std.meta.FieldEnum for type with one field does not work in std.EnumArray #22506
Description
Zig Version
0.14.0-dev.2647+5322459a0
Steps to Reproduce and Observed Behavior
Using an enum generated by std.meta.FieldEnum from a type with exactly one field in a std.EnumArray fails to compile if iterator.next() is called.
Example
const std = @import("std");
const A = struct {
x: u32,
// y: u32, // it works if A has a second field, or if A has no fields
};
const AEnum = std.meta.FieldEnum(A);
const MyEnum = enum { x };
pub fn main() void {
// this doesn't compile
var a = std.EnumArray(AEnum, u32).initFill(123);
var it = a.iterator();
while (it.next()) |n| _ = n;
// this compiles
var b = std.EnumArray(MyEnum, u32).initFill(123);
var it2 = b.iterator();
while (it2.next()) |n| _ = n;
}fails to compile with the error message
/home/j/Programs/zig-linux-x86_64-0.14.0-dev.2647+5322459a0/lib/std/enums.zig:1158:39: error: value stored in comptime field does not match the default value of the field
.key = Indexer.keyForIndex(index),
~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
/home/j/Programs/zig-linux-x86_64-0.14.0-dev.2647+5322459a0/lib/std/enums.zig:1141:13: note: default value set here
key: Key,
Expected Behavior
I would expect it to compile and behave like an enum implemented by hand.