From 4cb3336ca1d34e143efa3333a03cb0bf63eaf5f4 Mon Sep 17 00:00:00 2001
From: Technici4n <13494793+Technici4n@users.noreply.github.com>
Date: Mon, 18 Nov 2024 10:13:11 +0100
Subject: [PATCH] Fix #714: Make TAGCOUNT always greater than the last
 instantiated Tag's count

---
 src/config.jl | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/config.jl b/src/config.jl
index 30f02ae5..6c111363 100644
--- a/src/config.jl
+++ b/src/config.jl
@@ -14,7 +14,9 @@ const TAGCOUNT = Threads.Atomic{UInt}(0)
 end
 
 function Tag(f::F, ::Type{V}) where {F,V}
-    tagcount(Tag{F,V}) # trigger generated function
+    count = tagcount(Tag{F,V}) # trigger generated function
+    # make sure inner derivatives have a higher count even if this Tag instantiation was precompiled; fixes #714
+    Threads.atomic_max!(TAGCOUNT, count+1)
     Tag{F,V}()
 end