src/test/ui/type-alias-impl-trait/issue-66580-closure-coherence.rs

   1 // Regression test for issue #66580
   2 // Ensures that we don't try to determine whether a closure
   3 // is foreign when it's the underlying type of an opaque type
   4 // check-pass
   5 // revisions: min_tait full_tait
   6 #![feature(min_type_alias_impl_trait)]
   7 #![cfg_attr(full_tait, feature(type_alias_impl_trait))]
   8 //[full_tait]~^ WARN incomplete
   9
  10 type Closure = impl FnOnce();
  11
  12 fn closure() -> Closure {
  13     || {}
  14 }
  15
  16 struct Wrap<T> { f: T }
  17
  18 impl Wrap<Closure> {}
  19
  20 impl<T> Wrap<T> {}
  21
  22 fn main() {}