
+#![feature(negative_impls, lang_items)]
 
 #[lang = "copy"]
 trait Copy {}
diff --git a/gcc/testsuite/rust/compile/issue-3035.rs b/gcc/testsuite/rust/compile/issue-3035.rs
index 3266d841dea0..80c2ab62f86b 100644
--- a/gcc/testsuite/rust/compile/issue-3035.rs
+++ b/gcc/testsuite/rust/compile/issue-3035.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-3036.rs b/gcc/testsuite/rust/compile/issue-3036.rs
index 4418ccc04cb9..39856d574781 100644
--- a/gcc/testsuite/rust/compile/issue-3036.rs
+++ b/gcc/testsuite/rust/compile/issue-3036.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-3045-1.rs b/gcc/testsuite/rust/compile/issue-3045-1.rs
index a1328f22d0cd..1f62e368f425 100644
--- a/gcc/testsuite/rust/compile/issue-3045-1.rs
+++ b/gcc/testsuite/rust/compile/issue-3045-1.rs
@@ -1,4 +1,4 @@
-#![feature(dropck_eyepatch)]
+#![feature(dropck_eyepatch, lang_items)]
 #[allow(dead_code)]
 
 #[lang = "sized"]
diff --git a/gcc/testsuite/rust/compile/issue-3045-2.rs b/gcc/testsuite/rust/compile/issue-3045-2.rs
index 177707fb4750..4c90d4d8c3ea 100644
--- a/gcc/testsuite/rust/compile/issue-3045-2.rs
+++ b/gcc/testsuite/rust/compile/issue-3045-2.rs
@@ -1,4 +1,4 @@
-#![feature(dropck_eyepatch)]
+#![feature(dropck_eyepatch, lang_items)]
 #[allow(dead_code)]
 
 #[lang = "sized"]
diff --git a/gcc/testsuite/rust/compile/issue-3144.rs b/gcc/testsuite/rust/compile/issue-3144.rs
index 4e61078a0dcc..02c6ff6e1d24 100644
--- a/gcc/testsuite/rust/compile/issue-3144.rs
+++ b/gcc/testsuite/rust/compile/issue-3144.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-3242.rs b/gcc/testsuite/rust/compile/issue-3242.rs
index a4542aea00b0..a6bd1c838c99 100644
--- a/gcc/testsuite/rust/compile/issue-3242.rs
+++ b/gcc/testsuite/rust/compile/issue-3242.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-3304.rs b/gcc/testsuite/rust/compile/issue-3304.rs
index cc376faeb9dc..aa857e229d79 100644
--- a/gcc/testsuite/rust/compile/issue-3304.rs
+++ b/gcc/testsuite/rust/compile/issue-3304.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-3382.rs b/gcc/testsuite/rust/compile/issue-3382.rs
index 6f4382f1b523..c26494c632b8 100644
--- a/gcc/testsuite/rust/compile/issue-3382.rs
+++ b/gcc/testsuite/rust/compile/issue-3382.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-3402-1.rs b/gcc/testsuite/rust/compile/issue-3402-1.rs
index ed603cecaada..cd13b748cee0 100644
--- a/gcc/testsuite/rust/compile/issue-3402-1.rs
+++ b/gcc/testsuite/rust/compile/issue-3402-1.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 pub struct Foo {
     a: i32,
     // { dg-warning "field is never read" "" { target *-*-* } .-1 }
diff --git a/gcc/testsuite/rust/compile/issue-3402-2.rs b/gcc/testsuite/rust/compile/issue-3402-2.rs
index b665af25b51f..33d72e08f2ef 100644
--- a/gcc/testsuite/rust/compile/issue-3402-2.rs
+++ b/gcc/testsuite/rust/compile/issue-3402-2.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 pub struct Bar(i32);
 
 #[lang = "sized"]
diff --git a/gcc/testsuite/rust/compile/issue-3403.rs b/gcc/testsuite/rust/compile/issue-3403.rs
index ced6b4efd975..6a3f7200a7bd 100644
--- a/gcc/testsuite/rust/compile/issue-3403.rs
+++ b/gcc/testsuite/rust/compile/issue-3403.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 pub struct Foo {
     a: i32,
     // { dg-warning "field is never read" "" { target *-*-* } .-1 }
diff --git a/gcc/testsuite/rust/compile/issue-3454.rs b/gcc/testsuite/rust/compile/issue-3454.rs
index 2a3c0c714606..e2a5a39b4549 100644
--- a/gcc/testsuite/rust/compile/issue-3454.rs
+++ b/gcc/testsuite/rust/compile/issue-3454.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-3551.rs b/gcc/testsuite/rust/compile/issue-3551.rs
index 6d6a8129885d..55303b21f7c1 100644
--- a/gcc/testsuite/rust/compile/issue-3551.rs
+++ b/gcc/testsuite/rust/compile/issue-3551.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-3554-2.rs b/gcc/testsuite/rust/compile/issue-3554-2.rs
index e455a8b2cec0..3710e5778ab2 100644
--- a/gcc/testsuite/rust/compile/issue-3554-2.rs
+++ b/gcc/testsuite/rust/compile/issue-3554-2.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-3599.rs b/gcc/testsuite/rust/compile/issue-3599.rs
index 1d29fac84e93..a41d2b3ae00e 100644
--- a/gcc/testsuite/rust/compile/issue-3599.rs
+++ b/gcc/testsuite/rust/compile/issue-3599.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-3642.rs b/gcc/testsuite/rust/compile/issue-3642.rs
index 6d9decc8616d..30abfd3b251a 100644
--- a/gcc/testsuite/rust/compile/issue-3642.rs
+++ b/gcc/testsuite/rust/compile/issue-3642.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-3711.rs b/gcc/testsuite/rust/compile/issue-3711.rs
index a3f9c39b4c58..911d4adbc2c9 100644
--- a/gcc/testsuite/rust/compile/issue-3711.rs
+++ b/gcc/testsuite/rust/compile/issue-3711.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-3836.rs b/gcc/testsuite/rust/compile/issue-3836.rs
index a2287957ad14..8cc661febc76 100644
--- a/gcc/testsuite/rust/compile/issue-3836.rs
+++ b/gcc/testsuite/rust/compile/issue-3836.rs
@@ -1,4 +1,6 @@
 // { dg-options "-w" }
+#![feature(lang_items)]
+
 mod core {
     mod option {
         pub enum Option<T> {
diff --git a/gcc/testsuite/rust/compile/issue-3898.rs b/gcc/testsuite/rust/compile/issue-3898.rs
index 114370cf8815..8199267469ad 100644
--- a/gcc/testsuite/rust/compile/issue-3898.rs
+++ b/gcc/testsuite/rust/compile/issue-3898.rs
@@ -1,4 +1,5 @@
 // { dg-additional-options "-frust-compile-until=lowering" }
+#![feature(lang_items)]
 
 #[lang = "sized"]
 trait Sized {}
diff --git a/gcc/testsuite/rust/compile/issue-3915.rs b/gcc/testsuite/rust/compile/issue-3915.rs
index 7132036f92ff..5cd8dc022297 100644
--- a/gcc/testsuite/rust/compile/issue-3915.rs
+++ b/gcc/testsuite/rust/compile/issue-3915.rs
@@ -1,4 +1,6 @@
 // { dg-options "-w" }
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-3916.rs b/gcc/testsuite/rust/compile/issue-3916.rs
index 59b522b4ed5c..c4adb643c3f3 100644
--- a/gcc/testsuite/rust/compile/issue-3916.rs
+++ b/gcc/testsuite/rust/compile/issue-3916.rs
@@ -1,4 +1,4 @@
-#![feature(rustc_attrs)]
+#![feature(rustc_attrs, lang_items)]
 
 #[lang = "sized"]
 trait Sized {}
diff --git a/gcc/testsuite/rust/compile/issue-3969.rs b/gcc/testsuite/rust/compile/issue-3969.rs
index 9608589c3e27..6715978c4f6a 100644
--- a/gcc/testsuite/rust/compile/issue-3969.rs
+++ b/gcc/testsuite/rust/compile/issue-3969.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 pub trait Sized {
     // Empty.
diff --git a/gcc/testsuite/rust/compile/issue-402.rs b/gcc/testsuite/rust/compile/issue-402.rs
index 2c99fc8f2485..ec398e9bc960 100644
--- a/gcc/testsuite/rust/compile/issue-402.rs
+++ b/gcc/testsuite/rust/compile/issue-402.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-4090-1.rs b/gcc/testsuite/rust/compile/issue-4090-1.rs
index 9f83835ee4a3..04119432fba4 100644
--- a/gcc/testsuite/rust/compile/issue-4090-1.rs
+++ b/gcc/testsuite/rust/compile/issue-4090-1.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 mod core {
     mod marker {
         #[lang = "sized"]
diff --git a/gcc/testsuite/rust/compile/issue-4090-2.rs b/gcc/testsuite/rust/compile/issue-4090-2.rs
index 75d6b7c6407c..7b76c0aa6030 100644
--- a/gcc/testsuite/rust/compile/issue-4090-2.rs
+++ b/gcc/testsuite/rust/compile/issue-4090-2.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 mod core {
     mod marker {
         #[lang = "sized"]
diff --git a/gcc/testsuite/rust/compile/issue-850.rs b/gcc/testsuite/rust/compile/issue-850.rs
index e42b5573d1d1..c6a5f316f6a8 100644
--- a/gcc/testsuite/rust/compile/issue-850.rs
+++ b/gcc/testsuite/rust/compile/issue-850.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/issue-855.rs b/gcc/testsuite/rust/compile/issue-855.rs
index 9e450ddda3ae..3736d087b8e7 100644
--- a/gcc/testsuite/rust/compile/issue-855.rs
+++ b/gcc/testsuite/rust/compile/issue-855.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 pub use result::Result::{self, Err, Ok};
 
 #[lang = "sized"]
diff --git a/gcc/testsuite/rust/compile/issue-925.rs b/gcc/testsuite/rust/compile/issue-925.rs
index 507fe9444e5f..34c611b99b38 100644
--- a/gcc/testsuite/rust/compile/issue-925.rs
+++ b/gcc/testsuite/rust/compile/issue-925.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/iterators1.rs b/gcc/testsuite/rust/compile/iterators1.rs
index 2ea3d741c9f3..4bbc47e25707 100644
--- a/gcc/testsuite/rust/compile/iterators1.rs
+++ b/gcc/testsuite/rust/compile/iterators1.rs
@@ -1,4 +1,4 @@
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 pub use option::Option::{self, None, Some};
 pub use result::Result::{self, Err, Ok};
diff --git a/gcc/testsuite/rust/compile/macros/builtin/option_env1.rs b/gcc/testsuite/rust/compile/macros/builtin/option_env1.rs
index cf9f65b0ea4a..b96c1ee255d2 100644
--- a/gcc/testsuite/rust/compile/macros/builtin/option_env1.rs
+++ b/gcc/testsuite/rust/compile/macros/builtin/option_env1.rs
@@ -1,4 +1,4 @@
-#![feature(rustc_attrs)]
+#![feature(rustc_attrs, lang_items)]
 
 #[rustc_builtin_macro]
 macro_rules! option_env {
diff --git a/gcc/testsuite/rust/compile/macros/builtin/option_env2.rs b/gcc/testsuite/rust/compile/macros/builtin/option_env2.rs
index 63f72545fd9d..ef0e563b9470 100644
--- a/gcc/testsuite/rust/compile/macros/builtin/option_env2.rs
+++ b/gcc/testsuite/rust/compile/macros/builtin/option_env2.rs
@@ -1,4 +1,4 @@
-#![feature(rustc_attrs)]
+#![feature(rustc_attrs, lang_items)]
 
 #[rustc_builtin_macro]
 macro_rules! option_env {
diff --git a/gcc/testsuite/rust/compile/macros/builtin/option_env3.rs b/gcc/testsuite/rust/compile/macros/builtin/option_env3.rs
index ad6dd4c21da2..545f3c8d5662 100644
--- a/gcc/testsuite/rust/compile/macros/builtin/option_env3.rs
+++ b/gcc/testsuite/rust/compile/macros/builtin/option_env3.rs
@@ -1,4 +1,4 @@
-#![feature(rustc_attrs)]
+#![feature(rustc_attrs, lang_items)]
 
