Original issue #35338, PR #35364.
From: src/test/compile-fail/const-fn-mismatch.rs
Bonus: shrink the span to focus on the const part:
error[E0379]: trait fns cannot be declared const
--> src/test/compile-fail/const-fn-mismatch.rs:23:5
|
23 | const fn f() -> u32 { 22 } //~ ERROR E0379
| ^^^^^ trait tns cannot be const
Original issue #35338, PR #35364.
From: src/test/compile-fail/const-fn-mismatch.rs
Bonus: shrink the span to focus on the const part: