Ensure that negative auto impls are always applicable

2025-02-28 01:28:32 +00:00
parent fd17deacce
commit 3d62b279dd
19 changed files with 275 additions and 107 deletions
--- a/library/core/src/convert/mod.rs
+++ b/library/core/src/convert/mod.rs
@@ -778,7 +778,6 @@ impl<T> From<T> for T {
 ///
 /// [#64715]: https://github.com/rust-lang/rust/issues/64715
 #[stable(feature = "convert_infallible", since = "1.34.0")]
-#[allow(unused_attributes)] // FIXME(#58633): do a principled fix instead.
 #[rustc_reservation_impl = "permitting this impl would forbid us from adding \
                            `impl<T> From<!> for T` later; see rust-lang/rust#64715 for details"]
 impl<T> From<!> for T {