 #[rustc_builtin_macro]
 macro_rules! option_env {
diff --git a/gcc/testsuite/rust/compile/macros/mbe/macro-issue1400.rs b/gcc/testsuite/rust/compile/macros/mbe/macro-issue1400.rs
index 5c51b78065c1..0708128703af 100644
--- a/gcc/testsuite/rust/compile/macros/mbe/macro-issue1400.rs
+++ b/gcc/testsuite/rust/compile/macros/mbe/macro-issue1400.rs
@@ -1,5 +1,6 @@
 // { dg-additional-options "-w" }
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/macros/mbe/macro-issue3708.rs b/gcc/testsuite/rust/compile/macros/mbe/macro-issue3708.rs
index bcbc8dd695af..bbf027655810 100644
--- a/gcc/testsuite/rust/compile/macros/mbe/macro-issue3708.rs
+++ b/gcc/testsuite/rust/compile/macros/mbe/macro-issue3708.rs
@@ -1,4 +1,5 @@
 // { dg-additional-options "-frust-compile-until=lowering" }
+#![feature(lang_items)]
 
 macro_rules! impl_fn_for_zst {
     ($(
diff --git a/gcc/testsuite/rust/compile/macros/mbe/macro-issue3709-2.rs b/gcc/testsuite/rust/compile/macros/mbe/macro-issue3709-2.rs
index 47514f1e998b..4d7649737368 100644
--- a/gcc/testsuite/rust/compile/macros/mbe/macro-issue3709-2.rs
+++ b/gcc/testsuite/rust/compile/macros/mbe/macro-issue3709-2.rs
@@ -1,4 +1,5 @@
 // { dg-additional-options "-frust-compile-until=lowering" }
+#![feature(lang_items)]
 
 macro_rules! impl_fn_for_zst {
     ($(
diff --git a/gcc/testsuite/rust/compile/macros/mbe/macro20.rs b/gcc/testsuite/rust/compile/macros/mbe/macro20.rs
index e03455b1b01f..448183414bd4 100644
--- a/gcc/testsuite/rust/compile/macros/mbe/macro20.rs
+++ b/gcc/testsuite/rust/compile/macros/mbe/macro20.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/macros/mbe/macro23.rs b/gcc/testsuite/rust/compile/macros/mbe/macro23.rs
index a6a2afdad076..3add715deb53 100644
--- a/gcc/testsuite/rust/compile/macros/mbe/macro23.rs
+++ b/gcc/testsuite/rust/compile/macros/mbe/macro23.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/macros/mbe/macro40.rs b/gcc/testsuite/rust/compile/macros/mbe/macro40.rs
index f9d048e8ab1d..39cbf5a737e0 100644
--- a/gcc/testsuite/rust/compile/macros/mbe/macro40.rs
+++ b/gcc/testsuite/rust/compile/macros/mbe/macro40.rs
@@ -1,5 +1,6 @@
 // { dg-additional-options "-w" }
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/macros/mbe/macro49.rs b/gcc/testsuite/rust/compile/macros/mbe/macro49.rs
index 9d63ff1e627d..850cf44d4192 100644
--- a/gcc/testsuite/rust/compile/macros/mbe/macro49.rs
+++ b/gcc/testsuite/rust/compile/macros/mbe/macro49.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/macros/mbe/macro54.rs b/gcc/testsuite/rust/compile/macros/mbe/macro54.rs
index d3b3f806a6a0..1cc4b3d542cf 100644
--- a/gcc/testsuite/rust/compile/macros/mbe/macro54.rs
+++ b/gcc/testsuite/rust/compile/macros/mbe/macro54.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/multiple_bindings1.rs b/gcc/testsuite/rust/compile/multiple_bindings1.rs
index 8a2e18c27b1b..c433a0dd292e 100644
--- a/gcc/testsuite/rust/compile/multiple_bindings1.rs
+++ b/gcc/testsuite/rust/compile/multiple_bindings1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/name_resolution2.rs b/gcc/testsuite/rust/compile/name_resolution2.rs
index 564c5d20ea5d..997bf55ca674 100644
--- a/gcc/testsuite/rust/compile/name_resolution2.rs
+++ b/gcc/testsuite/rust/compile/name_resolution2.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/name_resolution4.rs b/gcc/testsuite/rust/compile/name_resolution4.rs
index 0fc72f601c78..2da1aaeaa581 100644
--- a/gcc/testsuite/rust/compile/name_resolution4.rs
+++ b/gcc/testsuite/rust/compile/name_resolution4.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/nested_generic.rs b/gcc/testsuite/rust/compile/nested_generic.rs
index 322b3c50afb4..b7dae27bf5a6 100644
--- a/gcc/testsuite/rust/compile/nested_generic.rs
+++ b/gcc/testsuite/rust/compile/nested_generic.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/parse_associated_type_as_generic_arg.rs b/gcc/testsuite/rust/compile/parse_associated_type_as_generic_arg.rs
index ba1042a9bbe8..9190c4004e62 100644
--- a/gcc/testsuite/rust/compile/parse_associated_type_as_generic_arg.rs
+++ b/gcc/testsuite/rust/compile/parse_associated_type_as_generic_arg.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/parse_associated_type_as_generic_arg2.rs b/gcc/testsuite/rust/compile/parse_associated_type_as_generic_arg2.rs
index a2662c25e218..c50823bc5c1d 100644
--- a/gcc/testsuite/rust/compile/parse_associated_type_as_generic_arg2.rs
+++ b/gcc/testsuite/rust/compile/parse_associated_type_as_generic_arg2.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/parse_associated_type_as_generic_arg3.rs b/gcc/testsuite/rust/compile/parse_associated_type_as_generic_arg3.rs
index b4342e8c4cba..fa65b55c13cd 100644
--- a/gcc/testsuite/rust/compile/parse_associated_type_as_generic_arg3.rs
+++ b/gcc/testsuite/rust/compile/parse_associated_type_as_generic_arg3.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/parse_closure_bind.rs b/gcc/testsuite/rust/compile/parse_closure_bind.rs
index 1e08197a5fd0..45138466d61c 100644
--- a/gcc/testsuite/rust/compile/parse_closure_bind.rs
+++ b/gcc/testsuite/rust/compile/parse_closure_bind.rs
@@ -1,5 +1,6 @@
 // { dg-additional-options "-frust-compile-until=typecheck" }
 // TODO: this should typecheck
+#![feature(lang_items)]
 
 #[lang = "sized"]
 trait Sized {}
diff --git a/gcc/testsuite/rust/compile/parse_complex_generic_application.rs b/gcc/testsuite/rust/compile/parse_complex_generic_application.rs
index 02877dd727ed..b678cb219cde 100644
--- a/gcc/testsuite/rust/compile/parse_complex_generic_application.rs
+++ b/gcc/testsuite/rust/compile/parse_complex_generic_application.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/parse_complex_generic_application2.rs b/gcc/testsuite/rust/compile/parse_complex_generic_application2.rs
index 5ebc94f1f989..41ce21a49076 100644
--- a/gcc/testsuite/rust/compile/parse_complex_generic_application2.rs
+++ b/gcc/testsuite/rust/compile/parse_complex_generic_application2.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/path_as_generic_arg.rs b/gcc/testsuite/rust/compile/path_as_generic_arg.rs
index 21baf8000e71..aff4ce2793d5 100644
--- a/gcc/testsuite/rust/compile/path_as_generic_arg.rs
+++ b/gcc/testsuite/rust/compile/path_as_generic_arg.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/privacy4.rs b/gcc/testsuite/rust/compile/privacy4.rs
index 7865f6a3d479..5da43ffef75a 100644
--- a/gcc/testsuite/rust/compile/privacy4.rs
+++ b/gcc/testsuite/rust/compile/privacy4.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/privacy6.rs b/gcc/testsuite/rust/compile/privacy6.rs
index e1e0fac282b4..72d1a3b4f339 100644
--- a/gcc/testsuite/rust/compile/privacy6.rs
+++ b/gcc/testsuite/rust/compile/privacy6.rs
@@ -1,5 +1,6 @@
 // { dg-additional-options "-w" }
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/silly-order-bug.rs b/gcc/testsuite/rust/compile/silly-order-bug.rs
index 0d9cf1d8a884..cdc8b2f8571b 100644
--- a/gcc/testsuite/rust/compile/silly-order-bug.rs
+++ b/gcc/testsuite/rust/compile/silly-order-bug.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/sizeof-stray-infer-var-bug.rs b/gcc/testsuite/rust/compile/sizeof-stray-infer-var-bug.rs
index c46a97d1539b..7377a26d7353 100644
--- a/gcc/testsuite/rust/compile/sizeof-stray-infer-var-bug.rs
+++ b/gcc/testsuite/rust/compile/sizeof-stray-infer-var-bug.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/stmt_with_block_dot.rs b/gcc/testsuite/rust/compile/stmt_with_block_dot.rs
index c7037af8cd4e..5a3721e5662b 100644
--- a/gcc/testsuite/rust/compile/stmt_with_block_dot.rs
+++ b/gcc/testsuite/rust/compile/stmt_with_block_dot.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/structural-eq-peq.rs b/gcc/testsuite/rust/compile/structural-eq-peq.rs
index d04c295037f5..9bdc98d3d464 100644
--- a/gcc/testsuite/rust/compile/structural-eq-peq.rs
+++ b/gcc/testsuite/rust/compile/structural-eq-peq.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "structural_peq"]
 pub trait StructuralPartialEq {
     // Empty.
diff --git a/gcc/testsuite/rust/compile/torture/associated_types1.rs b/gcc/testsuite/rust/compile/torture/associated_types1.rs
index 2be703722c2e..4fc76af6ab9c 100644
--- a/gcc/testsuite/rust/compile/torture/associated_types1.rs
+++ b/gcc/testsuite/rust/compile/torture/associated_types1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/forward_decl_5.rs b/gcc/testsuite/rust/compile/torture/forward_decl_5.rs
index 670ab0a799fb..9d0660cc2f71 100644
--- a/gcc/testsuite/rust/compile/torture/forward_decl_5.rs
+++ b/gcc/testsuite/rust/compile/torture/forward_decl_5.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics1.rs b/gcc/testsuite/rust/compile/torture/generics1.rs
index b32eddd6c482..1d4c0f223848 100644
--- a/gcc/testsuite/rust/compile/torture/generics1.rs
+++ b/gcc/testsuite/rust/compile/torture/generics1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics10.rs b/gcc/testsuite/rust/compile/torture/generics10.rs
index 1a17e842a0dc..af12d7d328d3 100644
--- a/gcc/testsuite/rust/compile/torture/generics10.rs
+++ b/gcc/testsuite/rust/compile/torture/generics10.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics11.rs b/gcc/testsuite/rust/compile/torture/generics11.rs
index 9d5e719d774f..0e2939f7d4f3 100644
--- a/gcc/testsuite/rust/compile/torture/generics11.rs
+++ b/gcc/testsuite/rust/compile/torture/generics11.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics12.rs b/gcc/testsuite/rust/compile/torture/generics12.rs
index 9347b24d2d41..cf841dd1874e 100644
--- a/gcc/testsuite/rust/compile/torture/generics12.rs
+++ b/gcc/testsuite/rust/compile/torture/generics12.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics13.rs b/gcc/testsuite/rust/compile/torture/generics13.rs
index 00b26ec0968c..b83521f77fee 100644
--- a/gcc/testsuite/rust/compile/torture/generics13.rs
+++ b/gcc/testsuite/rust/compile/torture/generics13.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics14.rs b/gcc/testsuite/rust/compile/torture/generics14.rs
index 5be39ebff91c..bf5b295546da 100644
--- a/gcc/testsuite/rust/compile/torture/generics14.rs
+++ b/gcc/testsuite/rust/compile/torture/generics14.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics15.rs b/gcc/testsuite/rust/compile/torture/generics15.rs
index 2b1f31c0217e..ab65007b7a2d 100644
--- a/gcc/testsuite/rust/compile/torture/generics15.rs
+++ b/gcc/testsuite/rust/compile/torture/generics15.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics16.rs b/gcc/testsuite/rust/compile/torture/generics16.rs
index a9fa2ebdf0bc..0701c942afa5 100644
--- a/gcc/testsuite/rust/compile/torture/generics16.rs
+++ b/gcc/testsuite/rust/compile/torture/generics16.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics17.rs b/gcc/testsuite/rust/compile/torture/generics17.rs
index 9a04158e4c95..a52de9b0077b 100644
--- a/gcc/testsuite/rust/compile/torture/generics17.rs
+++ b/gcc/testsuite/rust/compile/torture/generics17.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics18.rs b/gcc/testsuite/rust/compile/torture/generics18.rs
index cb7b1fa7404d..8a239f2ea333 100644
--- a/gcc/testsuite/rust/compile/torture/generics18.rs
+++ b/gcc/testsuite/rust/compile/torture/generics18.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics19.rs b/gcc/testsuite/rust/compile/torture/generics19.rs
index c98599fffdac..4b372b61a489 100644
--- a/gcc/testsuite/rust/compile/torture/generics19.rs
+++ b/gcc/testsuite/rust/compile/torture/generics19.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics2.rs b/gcc/testsuite/rust/compile/torture/generics2.rs
index e720b4221497..61fd57406a26 100644
--- a/gcc/testsuite/rust/compile/torture/generics2.rs
+++ b/gcc/testsuite/rust/compile/torture/generics2.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics20.rs b/gcc/testsuite/rust/compile/torture/generics20.rs
index 92b022e3746f..985189ed0e7f 100644
--- a/gcc/testsuite/rust/compile/torture/generics20.rs
+++ b/gcc/testsuite/rust/compile/torture/generics20.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics21.rs b/gcc/testsuite/rust/compile/torture/generics21.rs
index 1c74ea429991..2986e69aedf9 100644
--- a/gcc/testsuite/rust/compile/torture/generics21.rs
+++ b/gcc/testsuite/rust/compile/torture/generics21.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics22.rs b/gcc/testsuite/rust/compile/torture/generics22.rs
index b838e6e8262c..b5c5f9a003e7 100644
--- a/gcc/testsuite/rust/compile/torture/generics22.rs
+++ b/gcc/testsuite/rust/compile/torture/generics22.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics23.rs b/gcc/testsuite/rust/compile/torture/generics23.rs
index bf4dfb59f6bb..d0da16f6719a 100644
--- a/gcc/testsuite/rust/compile/torture/generics23.rs
+++ b/gcc/testsuite/rust/compile/torture/generics23.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics24.rs b/gcc/testsuite/rust/compile/torture/generics24.rs
index ce782c0e9876..8655ca50988c 100644
--- a/gcc/testsuite/rust/compile/torture/generics24.rs
+++ b/gcc/testsuite/rust/compile/torture/generics24.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics25.rs b/gcc/testsuite/rust/compile/torture/generics25.rs
index 4fe952a5da17..a711e2144bd2 100644
--- a/gcc/testsuite/rust/compile/torture/generics25.rs
+++ b/gcc/testsuite/rust/compile/torture/generics25.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics26.rs b/gcc/testsuite/rust/compile/torture/generics26.rs
index 0111add4138a..3a5dcac49e28 100644
--- a/gcc/testsuite/rust/compile/torture/generics26.rs
+++ b/gcc/testsuite/rust/compile/torture/generics26.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics27.rs b/gcc/testsuite/rust/compile/torture/generics27.rs
index c4ca4db81e01..db8fe765ac33 100644
--- a/gcc/testsuite/rust/compile/torture/generics27.rs
+++ b/gcc/testsuite/rust/compile/torture/generics27.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics28.rs b/gcc/testsuite/rust/compile/torture/generics28.rs
index c1ffd9c245fb..f815ef5d2a62 100644
--- a/gcc/testsuite/rust/compile/torture/generics28.rs
+++ b/gcc/testsuite/rust/compile/torture/generics28.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics29.rs b/gcc/testsuite/rust/compile/torture/generics29.rs
index baf53e4347f0..4a35b3b41137 100644
--- a/gcc/testsuite/rust/compile/torture/generics29.rs
+++ b/gcc/testsuite/rust/compile/torture/generics29.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics3.rs b/gcc/testsuite/rust/compile/torture/generics3.rs
index 4c5dabcbd8bc..ae12d007dca4 100644
--- a/gcc/testsuite/rust/compile/torture/generics3.rs
+++ b/gcc/testsuite/rust/compile/torture/generics3.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics30.rs b/gcc/testsuite/rust/compile/torture/generics30.rs
index a84f140e1fdb..f592e774c693 100644
--- a/gcc/testsuite/rust/compile/torture/generics30.rs
+++ b/gcc/testsuite/rust/compile/torture/generics30.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics31.rs b/gcc/testsuite/rust/compile/torture/generics31.rs
index f8e2f36ef734..a393a4c3bb6c 100644
--- a/gcc/testsuite/rust/compile/torture/generics31.rs
+++ b/gcc/testsuite/rust/compile/torture/generics31.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics32.rs b/gcc/testsuite/rust/compile/torture/generics32.rs
index 49c4539d91d7..f332a776595a 100644
--- a/gcc/testsuite/rust/compile/torture/generics32.rs
+++ b/gcc/testsuite/rust/compile/torture/generics32.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics4.rs b/gcc/testsuite/rust/compile/torture/generics4.rs
index 54bdf56b63fa..3d4875b9f64c 100644
--- a/gcc/testsuite/rust/compile/torture/generics4.rs
+++ b/gcc/testsuite/rust/compile/torture/generics4.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics5.rs b/gcc/testsuite/rust/compile/torture/generics5.rs
index df27fdd8f6eb..3fcf13be08b0 100644
--- a/gcc/testsuite/rust/compile/torture/generics5.rs
+++ b/gcc/testsuite/rust/compile/torture/generics5.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics6.rs b/gcc/testsuite/rust/compile/torture/generics6.rs
index 16b85fbcb189..79d1ab8c361e 100644
--- a/gcc/testsuite/rust/compile/torture/generics6.rs
+++ b/gcc/testsuite/rust/compile/torture/generics6.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics7.rs b/gcc/testsuite/rust/compile/torture/generics7.rs
index 66454d6166dc..0eb1db18c9c8 100644
--- a/gcc/testsuite/rust/compile/torture/generics7.rs
+++ b/gcc/testsuite/rust/compile/torture/generics7.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics8.rs b/gcc/testsuite/rust/compile/torture/generics8.rs
index bc6d09b9919c..b46b1a28886d 100644
--- a/gcc/testsuite/rust/compile/torture/generics8.rs
+++ b/gcc/testsuite/rust/compile/torture/generics8.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/generics9.rs b/gcc/testsuite/rust/compile/torture/generics9.rs
index 3d9d748ef98c..fa926eed92b1 100644
--- a/gcc/testsuite/rust/compile/torture/generics9.rs
+++ b/gcc/testsuite/rust/compile/torture/generics9.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/intrinsics-2.rs b/gcc/testsuite/rust/compile/torture/intrinsics-2.rs
index a6cd8f8553f4..23151b14de5d 100644
--- a/gcc/testsuite/rust/compile/torture/intrinsics-2.rs
+++ b/gcc/testsuite/rust/compile/torture/intrinsics-2.rs
@@ -2,6 +2,7 @@
 
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/intrinsics-4.rs b/gcc/testsuite/rust/compile/torture/intrinsics-4.rs
index 3d26e999b9e9..51fc3c1a76c1 100644
--- a/gcc/testsuite/rust/compile/torture/intrinsics-4.rs
+++ b/gcc/testsuite/rust/compile/torture/intrinsics-4.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/intrinsics-5.rs b/gcc/testsuite/rust/compile/torture/intrinsics-5.rs
index 7a62cca280ca..a015c2a17844 100644
--- a/gcc/testsuite/rust/compile/torture/intrinsics-5.rs
+++ b/gcc/testsuite/rust/compile/torture/intrinsics-5.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/intrinsics-6.rs b/gcc/testsuite/rust/compile/torture/intrinsics-6.rs
index 0e2634592379..12821a06e4e2 100644
--- a/gcc/testsuite/rust/compile/torture/intrinsics-6.rs
+++ b/gcc/testsuite/rust/compile/torture/intrinsics-6.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/intrinsics-7.rs b/gcc/testsuite/rust/compile/torture/intrinsics-7.rs
index 754aacb3449e..6dc9187c483c 100644
--- a/gcc/testsuite/rust/compile/torture/intrinsics-7.rs
+++ b/gcc/testsuite/rust/compile/torture/intrinsics-7.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/intrinsics-8.rs b/gcc/testsuite/rust/compile/torture/intrinsics-8.rs
index b9bd83c76240..22b101257cba 100644
--- a/gcc/testsuite/rust/compile/torture/intrinsics-8.rs
+++ b/gcc/testsuite/rust/compile/torture/intrinsics-8.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/issue-1024.rs b/gcc/testsuite/rust/compile/torture/issue-1024.rs
index 819e329058c5..c7325651e693 100644
--- a/gcc/testsuite/rust/compile/torture/issue-1024.rs
+++ b/gcc/testsuite/rust/compile/torture/issue-1024.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/issue-1075.rs b/gcc/testsuite/rust/compile/torture/issue-1075.rs
index d23774b2c0bb..558467862b53 100644
--- a/gcc/testsuite/rust/compile/torture/issue-1075.rs
+++ b/gcc/testsuite/rust/compile/torture/issue-1075.rs
@@ -1,6 +1,7 @@
 // { dg-additional-options "-w" }
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/issue-1432.rs b/gcc/testsuite/rust/compile/torture/issue-1432.rs
index 5b526fdd52db..df1b52738ce3 100644
--- a/gcc/testsuite/rust/compile/torture/issue-1432.rs
+++ b/gcc/testsuite/rust/compile/torture/issue-1432.rs
@@ -1,6 +1,7 @@
 // { dg-additional-options "-w" }
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/issue-1555.rs b/gcc/testsuite/rust/compile/torture/issue-1555.rs
index bee8952f3683..b2f675a79488 100644
--- a/gcc/testsuite/rust/compile/torture/issue-1555.rs
+++ b/gcc/testsuite/rust/compile/torture/issue-1555.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/issue-368.rs b/gcc/testsuite/rust/compile/torture/issue-368.rs
index 775e70d9d23e..a657a7c52bcf 100644
--- a/gcc/testsuite/rust/compile/torture/issue-368.rs
+++ b/gcc/testsuite/rust/compile/torture/issue-368.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/issue-808.rs b/gcc/testsuite/rust/compile/torture/issue-808.rs
index 4186d54f4bc1..f739d22e1c3e 100644
--- a/gcc/testsuite/rust/compile/torture/issue-808.rs
+++ b/gcc/testsuite/rust/compile/torture/issue-808.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/issue-862.rs b/gcc/testsuite/rust/compile/torture/issue-862.rs
index d9ac91246018..88d6d652070c 100644
--- a/gcc/testsuite/rust/compile/torture/issue-862.rs
+++ b/gcc/testsuite/rust/compile/torture/issue-862.rs
@@ -1,5 +1,6 @@
 // { dg-additional-options "-w" }
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/issue-893-2.rs b/gcc/testsuite/rust/compile/torture/issue-893-2.rs
index 3df27b8335ef..2e4ec14b6196 100644
--- a/gcc/testsuite/rust/compile/torture/issue-893-2.rs
+++ b/gcc/testsuite/rust/compile/torture/issue-893-2.rs
@@ -1,4 +1,5 @@
 // { dg-additional-options "-w" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/issue-893.rs b/gcc/testsuite/rust/compile/torture/issue-893.rs
index f96b5c346432..bd77c8dc41bf 100644
--- a/gcc/testsuite/rust/compile/torture/issue-893.rs
+++ b/gcc/testsuite/rust/compile/torture/issue-893.rs
@@ -1,4 +1,5 @@
 // { dg-additional-options "-w" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/must_use2.rs b/gcc/testsuite/rust/compile/torture/must_use2.rs
index cf6643eec25d..9c9a1a7b3f13 100644
--- a/gcc/testsuite/rust/compile/torture/must_use2.rs
+++ b/gcc/testsuite/rust/compile/torture/must_use2.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/nested_fn2.rs b/gcc/testsuite/rust/compile/torture/nested_fn2.rs
index ad7a10b0a82e..57cee8a4a8a4 100644
--- a/gcc/testsuite/rust/compile/torture/nested_fn2.rs
+++ b/gcc/testsuite/rust/compile/torture/nested_fn2.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/phantom_data.rs b/gcc/testsuite/rust/compile/torture/phantom_data.rs
index d6c5adcf89a2..a5b70a55f042 100644
--- a/gcc/testsuite/rust/compile/torture/phantom_data.rs
+++ b/gcc/testsuite/rust/compile/torture/phantom_data.rs
@@ -1,4 +1,5 @@
 // { dg-options "-w" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/range-lang-item1.rs b/gcc/testsuite/rust/compile/torture/range-lang-item1.rs
index 604fee8e3285..db10f85265e8 100644
--- a/gcc/testsuite/rust/compile/torture/range-lang-item1.rs
+++ b/gcc/testsuite/rust/compile/torture/range-lang-item1.rs
@@ -1,4 +1,5 @@
 // { dg-additional-options "-w" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits1.rs b/gcc/testsuite/rust/compile/torture/traits1.rs
index 8929501de6f5..6fe943c8948a 100644
--- a/gcc/testsuite/rust/compile/torture/traits1.rs
+++ b/gcc/testsuite/rust/compile/torture/traits1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits10.rs b/gcc/testsuite/rust/compile/torture/traits10.rs
index 4cf36e3c6f1c..47104453b46b 100644
--- a/gcc/testsuite/rust/compile/torture/traits10.rs
+++ b/gcc/testsuite/rust/compile/torture/traits10.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits11.rs b/gcc/testsuite/rust/compile/torture/traits11.rs
index 02383a5610aa..1cab51faf72d 100644
--- a/gcc/testsuite/rust/compile/torture/traits11.rs
+++ b/gcc/testsuite/rust/compile/torture/traits11.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits12.rs b/gcc/testsuite/rust/compile/torture/traits12.rs
index 8648022b8fe3..3e340eb273f6 100644
--- a/gcc/testsuite/rust/compile/torture/traits12.rs
+++ b/gcc/testsuite/rust/compile/torture/traits12.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits13.rs b/gcc/testsuite/rust/compile/torture/traits13.rs
index 5d9c81943d9c..ce70a28d344c 100644
--- a/gcc/testsuite/rust/compile/torture/traits13.rs
+++ b/gcc/testsuite/rust/compile/torture/traits13.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits14.rs b/gcc/testsuite/rust/compile/torture/traits14.rs
index ab546a88fae7..2996ecf1ab1e 100644
--- a/gcc/testsuite/rust/compile/torture/traits14.rs
+++ b/gcc/testsuite/rust/compile/torture/traits14.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits15.rs b/gcc/testsuite/rust/compile/torture/traits15.rs
index c1863a8a2f9b..c875577ef6f6 100644
--- a/gcc/testsuite/rust/compile/torture/traits15.rs
+++ b/gcc/testsuite/rust/compile/torture/traits15.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits16.rs b/gcc/testsuite/rust/compile/torture/traits16.rs
index 8c8e682e6c16..7dc546c4c990 100644
--- a/gcc/testsuite/rust/compile/torture/traits16.rs
+++ b/gcc/testsuite/rust/compile/torture/traits16.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits17.rs b/gcc/testsuite/rust/compile/torture/traits17.rs
index 268c2bd50c55..9ee267eb9e21 100644
--- a/gcc/testsuite/rust/compile/torture/traits17.rs
+++ b/gcc/testsuite/rust/compile/torture/traits17.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits18.rs b/gcc/testsuite/rust/compile/torture/traits18.rs
index 512152e9fdf3..bd32f70db0cf 100644
--- a/gcc/testsuite/rust/compile/torture/traits18.rs
+++ b/gcc/testsuite/rust/compile/torture/traits18.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits19.rs b/gcc/testsuite/rust/compile/torture/traits19.rs
index 4be898d40240..bd1a6e28bcf7 100644
--- a/gcc/testsuite/rust/compile/torture/traits19.rs
+++ b/gcc/testsuite/rust/compile/torture/traits19.rs
@@ -1,4 +1,5 @@
 // { dg-additional-options "-w" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits2.rs b/gcc/testsuite/rust/compile/torture/traits2.rs
index a9dca948d1b4..f0a33d9e2c31 100644
--- a/gcc/testsuite/rust/compile/torture/traits2.rs
+++ b/gcc/testsuite/rust/compile/torture/traits2.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits3.rs b/gcc/testsuite/rust/compile/torture/traits3.rs
index dad6ddab05ab..d06a68faf889 100644
--- a/gcc/testsuite/rust/compile/torture/traits3.rs
+++ b/gcc/testsuite/rust/compile/torture/traits3.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits4.rs b/gcc/testsuite/rust/compile/torture/traits4.rs
index 49c4db2d34a6..716d657e14ac 100644
--- a/gcc/testsuite/rust/compile/torture/traits4.rs
+++ b/gcc/testsuite/rust/compile/torture/traits4.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits5.rs b/gcc/testsuite/rust/compile/torture/traits5.rs
index c60a2597418b..86e83e5d7ded 100644
--- a/gcc/testsuite/rust/compile/torture/traits5.rs
+++ b/gcc/testsuite/rust/compile/torture/traits5.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits6.rs b/gcc/testsuite/rust/compile/torture/traits6.rs
index f11735324f2f..f1c4e84de2d8 100644
--- a/gcc/testsuite/rust/compile/torture/traits6.rs
+++ b/gcc/testsuite/rust/compile/torture/traits6.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits7.rs b/gcc/testsuite/rust/compile/torture/traits7.rs
index 545fd39416ac..928dd627d1eb 100644
--- a/gcc/testsuite/rust/compile/torture/traits7.rs
+++ b/gcc/testsuite/rust/compile/torture/traits7.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits8.rs b/gcc/testsuite/rust/compile/torture/traits8.rs
index cc0875bd0757..f2515e891fbf 100644
--- a/gcc/testsuite/rust/compile/torture/traits8.rs
+++ b/gcc/testsuite/rust/compile/torture/traits8.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/traits9.rs b/gcc/testsuite/rust/compile/torture/traits9.rs
index 3a7c37fcbb60..8015a35c322e 100644
--- a/gcc/testsuite/rust/compile/torture/traits9.rs
+++ b/gcc/testsuite/rust/compile/torture/traits9.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/transmute-size-check-1.rs b/gcc/testsuite/rust/compile/torture/transmute-size-check-1.rs
index 7b987797d493..4de1843a9e12 100644
--- a/gcc/testsuite/rust/compile/torture/transmute-size-check-1.rs
+++ b/gcc/testsuite/rust/compile/torture/transmute-size-check-1.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/transmute1.rs b/gcc/testsuite/rust/compile/torture/transmute1.rs
index be9fb1de56da..fc1d94a3bb00 100644
--- a/gcc/testsuite/rust/compile/torture/transmute1.rs
+++ b/gcc/testsuite/rust/compile/torture/transmute1.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/uninit-intrinsic-1.rs b/gcc/testsuite/rust/compile/torture/uninit-intrinsic-1.rs
index af1cb541fc3f..50083e596ac2 100644
--- a/gcc/testsuite/rust/compile/torture/uninit-intrinsic-1.rs
+++ b/gcc/testsuite/rust/compile/torture/uninit-intrinsic-1.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/torture/utf8_identifiers.rs b/gcc/testsuite/rust/compile/torture/utf8_identifiers.rs
index 696fcc0a3d83..f7d6b3771a73 100644
--- a/gcc/testsuite/rust/compile/torture/utf8_identifiers.rs
+++ b/gcc/testsuite/rust/compile/torture/utf8_identifiers.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/traits1.rs b/gcc/testsuite/rust/compile/traits1.rs
index 779662c3f418..d67a6cd13736 100644
--- a/gcc/testsuite/rust/compile/traits1.rs
+++ b/gcc/testsuite/rust/compile/traits1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/traits10.rs b/gcc/testsuite/rust/compile/traits10.rs
index da6c15553049..5e6e7e2cbef3 100644
--- a/gcc/testsuite/rust/compile/traits10.rs
+++ b/gcc/testsuite/rust/compile/traits10.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/traits11.rs b/gcc/testsuite/rust/compile/traits11.rs
index ac8ccdf5886b..6aa860b74129 100644
--- a/gcc/testsuite/rust/compile/traits11.rs
+++ b/gcc/testsuite/rust/compile/traits11.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/traits12.rs b/gcc/testsuite/rust/compile/traits12.rs
index b194e073a911..99f10a2206dd 100644
--- a/gcc/testsuite/rust/compile/traits12.rs
+++ b/gcc/testsuite/rust/compile/traits12.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/traits2.rs b/gcc/testsuite/rust/compile/traits2.rs
index a76f4c02ffc8..857ab28688c0 100644
--- a/gcc/testsuite/rust/compile/traits2.rs
+++ b/gcc/testsuite/rust/compile/traits2.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/traits3.rs b/gcc/testsuite/rust/compile/traits3.rs
index 119132f80e88..c4e3185f59c8 100644
--- a/gcc/testsuite/rust/compile/traits3.rs
+++ b/gcc/testsuite/rust/compile/traits3.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/traits4.rs b/gcc/testsuite/rust/compile/traits4.rs
index 4388b5e1cb5f..11a0c78c1675 100644
--- a/gcc/testsuite/rust/compile/traits4.rs
+++ b/gcc/testsuite/rust/compile/traits4.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/traits5.rs b/gcc/testsuite/rust/compile/traits5.rs
index 4e9dcc167b7b..5bb6793b93b9 100644
--- a/gcc/testsuite/rust/compile/traits5.rs
+++ b/gcc/testsuite/rust/compile/traits5.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/traits6.rs b/gcc/testsuite/rust/compile/traits6.rs
index d081dd11e10d..b4922ccad030 100644
--- a/gcc/testsuite/rust/compile/traits6.rs
+++ b/gcc/testsuite/rust/compile/traits6.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/traits7.rs b/gcc/testsuite/rust/compile/traits7.rs
index 68f3f38f97bd..62e197e7d0ee 100644
--- a/gcc/testsuite/rust/compile/traits7.rs
+++ b/gcc/testsuite/rust/compile/traits7.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/traits8.rs b/gcc/testsuite/rust/compile/traits8.rs
index ccba9fad5dbe..117ba542c1f9 100644
--- a/gcc/testsuite/rust/compile/traits8.rs
+++ b/gcc/testsuite/rust/compile/traits8.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/traits9.rs b/gcc/testsuite/rust/compile/traits9.rs
index f4308e8ccc17..334124436230 100644
--- a/gcc/testsuite/rust/compile/traits9.rs
+++ b/gcc/testsuite/rust/compile/traits9.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/try-expr1.rs b/gcc/testsuite/rust/compile/try-expr1.rs
index f1a78657e858..f6e460e4311f 100644
--- a/gcc/testsuite/rust/compile/try-expr1.rs
+++ b/gcc/testsuite/rust/compile/try-expr1.rs
@@ -1,4 +1,5 @@
 // { dg-additional-options "-frust-compile-until=typecheck" }
+#![feature(lang_items)]
 
 #[lang = "sized"]
 trait Sized {}
diff --git a/gcc/testsuite/rust/compile/try-trait.rs b/gcc/testsuite/rust/compile/try-trait.rs
index 9ec135dcd56c..3c0a88c05e8d 100644
--- a/gcc/testsuite/rust/compile/try-trait.rs
+++ b/gcc/testsuite/rust/compile/try-trait.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/try_block1.rs b/gcc/testsuite/rust/compile/try_block1.rs
index 7ae053683e94..9ace0296ecfa 100644
--- a/gcc/testsuite/rust/compile/try_block1.rs
+++ b/gcc/testsuite/rust/compile/try_block1.rs
@@ -1,4 +1,5 @@
 // { dg-additional-options "-frust-edition=2018" }
+#![feature(lang_items)]
 
 #[lang = "sized"]
 trait Sized {}
diff --git a/gcc/testsuite/rust/compile/type-bindings1.rs b/gcc/testsuite/rust/compile/type-bindings1.rs
index ef0b47128dfa..fabb4871187a 100644
--- a/gcc/testsuite/rust/compile/type-bindings1.rs
+++ b/gcc/testsuite/rust/compile/type-bindings1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/unconstrained_type_param.rs b/gcc/testsuite/rust/compile/unconstrained_type_param.rs
index 60554dac0e01..dccfc9ed9190 100644
--- a/gcc/testsuite/rust/compile/unconstrained_type_param.rs
+++ b/gcc/testsuite/rust/compile/unconstrained_type_param.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/unify-errors1.rs b/gcc/testsuite/rust/compile/unify-errors1.rs
index 0fe95efd0d7f..e10105950aa4 100644
--- a/gcc/testsuite/rust/compile/unify-errors1.rs
+++ b/gcc/testsuite/rust/compile/unify-errors1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/unsafe10.rs b/gcc/testsuite/rust/compile/unsafe10.rs
index 5861c15cd71d..12c0483ce904 100644
--- a/gcc/testsuite/rust/compile/unsafe10.rs
+++ b/gcc/testsuite/rust/compile/unsafe10.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/v0-mangle1.rs b/gcc/testsuite/rust/compile/v0-mangle1.rs
index 04c546e351af..b4a8c131382a 100644
--- a/gcc/testsuite/rust/compile/v0-mangle1.rs
+++ b/gcc/testsuite/rust/compile/v0-mangle1.rs
@@ -1,4 +1,5 @@
 // { dg-additional-options -frust-mangling=v0 }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/v0-mangle2.rs b/gcc/testsuite/rust/compile/v0-mangle2.rs
index d092dcc7a196..4378dd874f73 100644
--- a/gcc/testsuite/rust/compile/v0-mangle2.rs
+++ b/gcc/testsuite/rust/compile/v0-mangle2.rs
@@ -1,4 +1,5 @@
 // { dg-additional-options -frust-mangling=v0 }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/compile/while_let1.rs b/gcc/testsuite/rust/compile/while_let1.rs
index a3fa3053226a..03d84df98c91 100644
--- a/gcc/testsuite/rust/compile/while_let1.rs
+++ b/gcc/testsuite/rust/compile/while_let1.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 // use self::Ordering::*;
 // use Ordering::*;
 
