warning: the feature `type_alias_impl_trait` is incomplete and may not be safe to use and/or cause compiler crashes
  --> $DIR/incoherent-assoc-imp-trait.rs:6:32
   |
LL | #![cfg_attr(full_tait, feature(type_alias_impl_trait))]
   |                                ^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `#[warn(incomplete_features)]` on by default
   = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information

error[E0119]: conflicting implementations of trait `std::ops::FnOnce<()>` for type `&_`
  --> $DIR/incoherent-assoc-imp-trait.rs:13:1
   |
LL | impl<F> FnOnce<()> for &F {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: conflicting implementation in crate `core`:
           - impl<A, F> FnOnce<A> for &F
             where F: Fn<A>, F: ?Sized;

error[E0210]: type parameter `F` must be used as the type parameter for some local type (e.g., `MyStruct<F>`)
  --> $DIR/incoherent-assoc-imp-trait.rs:13:6
   |
LL | impl<F> FnOnce<()> for &F {
   |      ^ type parameter `F` must be used as the type parameter for some local type
   |
   = note: implementing a foreign trait is only possible if at least one of the types for which it is implemented is local
   = note: only traits defined in the current crate can be implemented for a type parameter

error: aborting due to 2 previous errors; 1 warning emitted

Some errors have detailed explanations: E0119, E0210.
For more information about an error, try `rustc --explain E0119`.