LL | foo((), drop)
| ^^^^
| |
- | expected signature of `fn(<() as Trait<'a>>::Item) -> _`
+ | expected signature of `for<'a> fn(<() as Trait<'a>>::Item) -> _`
| found signature of `fn(()) -> _`
-error: aborting due to previous error
+error[E0277]: the size for values of type `<() as Trait<'_>>::Item` cannot be known at compilation time
+ --> $DIR/issue-60283.rs:17:13
+ |
+LL | foo((), drop)
+ | ^^^^ doesn't have a size known at compile-time
+ |
+ ::: $SRC_DIR/core/src/mem/mod.rs:LL:COL
+ |
+LL | pub fn drop<T>(_x: T) {}
+ | - required by this bound in `std::mem::drop`
+ |
+ = help: the trait `Sized` is not implemented for `<() as Trait<'_>>::Item`
+help: consider further restricting the associated type
+ |
+LL | fn main() where <() as Trait<'_>>::Item: Sized {
+ | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 2 previous errors
-For more information about this error, try `rustc --explain E0631`.
+Some errors have detailed explanations: E0277, E0631.
+For more information about an error, try `rustc --explain E0277`.