diff --git a/gcc/testsuite/rust/execute/black_box.rs b/gcc/testsuite/rust/execute/black_box.rs
index 58d10a3e4209..8fa2ccefeb47 100644
--- a/gcc/testsuite/rust/execute/black_box.rs
+++ b/gcc/testsuite/rust/execute/black_box.rs
@@ -1,5 +1,5 @@
 /* { dg-output "Value is: 42\r*\n" } */
-#![feature(rustc_attrs)]
+#![feature(rustc_attrs, lang_items)]
 
 extern "C" {
     fn printf(s: *const i8, ...);
diff --git a/gcc/testsuite/rust/execute/torture/atomic_load.rs b/gcc/testsuite/rust/execute/torture/atomic_load.rs
index 11da84844945..c2727007d107 100644
--- a/gcc/testsuite/rust/execute/torture/atomic_load.rs
+++ b/gcc/testsuite/rust/execute/torture/atomic_load.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/atomic_store.rs b/gcc/testsuite/rust/execute/torture/atomic_store.rs
index 1b46678ba382..acf7c64c7f6e 100644
--- a/gcc/testsuite/rust/execute/torture/atomic_store.rs
+++ b/gcc/testsuite/rust/execute/torture/atomic_store.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/basic_partial_ord1.rs b/gcc/testsuite/rust/execute/torture/basic_partial_ord1.rs
index 0431629e9ea6..d51c95dc6998 100644
--- a/gcc/testsuite/rust/execute/torture/basic_partial_ord1.rs
+++ b/gcc/testsuite/rust/execute/torture/basic_partial_ord1.rs
@@ -1,4 +1,6 @@
 /* { dg-output "less\r*" }*/
+#![feature(lang_items)]
+
 mod core {
     mod option {
         pub enum Option<T> {
diff --git a/gcc/testsuite/rust/execute/torture/basic_partial_ord2.rs b/gcc/testsuite/rust/execute/torture/basic_partial_ord2.rs
index b6a96953d4a9..86c26df82e4f 100644
--- a/gcc/testsuite/rust/execute/torture/basic_partial_ord2.rs
+++ b/gcc/testsuite/rust/execute/torture/basic_partial_ord2.rs
@@ -1,5 +1,7 @@
 /* { dg-output "<><=>=\r*" } */
 /* { dg-options "-w" } */
+#![feature(lang_items)]
+
 mod core {
     mod option {
         pub enum Option<T> {
diff --git a/gcc/testsuite/rust/execute/torture/builtin_macro_option_env.rs b/gcc/testsuite/rust/execute/torture/builtin_macro_option_env.rs
index 56fbeaab602d..708c2aa1401c 100644
--- a/gcc/testsuite/rust/execute/torture/builtin_macro_option_env.rs
+++ b/gcc/testsuite/rust/execute/torture/builtin_macro_option_env.rs
@@ -1,7 +1,7 @@
 // { dg-output "VALUE\r*\nVALUE\r*\n" }
 // { dg-set-compiler-env-var ENV_MACRO_TEST "VALUE" }
 
-#![feature(rustc_attrs)]
+#![feature(rustc_attrs, lang_items)]
 
 #[rustc_builtin_macro]
 macro_rules! option_env {
diff --git a/gcc/testsuite/rust/execute/torture/closure1.rs b/gcc/testsuite/rust/execute/torture/closure1.rs
index e9564133b556..1a5e498246bf 100644
--- a/gcc/testsuite/rust/execute/torture/closure1.rs
+++ b/gcc/testsuite/rust/execute/torture/closure1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/closure2.rs b/gcc/testsuite/rust/execute/torture/closure2.rs
index deca7845f8b3..06f385fac3c1 100644
--- a/gcc/testsuite/rust/execute/torture/closure2.rs
+++ b/gcc/testsuite/rust/execute/torture/closure2.rs
@@ -1,4 +1,6 @@
 // { dg-output "3\r*\n" }
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/closure3.rs b/gcc/testsuite/rust/execute/torture/closure3.rs
index 98ec26143a38..e9c624497217 100644
--- a/gcc/testsuite/rust/execute/torture/closure3.rs
+++ b/gcc/testsuite/rust/execute/torture/closure3.rs
@@ -1,4 +1,6 @@
 // { dg-output "3\r*\n" }
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/closure4.rs b/gcc/testsuite/rust/execute/torture/closure4.rs
index 070177607896..3f845dcd5648 100644
--- a/gcc/testsuite/rust/execute/torture/closure4.rs
+++ b/gcc/testsuite/rust/execute/torture/closure4.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/coercion1.rs b/gcc/testsuite/rust/execute/torture/coercion1.rs
index 335f4962104b..e6511b9635b6 100644
--- a/gcc/testsuite/rust/execute/torture/coercion1.rs
+++ b/gcc/testsuite/rust/execute/torture/coercion1.rs
@@ -1,4 +1,6 @@
 /* { dg-output "123\r*\n123\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/coercion2.rs b/gcc/testsuite/rust/execute/torture/coercion2.rs
index 6be86020bdd7..cf316e40732c 100644
--- a/gcc/testsuite/rust/execute/torture/coercion2.rs
+++ b/gcc/testsuite/rust/execute/torture/coercion2.rs
@@ -1,4 +1,6 @@
 /* { dg-output "123\r*\n123\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/coercion3.rs b/gcc/testsuite/rust/execute/torture/coercion3.rs
index 0686056de4e8..a870beae00b9 100644
--- a/gcc/testsuite/rust/execute/torture/coercion3.rs
+++ b/gcc/testsuite/rust/execute/torture/coercion3.rs
@@ -1,4 +1,5 @@
 // { dg-output "123\r*\n" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/const-generics-1.rs b/gcc/testsuite/rust/execute/torture/const-generics-1.rs
index dbb7afe6835b..3ad1b3b69164 100644
--- a/gcc/testsuite/rust/execute/torture/const-generics-1.rs
+++ b/gcc/testsuite/rust/execute/torture/const-generics-1.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/const-generics-2.rs b/gcc/testsuite/rust/execute/torture/const-generics-2.rs
index cf92953a37ae..6ed5535876bd 100644
--- a/gcc/testsuite/rust/execute/torture/const-generics-2.rs
+++ b/gcc/testsuite/rust/execute/torture/const-generics-2.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/const-generics-3.rs b/gcc/testsuite/rust/execute/torture/const-generics-3.rs
index 53698bb2dd64..289b8654e992 100644
--- a/gcc/testsuite/rust/execute/torture/const-generics-3.rs
+++ b/gcc/testsuite/rust/execute/torture/const-generics-3.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/const-generics-4.rs b/gcc/testsuite/rust/execute/torture/const-generics-4.rs
index bf64f13e6545..9104f24d5748 100644
--- a/gcc/testsuite/rust/execute/torture/const-generics-4.rs
+++ b/gcc/testsuite/rust/execute/torture/const-generics-4.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/const-generics-5.rs b/gcc/testsuite/rust/execute/torture/const-generics-5.rs
index fd3c6a2ce151..91006edf2ffa 100644
--- a/gcc/testsuite/rust/execute/torture/const-generics-5.rs
+++ b/gcc/testsuite/rust/execute/torture/const-generics-5.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/const-generics-6.rs b/gcc/testsuite/rust/execute/torture/const-generics-6.rs
index 325b58e387d7..0aa7fae18319 100644
--- a/gcc/testsuite/rust/execute/torture/const-generics-6.rs
+++ b/gcc/testsuite/rust/execute/torture/const-generics-6.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/const-generics-7.rs b/gcc/testsuite/rust/execute/torture/const-generics-7.rs
index afba0329a706..c75d89747ece 100644
--- a/gcc/testsuite/rust/execute/torture/const-generics-7.rs
+++ b/gcc/testsuite/rust/execute/torture/const-generics-7.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/copy_nonoverlapping1.rs b/gcc/testsuite/rust/execute/torture/copy_nonoverlapping1.rs
index 15bb811773bd..662f8136554d 100644
--- a/gcc/testsuite/rust/execute/torture/copy_nonoverlapping1.rs
+++ b/gcc/testsuite/rust/execute/torture/copy_nonoverlapping1.rs
@@ -1,4 +1,5 @@
 #![feature(intrinsics)]
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/derive-default1.rs b/gcc/testsuite/rust/execute/torture/derive-default1.rs
index 4bcafa0fc44f..775f5be6e9bd 100644
--- a/gcc/testsuite/rust/execute/torture/derive-default1.rs
+++ b/gcc/testsuite/rust/execute/torture/derive-default1.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[derive(Default)]
 struct Foo { a: i32  }
 #[derive(Default)]
diff --git a/gcc/testsuite/rust/execute/torture/derive-partialeq1.rs b/gcc/testsuite/rust/execute/torture/derive-partialeq1.rs
index 67b2773e498f..442ee6725707 100644
--- a/gcc/testsuite/rust/execute/torture/derive-partialeq1.rs
+++ b/gcc/testsuite/rust/execute/torture/derive-partialeq1.rs
@@ -1,6 +1,6 @@
 // { dg-output "true\r*\nfalse\r*\nfalse\r*\n" }
 
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 #[lang = "sized"]
 trait Sized {}
diff --git a/gcc/testsuite/rust/execute/torture/derive-partialeq2.rs b/gcc/testsuite/rust/execute/torture/derive-partialeq2.rs
index e316017753a2..1f4c374d4e89 100644
--- a/gcc/testsuite/rust/execute/torture/derive-partialeq2.rs
+++ b/gcc/testsuite/rust/execute/torture/derive-partialeq2.rs
@@ -1,6 +1,6 @@
 // { dg-output "true\r*\nfalse\r*\nfalse\r*\nfalse\r*\nfalse\r*\n" }
 
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 pub mod core {
     pub mod intrinsics {
diff --git a/gcc/testsuite/rust/execute/torture/derive_clone_enum1.rs b/gcc/testsuite/rust/execute/torture/derive_clone_enum1.rs
index 542ecd83db04..28a120fd4d09 100644
--- a/gcc/testsuite/rust/execute/torture/derive_clone_enum1.rs
+++ b/gcc/testsuite/rust/execute/torture/derive_clone_enum1.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "clone"]
 trait Clone {
     pub fn clone(&self) -> Self;
diff --git a/gcc/testsuite/rust/execute/torture/derive_macro1.rs b/gcc/testsuite/rust/execute/torture/derive_macro1.rs
index 22cfaaae191c..780a30f597aa 100644
--- a/gcc/testsuite/rust/execute/torture/derive_macro1.rs
+++ b/gcc/testsuite/rust/execute/torture/derive_macro1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/derive_macro3.rs b/gcc/testsuite/rust/execute/torture/derive_macro3.rs
index 4138a5bf7e4c..e8fe94cfedd7 100644
--- a/gcc/testsuite/rust/execute/torture/derive_macro3.rs
+++ b/gcc/testsuite/rust/execute/torture/derive_macro3.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/derive_macro4.rs b/gcc/testsuite/rust/execute/torture/derive_macro4.rs
index 38c4808574a3..adeeb8db42c1 100644
--- a/gcc/testsuite/rust/execute/torture/derive_macro4.rs
+++ b/gcc/testsuite/rust/execute/torture/derive_macro4.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/enum_intrinsics1.rs b/gcc/testsuite/rust/execute/torture/enum_intrinsics1.rs
index c30bbd3d3856..66011b555fbb 100644
--- a/gcc/testsuite/rust/execute/torture/enum_intrinsics1.rs
+++ b/gcc/testsuite/rust/execute/torture/enum_intrinsics1.rs
@@ -1,6 +1,7 @@
 /* { dg-output "0\r*\n2\r*\n" } */
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/enum_intrinsics2.rs b/gcc/testsuite/rust/execute/torture/enum_intrinsics2.rs
index c1bae35deb2e..5f7d5ffeaeaf 100644
--- a/gcc/testsuite/rust/execute/torture/enum_intrinsics2.rs
+++ b/gcc/testsuite/rust/execute/torture/enum_intrinsics2.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/for-loop1.rs b/gcc/testsuite/rust/execute/torture/for-loop1.rs
index 334218927b13..e48a4b12400b 100644
--- a/gcc/testsuite/rust/execute/torture/for-loop1.rs
+++ b/gcc/testsuite/rust/execute/torture/for-loop1.rs
@@ -1,5 +1,5 @@
 // { dg-output "loop\r*\nloop\r*\n" }
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 pub use option::Option::{self, None, Some};
 pub use result::Result::{self, Err, Ok};
diff --git a/gcc/testsuite/rust/execute/torture/for-loop2.rs b/gcc/testsuite/rust/execute/torture/for-loop2.rs
index 4f5dfe1a0a26..022e9510378a 100644
--- a/gcc/testsuite/rust/execute/torture/for-loop2.rs
+++ b/gcc/testsuite/rust/execute/torture/for-loop2.rs
@@ -1,5 +1,5 @@
 // { dg-output "loop1\r*\nloop2\r*\n" }
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 pub use option::Option::{self, None, Some};
 pub use result::Result::{self, Err, Ok};
diff --git a/gcc/testsuite/rust/execute/torture/gat1.rs b/gcc/testsuite/rust/execute/torture/gat1.rs
index 8310a5883809..9a60986d945d 100644
--- a/gcc/testsuite/rust/execute/torture/gat1.rs
+++ b/gcc/testsuite/rust/execute/torture/gat1.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/impl_desugar-2.rs b/gcc/testsuite/rust/execute/torture/impl_desugar-2.rs
index c73ea34c6dab..d1d63ceda153 100644
--- a/gcc/testsuite/rust/execute/torture/impl_desugar-2.rs
+++ b/gcc/testsuite/rust/execute/torture/impl_desugar-2.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/impl_desugar.rs b/gcc/testsuite/rust/execute/torture/impl_desugar.rs
index 22d39519f305..77309de2e666 100644
--- a/gcc/testsuite/rust/execute/torture/impl_desugar.rs
+++ b/gcc/testsuite/rust/execute/torture/impl_desugar.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/impl_rpit1.rs b/gcc/testsuite/rust/execute/torture/impl_rpit1.rs
index 8ce5f21ef87e..9de4dff7678d 100644
--- a/gcc/testsuite/rust/execute/torture/impl_rpit1.rs
+++ b/gcc/testsuite/rust/execute/torture/impl_rpit1.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/impl_rpit2.rs b/gcc/testsuite/rust/execute/torture/impl_rpit2.rs
index f7cbbb668649..0f2e7e0d6336 100644
--- a/gcc/testsuite/rust/execute/torture/impl_rpit2.rs
+++ b/gcc/testsuite/rust/execute/torture/impl_rpit2.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/impl_rpit3.rs b/gcc/testsuite/rust/execute/torture/impl_rpit3.rs
index dd68eb29ef96..ec55f6af0cf5 100644
--- a/gcc/testsuite/rust/execute/torture/impl_rpit3.rs
+++ b/gcc/testsuite/rust/execute/torture/impl_rpit3.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/impl_trait1.rs b/gcc/testsuite/rust/execute/torture/impl_trait1.rs
index 33a5c8cf1dbb..e578ed869362 100644
--- a/gcc/testsuite/rust/execute/torture/impl_trait1.rs
+++ b/gcc/testsuite/rust/execute/torture/impl_trait1.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/impl_trait2.rs b/gcc/testsuite/rust/execute/torture/impl_trait2.rs
index 29f393d679d2..d13765e428ba 100644
--- a/gcc/testsuite/rust/execute/torture/impl_trait2.rs
+++ b/gcc/testsuite/rust/execute/torture/impl_trait2.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/impl_trait3.rs b/gcc/testsuite/rust/execute/torture/impl_trait3.rs
index c1cec07bc4cf..588b11d0935f 100644
--- a/gcc/testsuite/rust/execute/torture/impl_trait3.rs
+++ b/gcc/testsuite/rust/execute/torture/impl_trait3.rs
@@ -1,4 +1,5 @@
 /* { dg-output "Hello from Message\r*\n" } */
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/impl_trait4.rs b/gcc/testsuite/rust/execute/torture/impl_trait4.rs
index 67d00957e3d6..e054949b5584 100644
--- a/gcc/testsuite/rust/execute/torture/impl_trait4.rs
+++ b/gcc/testsuite/rust/execute/torture/impl_trait4.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/index1.rs b/gcc/testsuite/rust/execute/torture/index1.rs
index 19e58e32b16e..1071b35f2dea 100644
--- a/gcc/testsuite/rust/execute/torture/index1.rs
+++ b/gcc/testsuite/rust/execute/torture/index1.rs
@@ -1,4 +1,5 @@
 // { dg-additional-options "-w" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/issue-1120.rs b/gcc/testsuite/rust/execute/torture/issue-1120.rs
index 7dfa26fc14e9..d7ef483ff93d 100644
--- a/gcc/testsuite/rust/execute/torture/issue-1120.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-1120.rs
@@ -1,6 +1,7 @@
 // { dg-additional-options "-w" }
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/issue-1133.rs b/gcc/testsuite/rust/execute/torture/issue-1133.rs
index 29f532e5c96a..788b0ea08b8a 100644
--- a/gcc/testsuite/rust/execute/torture/issue-1133.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-1133.rs
@@ -1,6 +1,7 @@
 // { dg-additional-options "-w" }
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/issue-1198.rs b/gcc/testsuite/rust/execute/torture/issue-1198.rs
index d5c3d895783a..d50faba0fb0f 100644
--- a/gcc/testsuite/rust/execute/torture/issue-1198.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-1198.rs
@@ -1,4 +1,6 @@
 /* { dg-output "foo_deref\r*\nimm_deref\r*\n123\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/issue-1232.rs b/gcc/testsuite/rust/execute/torture/issue-1232.rs
index 6fb42b3167dc..d0db0eed5444 100644
--- a/gcc/testsuite/rust/execute/torture/issue-1232.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-1232.rs
@@ -2,6 +2,7 @@
 // { dg-output "slice_access=3\r*\n" }
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/issue-1249.rs b/gcc/testsuite/rust/execute/torture/issue-1249.rs
index e7a261c1a0ba..548600a242ce 100644
--- a/gcc/testsuite/rust/execute/torture/issue-1249.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-1249.rs
@@ -1,6 +1,7 @@
 // { dg-options "-w" }
 // { dg-output "1\r*\n2\r*\n" }
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/issue-1436.rs b/gcc/testsuite/rust/execute/torture/issue-1436.rs
index 5d909078b5ec..23620ab78350 100644
--- a/gcc/testsuite/rust/execute/torture/issue-1436.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-1436.rs
@@ -2,6 +2,7 @@
 
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/issue-1481.rs b/gcc/testsuite/rust/execute/torture/issue-1481.rs
index 2ff78d9b6055..e63e2bde5822 100644
--- a/gcc/testsuite/rust/execute/torture/issue-1481.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-1481.rs
@@ -1,5 +1,6 @@
 /* { dg-output "called Foo::print\\(\\)\r*" } */
 /* { dg-options "-w" } */
+#![feature(lang_items)]
 
 #[lang = "sized"]
 trait Sized {}
diff --git a/gcc/testsuite/rust/execute/torture/issue-1482.rs b/gcc/testsuite/rust/execute/torture/issue-1482.rs
index ed8dc8146103..3b1b3987af4b 100644
--- a/gcc/testsuite/rust/execute/torture/issue-1482.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-1482.rs
@@ -1,3 +1,5 @@
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/issue-1496.rs b/gcc/testsuite/rust/execute/torture/issue-1496.rs
index 36291a742368..26dd1ef8795b 100644
--- a/gcc/testsuite/rust/execute/torture/issue-1496.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-1496.rs
@@ -1,4 +1,6 @@
 /* { dg-output "foo_deref\r*\nimm_deref\r*\n123\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/issue-1720-2.rs b/gcc/testsuite/rust/execute/torture/issue-1720-2.rs
index 9c5356ed736c..d90072fb9583 100644
--- a/gcc/testsuite/rust/execute/torture/issue-1720-2.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-1720-2.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/issue-1720.rs b/gcc/testsuite/rust/execute/torture/issue-1720.rs
index 22182825490c..5da45eed5312 100644
--- a/gcc/testsuite/rust/execute/torture/issue-1720.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-1720.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/issue-2005.rs b/gcc/testsuite/rust/execute/torture/issue-2005.rs
index 87edb95988dc..29d445497dc4 100644
--- a/gcc/testsuite/rust/execute/torture/issue-2005.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-2005.rs
@@ -1,6 +1,6 @@
 // { dg-additional-options "-w" }
 /* { dg-output "WORKS\r?\n" } */
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 mod core {
     mod option {
diff --git a/gcc/testsuite/rust/execute/torture/issue-2052.rs b/gcc/testsuite/rust/execute/torture/issue-2052.rs
index bf5d6a7cfbc4..a30ddc4f5d3e 100644
--- a/gcc/testsuite/rust/execute/torture/issue-2052.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-2052.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/issue-2179.rs b/gcc/testsuite/rust/execute/torture/issue-2179.rs
index 8a5ec1bf32e2..c5da7ee7518b 100644
--- a/gcc/testsuite/rust/execute/torture/issue-2179.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-2179.rs
@@ -1,4 +1,5 @@
 // { dg-output "123\r*\n" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/issue-2180.rs b/gcc/testsuite/rust/execute/torture/issue-2180.rs
index 6bd71720e481..ee18c8be8d4e 100644
--- a/gcc/testsuite/rust/execute/torture/issue-2180.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-2180.rs
@@ -1,4 +1,5 @@
 // { dg-output "123\r*\n" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/issue-2236.rs b/gcc/testsuite/rust/execute/torture/issue-2236.rs
index 850b99718ef6..b7f28885eb51 100644
--- a/gcc/testsuite/rust/execute/torture/issue-2236.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-2236.rs
@@ -1,4 +1,5 @@
 // { dg-options "-w" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/issue-2583.rs b/gcc/testsuite/rust/execute/torture/issue-2583.rs
index 4ff12fca49e7..c45d61da421d 100644
--- a/gcc/testsuite/rust/execute/torture/issue-2583.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-2583.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/issue-3126.rs b/gcc/testsuite/rust/execute/torture/issue-3126.rs
index f5051467f027..65bc07da112f 100644
--- a/gcc/testsuite/rust/execute/torture/issue-3126.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-3126.rs
@@ -1,4 +1,6 @@
 /* { dg-output "child\r*\n" }*/
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/issue-3381.rs b/gcc/testsuite/rust/execute/torture/issue-3381.rs
index 62dbcd0b2fd2..02d96d766aa5 100644
--- a/gcc/testsuite/rust/execute/torture/issue-3381.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-3381.rs
@@ -1,4 +1,6 @@
 /* { dg-output "Err: 15\r*\n" } */
+#![feature(lang_items)]
+
 #[lang = "sized"]
 trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/issue-3502.rs b/gcc/testsuite/rust/execute/torture/issue-3502.rs
index f07a126b66a0..aa3885896c32 100644
--- a/gcc/testsuite/rust/execute/torture/issue-3502.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-3502.rs
@@ -1,4 +1,6 @@
 /* { dg-output "parent 123\r*\nchild\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/issue-3836.rs b/gcc/testsuite/rust/execute/torture/issue-3836.rs
index 61ad42492e74..5c9373675812 100644
--- a/gcc/testsuite/rust/execute/torture/issue-3836.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-3836.rs
@@ -1,7 +1,7 @@
 // { dg-options "-w" }
 // { dg-output "less\r*\n" }
 
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 mod core {
     mod option {
diff --git a/gcc/testsuite/rust/execute/torture/issue-647.rs b/gcc/testsuite/rust/execute/torture/issue-647.rs
index 6a3565571ef1..fbf4a1ec9e42 100644
--- a/gcc/testsuite/rust/execute/torture/issue-647.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-647.rs
@@ -1,4 +1,6 @@
 /* { dg-output "Hello World 123\r*\n" }*/
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/issue-845.rs b/gcc/testsuite/rust/execute/torture/issue-845.rs
index b11ccd5374a1..060cf0be7935 100644
--- a/gcc/testsuite/rust/execute/torture/issue-845.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-845.rs
@@ -1,5 +1,7 @@
 // { dg-output "Foo::bar\r*\n" }
 // { dg-additional-options "-w" }
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/issue-851.rs b/gcc/testsuite/rust/execute/torture/issue-851.rs
index 1361235b9781..093143f9b3c9 100644
--- a/gcc/testsuite/rust/execute/torture/issue-851.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-851.rs
@@ -1,4 +1,6 @@
 /* { dg-output "Result: 123\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/issue-858.rs b/gcc/testsuite/rust/execute/torture/issue-858.rs
index 0b1118b4f8d3..63518cee1014 100644
--- a/gcc/testsuite/rust/execute/torture/issue-858.rs
+++ b/gcc/testsuite/rust/execute/torture/issue-858.rs
@@ -1,4 +1,6 @@
 /* { dg-output "Result: 123\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/iter1.rs b/gcc/testsuite/rust/execute/torture/iter1.rs
index 233eb60383b3..84b5033e0133 100644
--- a/gcc/testsuite/rust/execute/torture/iter1.rs
+++ b/gcc/testsuite/rust/execute/torture/iter1.rs
@@ -1,5 +1,5 @@
 // { dg-output "1\r*\n2\r*\n" }
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 pub use option::Option::{self, None, Some};
 pub use result::Result::{self, Err, Ok};
diff --git a/gcc/testsuite/rust/execute/torture/macros23.rs b/gcc/testsuite/rust/execute/torture/macros23.rs
index b27985d3befd..ef958af69544 100644
--- a/gcc/testsuite/rust/execute/torture/macros23.rs
+++ b/gcc/testsuite/rust/execute/torture/macros23.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/macros28.rs b/gcc/testsuite/rust/execute/torture/macros28.rs
index 46d9cfcac0c3..db1d9f21ca82 100644
--- a/gcc/testsuite/rust/execute/torture/macros28.rs
+++ b/gcc/testsuite/rust/execute/torture/macros28.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/method2.rs b/gcc/testsuite/rust/execute/torture/method2.rs
index e5f630a6d4fe..0355a750c650 100644
--- a/gcc/testsuite/rust/execute/torture/method2.rs
+++ b/gcc/testsuite/rust/execute/torture/method2.rs
@@ -1,5 +1,7 @@
 // { dg-additional-options "-w" }
 // { dg-output "foo_deref\r*\nimm_deref\r*\n" }
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/method3.rs b/gcc/testsuite/rust/execute/torture/method3.rs
index 9a7865ca979c..70b77923f864 100644
--- a/gcc/testsuite/rust/execute/torture/method3.rs
+++ b/gcc/testsuite/rust/execute/torture/method3.rs
@@ -1,5 +1,7 @@
 // { dg-additional-options "-w" }
 // { dg-output "mut_deref\r*\nfoobar: 123\r*\n" }
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/method4.rs b/gcc/testsuite/rust/execute/torture/method4.rs
index e20618f06350..f4b3a3352a93 100644
--- a/gcc/testsuite/rust/execute/torture/method4.rs
+++ b/gcc/testsuite/rust/execute/torture/method4.rs
@@ -1,5 +1,7 @@
 // { dg-additional-options "-w" }
 // { dg-output "mut_deref\r*\nfoobar: 123\r*\n" }
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/min_specialization2.rs b/gcc/testsuite/rust/execute/torture/min_specialization2.rs
index 74faee4eb2d4..b3eac27b2f0d 100644
--- a/gcc/testsuite/rust/execute/torture/min_specialization2.rs
+++ b/gcc/testsuite/rust/execute/torture/min_specialization2.rs
@@ -1,4 +1,4 @@
-#![feature(min_specialization)]
+#![feature(min_specialization, lang_items)]
 
 #[lang = "sized"]
 trait Sized {}
diff --git a/gcc/testsuite/rust/execute/torture/min_specialization3.rs b/gcc/testsuite/rust/execute/torture/min_specialization3.rs
index 9eccd974dae7..b73a8acea4e8 100644
--- a/gcc/testsuite/rust/execute/torture/min_specialization3.rs
+++ b/gcc/testsuite/rust/execute/torture/min_specialization3.rs
@@ -1,4 +1,4 @@
-#![feature(min_specialization)]
+#![feature(min_specialization, lang_items)]
 
 #[lang = "sized"]
 trait Sized {}
diff --git a/gcc/testsuite/rust/execute/torture/operator_overload_1.rs b/gcc/testsuite/rust/execute/torture/operator_overload_1.rs
index 9aed3933c42a..0fc6372d6c37 100644
--- a/gcc/testsuite/rust/execute/torture/operator_overload_1.rs
+++ b/gcc/testsuite/rust/execute/torture/operator_overload_1.rs
@@ -1,4 +1,6 @@
 /* { dg-output "3\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/operator_overload_10.rs b/gcc/testsuite/rust/execute/torture/operator_overload_10.rs
index 921ec5f6fe9a..6989347edb3b 100644
--- a/gcc/testsuite/rust/execute/torture/operator_overload_10.rs
+++ b/gcc/testsuite/rust/execute/torture/operator_overload_10.rs
@@ -1,4 +1,6 @@
 /* { dg-output "foo_deref\r*\n123\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/operator_overload_11.rs b/gcc/testsuite/rust/execute/torture/operator_overload_11.rs
index f0359fb4d809..d0b45a7212c7 100644
--- a/gcc/testsuite/rust/execute/torture/operator_overload_11.rs
+++ b/gcc/testsuite/rust/execute/torture/operator_overload_11.rs
@@ -1,5 +1,7 @@
 // { dg-output "1\r*\n" }
 // { dg-additional-options "-w" }
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/operator_overload_12.rs b/gcc/testsuite/rust/execute/torture/operator_overload_12.rs
index 2cd5c69f1e1f..a0e1bc8f18f9 100644
--- a/gcc/testsuite/rust/execute/torture/operator_overload_12.rs
+++ b/gcc/testsuite/rust/execute/torture/operator_overload_12.rs
@@ -1,5 +1,7 @@
 // { dg-output "1\r*\n" }
 // { dg-additional-options "-w" }
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/operator_overload_2.rs b/gcc/testsuite/rust/execute/torture/operator_overload_2.rs
index 686241547429..dfc2530068f8 100644
--- a/gcc/testsuite/rust/execute/torture/operator_overload_2.rs
+++ b/gcc/testsuite/rust/execute/torture/operator_overload_2.rs
@@ -1,4 +1,6 @@
 /* { dg-output "3\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/operator_overload_3.rs b/gcc/testsuite/rust/execute/torture/operator_overload_3.rs
index 6c1a8b8f8b8a..68071430a33f 100644
--- a/gcc/testsuite/rust/execute/torture/operator_overload_3.rs
+++ b/gcc/testsuite/rust/execute/torture/operator_overload_3.rs
@@ -1,4 +1,6 @@
 /* { dg-output "3\r*\n3\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/operator_overload_4.rs b/gcc/testsuite/rust/execute/torture/operator_overload_4.rs
index c8235c6a822f..3f68bf1a92fa 100644
--- a/gcc/testsuite/rust/execute/torture/operator_overload_4.rs
+++ b/gcc/testsuite/rust/execute/torture/operator_overload_4.rs
@@ -1,4 +1,6 @@
 /* { dg-output "neg\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/operator_overload_5.rs b/gcc/testsuite/rust/execute/torture/operator_overload_5.rs
index eeef5bc576bb..b5c1fd609f50 100644
--- a/gcc/testsuite/rust/execute/torture/operator_overload_5.rs
+++ b/gcc/testsuite/rust/execute/torture/operator_overload_5.rs
@@ -1,4 +1,6 @@
 /* { dg-output "not\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/operator_overload_6.rs b/gcc/testsuite/rust/execute/torture/operator_overload_6.rs
index d5ffae51fab0..0a69758bb325 100644
--- a/gcc/testsuite/rust/execute/torture/operator_overload_6.rs
+++ b/gcc/testsuite/rust/execute/torture/operator_overload_6.rs
@@ -1,4 +1,6 @@
 /* { dg-output "add_assign\r*\n3\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/operator_overload_7.rs b/gcc/testsuite/rust/execute/torture/operator_overload_7.rs
index 7226b26920bc..e1bd7c41b2e0 100644
--- a/gcc/testsuite/rust/execute/torture/operator_overload_7.rs
+++ b/gcc/testsuite/rust/execute/torture/operator_overload_7.rs
@@ -1,4 +1,6 @@
 /* { dg-output "imm_deref\r*\n123\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/operator_overload_8.rs b/gcc/testsuite/rust/execute/torture/operator_overload_8.rs
index 4b589a8af458..8324768354c8 100644
--- a/gcc/testsuite/rust/execute/torture/operator_overload_8.rs
+++ b/gcc/testsuite/rust/execute/torture/operator_overload_8.rs
@@ -1,4 +1,6 @@
 /* { dg-output "imm_deref\r*\n123\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/operator_overload_9.rs b/gcc/testsuite/rust/execute/torture/operator_overload_9.rs
index 5fc042850ed3..4d10f78ed652 100644
--- a/gcc/testsuite/rust/execute/torture/operator_overload_9.rs
+++ b/gcc/testsuite/rust/execute/torture/operator_overload_9.rs
@@ -1,4 +1,6 @@
 /* { dg-output "mut_deref\r*\n123\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/partial-eq-1.rs b/gcc/testsuite/rust/execute/torture/partial-eq-1.rs
index db123a1b5e7d..fa918f3e89c1 100644
--- a/gcc/testsuite/rust/execute/torture/partial-eq-1.rs
+++ b/gcc/testsuite/rust/execute/torture/partial-eq-1.rs
@@ -1,5 +1,6 @@
 /* { dg-output "a == b\r*\na != c\r*\n" }*/
 /* { dg-options "-w" } */
+#![feature(lang_items)]
 
 mod core {
     mod marker {
diff --git a/gcc/testsuite/rust/execute/torture/partial-eq-2.rs b/gcc/testsuite/rust/execute/torture/partial-eq-2.rs
index debed8c83f32..e132ef07de16 100644
--- a/gcc/testsuite/rust/execute/torture/partial-eq-2.rs
+++ b/gcc/testsuite/rust/execute/torture/partial-eq-2.rs
@@ -1,6 +1,7 @@
 /* { dg-output "a == b\r*\na != c\r*\n" }*/
 /* { dg-options "-w" } */
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/partial-eq-3.rs b/gcc/testsuite/rust/execute/torture/partial-eq-3.rs
index 849910afc832..4ace3d92320e 100644
--- a/gcc/testsuite/rust/execute/torture/partial-eq-3.rs
+++ b/gcc/testsuite/rust/execute/torture/partial-eq-3.rs
@@ -1,7 +1,7 @@
 /* { dg-output "a == b\r*\na != c\r*\n" }*/
 /* { dg-options "-w" } */
 
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 mod core {
     mod option {
diff --git a/gcc/testsuite/rust/execute/torture/partial-eq-4.rs b/gcc/testsuite/rust/execute/torture/partial-eq-4.rs
index b6997d8592fa..d1835db1626d 100644
--- a/gcc/testsuite/rust/execute/torture/partial-eq-4.rs
+++ b/gcc/testsuite/rust/execute/torture/partial-eq-4.rs
@@ -1,7 +1,7 @@
 /* { dg-output "a == b\r*\na != c\r*\n" }*/
 /* { dg-options "-w" } */
 
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 mod core {
     mod option {
diff --git a/gcc/testsuite/rust/execute/torture/partial-ord-1.rs b/gcc/testsuite/rust/execute/torture/partial-ord-1.rs
index a3558e7cb7a9..b1546a3e9283 100644
--- a/gcc/testsuite/rust/execute/torture/partial-ord-1.rs
+++ b/gcc/testsuite/rust/execute/torture/partial-ord-1.rs
@@ -1,4 +1,5 @@
 /* { dg-output "x == y\r*\nx > z\r*\n" }*/
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/partial-ord-2.rs b/gcc/testsuite/rust/execute/torture/partial-ord-2.rs
index d3b713fc5e26..76cdc2a17921 100644
--- a/gcc/testsuite/rust/execute/torture/partial-ord-2.rs
+++ b/gcc/testsuite/rust/execute/torture/partial-ord-2.rs
@@ -1,6 +1,6 @@
 /* { dg-output "x == y\r*\nx > z\r*\n" }*/
 
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 mod core {
     mod option {
diff --git a/gcc/testsuite/rust/execute/torture/partial-ord-3.rs b/gcc/testsuite/rust/execute/torture/partial-ord-3.rs
index 7aec07c5caaa..dd8072fe910d 100644
--- a/gcc/testsuite/rust/execute/torture/partial-ord-3.rs
+++ b/gcc/testsuite/rust/execute/torture/partial-ord-3.rs
@@ -1,7 +1,7 @@
 /* { dg-output "x == y\r*\nx > z\r*\nx < z\r*\nx >= y\r*\nx <= y\r*\n" } */
 /* { dg-options "-w" } */
 
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 mod core {
     mod option {
diff --git a/gcc/testsuite/rust/execute/torture/partial-ord-4.rs b/gcc/testsuite/rust/execute/torture/partial-ord-4.rs
index fd52f328c58b..de130745e681 100644
--- a/gcc/testsuite/rust/execute/torture/partial-ord-4.rs
+++ b/gcc/testsuite/rust/execute/torture/partial-ord-4.rs
@@ -1,7 +1,7 @@
 /* { dg-output "a == b\r*\na != c\r*\n" }*/
 /* { dg-options "-w" } */
 
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 mod core {
     mod option {
diff --git a/gcc/testsuite/rust/execute/torture/partial-ord-5.rs b/gcc/testsuite/rust/execute/torture/partial-ord-5.rs
index 721d2aa00655..b87a08ebcca5 100644
--- a/gcc/testsuite/rust/execute/torture/partial-ord-5.rs
+++ b/gcc/testsuite/rust/execute/torture/partial-ord-5.rs
@@ -1,7 +1,7 @@
 /* { dg-output "a == b\r*\na != c\r*\na >= c\r*\na <= b\r*\na > c\r*\nc < b\r*\n" } */
 /* { dg-options "-w" } */
 
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 mod core {
     mod option {
diff --git a/gcc/testsuite/rust/execute/torture/partial-ord-6.rs b/gcc/testsuite/rust/execute/torture/partial-ord-6.rs
index 5d64f8c2f84c..04f13cdac37b 100644
--- a/gcc/testsuite/rust/execute/torture/partial-ord-6.rs
+++ b/gcc/testsuite/rust/execute/torture/partial-ord-6.rs
@@ -1,7 +1,7 @@
 // { dg-additional-options "-w" }
 /* { dg-output "Foo A < B\r?\nFoo B < C\r?\nFoo C == C\r?\nBar x < y\r?\nBarFull s1 < s2\r?\n" } */
 
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 mod core {
     mod option {
diff --git a/gcc/testsuite/rust/execute/torture/prefetch_data.rs b/gcc/testsuite/rust/execute/torture/prefetch_data.rs
index 2a847fbcb397..a155e670d3b3 100644
--- a/gcc/testsuite/rust/execute/torture/prefetch_data.rs
+++ b/gcc/testsuite/rust/execute/torture/prefetch_data.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/ref-pattern2.rs b/gcc/testsuite/rust/execute/torture/ref-pattern2.rs
index 8e7172406c47..cde7ea533317 100644
--- a/gcc/testsuite/rust/execute/torture/ref-pattern2.rs
+++ b/gcc/testsuite/rust/execute/torture/ref-pattern2.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/sip-hasher.rs b/gcc/testsuite/rust/execute/torture/sip-hasher.rs
index 60826a3ed012..32cdc22fe912 100644
--- a/gcc/testsuite/rust/execute/torture/sip-hasher.rs
+++ b/gcc/testsuite/rust/execute/torture/sip-hasher.rs
@@ -1,8 +1,7 @@
 // { dg-skip-if "" { *-*-* } { "-m32" } { "" } }
 // { dg-options "-w" }
 // { dg-output "Hash: 0x63d53fd2170bbb8c\r*\n" }
-#![feature(intrinsics)]
-#![feature(rustc_attrs)]
+#![feature(intrinsics, lang_items, rustc_attrs)]
 
 #[lang = "sized"]
 trait Sized {}
diff --git a/gcc/testsuite/rust/execute/torture/slice-magic.rs b/gcc/testsuite/rust/execute/torture/slice-magic.rs
index 1f56187ee5d6..521a2513f620 100644
--- a/gcc/testsuite/rust/execute/torture/slice-magic.rs
+++ b/gcc/testsuite/rust/execute/torture/slice-magic.rs
@@ -1,6 +1,7 @@
 // { dg-additional-options "-w" }
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/slice-magic2.rs b/gcc/testsuite/rust/execute/torture/slice-magic2.rs
index 20f113ef97d8..75c04f382be6 100644
--- a/gcc/testsuite/rust/execute/torture/slice-magic2.rs
+++ b/gcc/testsuite/rust/execute/torture/slice-magic2.rs
@@ -1,6 +1,7 @@
 // { dg-additional-options "-w" }
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/slice1.rs b/gcc/testsuite/rust/execute/torture/slice1.rs
index 2683179c7586..317ff7a81879 100644
--- a/gcc/testsuite/rust/execute/torture/slice1.rs
+++ b/gcc/testsuite/rust/execute/torture/slice1.rs
@@ -1,4 +1,5 @@
 // { dg-additional-options "-w" }
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/str-layout1.rs b/gcc/testsuite/rust/execute/torture/str-layout1.rs
index fb3b4e34a7c2..a28d2650862e 100644
--- a/gcc/testsuite/rust/execute/torture/str-layout1.rs
+++ b/gcc/testsuite/rust/execute/torture/str-layout1.rs
@@ -2,6 +2,7 @@
 // { dg-output "t1sz=5 t2sz=10\r*" }
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/trait1.rs b/gcc/testsuite/rust/execute/torture/trait1.rs
index f8a5959edd52..db5b6e2473e4 100644
--- a/gcc/testsuite/rust/execute/torture/trait1.rs
+++ b/gcc/testsuite/rust/execute/torture/trait1.rs
@@ -1,4 +1,6 @@
 /* { dg-output "S::f\r*\nT1::f\r*\nT2::f\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/trait10.rs b/gcc/testsuite/rust/execute/torture/trait10.rs
index 4e576eb82496..4eb9546af778 100644
--- a/gcc/testsuite/rust/execute/torture/trait10.rs
+++ b/gcc/testsuite/rust/execute/torture/trait10.rs
@@ -1,4 +1,6 @@
 /* { dg-output "123\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/trait11.rs b/gcc/testsuite/rust/execute/torture/trait11.rs
index cca084ae8d09..84add740ed1f 100644
--- a/gcc/testsuite/rust/execute/torture/trait11.rs
+++ b/gcc/testsuite/rust/execute/torture/trait11.rs
@@ -1,4 +1,5 @@
 /* { dg-output "3\r*\n" } */
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/trait12.rs b/gcc/testsuite/rust/execute/torture/trait12.rs
index d174a891409b..dd7a6442c6cc 100644
--- a/gcc/testsuite/rust/execute/torture/trait12.rs
+++ b/gcc/testsuite/rust/execute/torture/trait12.rs
@@ -1,4 +1,6 @@
 /* { dg-output "3\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/trait13.rs b/gcc/testsuite/rust/execute/torture/trait13.rs
index 0d8f89487058..25912bd86727 100644
--- a/gcc/testsuite/rust/execute/torture/trait13.rs
+++ b/gcc/testsuite/rust/execute/torture/trait13.rs
@@ -1,4 +1,6 @@
 /* { dg-output "123\r*\n456\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/trait14.rs b/gcc/testsuite/rust/execute/torture/trait14.rs
index 759950e6fe2b..ebc0c5c80354 100644
--- a/gcc/testsuite/rust/execute/torture/trait14.rs
+++ b/gcc/testsuite/rust/execute/torture/trait14.rs
@@ -1,4 +1,5 @@
 /* { dg-output "parent123\r*\nchild\r*\n" } */
+#![feature(lang_items)]
 
 extern "C" {
     fn printf(s: *const i8, ...);
diff --git a/gcc/testsuite/rust/execute/torture/trait15.rs b/gcc/testsuite/rust/execute/torture/trait15.rs
index 53469d78f53a..59f8dc3bcce9 100644
--- a/gcc/testsuite/rust/execute/torture/trait15.rs
+++ b/gcc/testsuite/rust/execute/torture/trait15.rs
@@ -1,6 +1,8 @@
 /* { dg-output "parent123\r*\nchild\r*\n" } */
 // Testing generics passing with supertraits
 
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/trait2.rs b/gcc/testsuite/rust/execute/torture/trait2.rs
index d5fd5466fe92..db69c1e83fce 100644
--- a/gcc/testsuite/rust/execute/torture/trait2.rs
+++ b/gcc/testsuite/rust/execute/torture/trait2.rs
@@ -1,4 +1,6 @@
 /* { dg-output "Bar::A = 456\r*\n<Foo as Bar>::A = 456\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/trait3.rs b/gcc/testsuite/rust/execute/torture/trait3.rs
index 668b43760b4b..d39d3241a64b 100644
--- a/gcc/testsuite/rust/execute/torture/trait3.rs
+++ b/gcc/testsuite/rust/execute/torture/trait3.rs
@@ -1,4 +1,6 @@
 /* { dg-output "123, 777\r*" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/trait4.rs b/gcc/testsuite/rust/execute/torture/trait4.rs
index 61c2d1584332..fb1eaaed92a6 100644
--- a/gcc/testsuite/rust/execute/torture/trait4.rs
+++ b/gcc/testsuite/rust/execute/torture/trait4.rs
@@ -1,4 +1,6 @@
 /* { dg-output "123\r*\n" }*/
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/trait5.rs b/gcc/testsuite/rust/execute/torture/trait5.rs
index 7cd7d1a19efc..67b5dd4eae22 100644
--- a/gcc/testsuite/rust/execute/torture/trait5.rs
+++ b/gcc/testsuite/rust/execute/torture/trait5.rs
@@ -1,4 +1,6 @@
 /* { dg-output "123\r*\n123\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/trait6.rs b/gcc/testsuite/rust/execute/torture/trait6.rs
index de5ddc1ea9e8..baa075be7d43 100644
--- a/gcc/testsuite/rust/execute/torture/trait6.rs
+++ b/gcc/testsuite/rust/execute/torture/trait6.rs
@@ -1,4 +1,6 @@
 /* { dg-output "123\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/trait7.rs b/gcc/testsuite/rust/execute/torture/trait7.rs
index 21f1575218bd..47d40aeae3da 100644
--- a/gcc/testsuite/rust/execute/torture/trait7.rs
+++ b/gcc/testsuite/rust/execute/torture/trait7.rs
@@ -1,4 +1,6 @@
 /* { dg-output "123\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/trait8.rs b/gcc/testsuite/rust/execute/torture/trait8.rs
index 69e784ef3b44..cbce3c1b361c 100644
--- a/gcc/testsuite/rust/execute/torture/trait8.rs
+++ b/gcc/testsuite/rust/execute/torture/trait8.rs
@@ -1,4 +1,6 @@
 /* { dg-output "123\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/trait9.rs b/gcc/testsuite/rust/execute/torture/trait9.rs
index f60554adae69..3448eb88a779 100644
--- a/gcc/testsuite/rust/execute/torture/trait9.rs
+++ b/gcc/testsuite/rust/execute/torture/trait9.rs
@@ -1,4 +1,6 @@
 /* { dg-output "3\r*\n" } */
+#![feature(lang_items)]
+
 extern "C" {
     fn printf(s: *const i8, ...);
 }
diff --git a/gcc/testsuite/rust/execute/torture/transmute1.rs b/gcc/testsuite/rust/execute/torture/transmute1.rs
index d89affd5b820..8da1ae732a01 100644
--- a/gcc/testsuite/rust/execute/torture/transmute1.rs
+++ b/gcc/testsuite/rust/execute/torture/transmute1.rs
@@ -1,5 +1,5 @@
 // { dg-additional-options "-w" }
-#![feature(intrinsics)]
+#![feature(intrinsics, lang_items)]
 
 extern "rust-intrinsic" {
     fn transmute<T, U>(value: T) -> U;
diff --git a/gcc/testsuite/rust/execute/torture/wrapping_op1.rs b/gcc/testsuite/rust/execute/torture/wrapping_op1.rs
index e0c100cd20cc..ba9b1686779e 100644
--- a/gcc/testsuite/rust/execute/torture/wrapping_op1.rs
+++ b/gcc/testsuite/rust/execute/torture/wrapping_op1.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/execute/torture/wrapping_op2.rs b/gcc/testsuite/rust/execute/torture/wrapping_op2.rs
index 692899281008..5e6a37db9b70 100644
--- a/gcc/testsuite/rust/execute/torture/wrapping_op2.rs
+++ b/gcc/testsuite/rust/execute/torture/wrapping_op2.rs
@@ -1,5 +1,6 @@
 #![feature(intrinsics)]
 
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/link/generic_function_1.rs b/gcc/testsuite/rust/link/generic_function_1.rs
index 46d0e825b9da..dab62f0d00d1 100644
--- a/gcc/testsuite/rust/link/generic_function_1.rs
+++ b/gcc/testsuite/rust/link/generic_function_1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}
 
diff --git a/gcc/testsuite/rust/link/trait_import_1.rs b/gcc/testsuite/rust/link/trait_import_1.rs
index e54b0e19d44c..589871d016eb 100644
--- a/gcc/testsuite/rust/link/trait_import_1.rs
+++ b/gcc/testsuite/rust/link/trait_import_1.rs
@@ -1,3 +1,4 @@
+#![feature(lang_items)]
 #[lang = "sized"]
 pub trait Sized {}