src/test/ui/type-alias-impl-trait/issue-63279.stderr

   1 error[E0271]: type mismatch resolving `<[closure@$DIR/issue-63279.rs:6:5: 6:28] as std::ops::FnOnce<()>>::Output == ()`
   2   --> $DIR/issue-63279.rs:3:1
   3    |
   4 LL | type Closure = impl FnOnce();
   5    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected opaque type, found `()`
   6    |
   7    = note: expected opaque type `Closure`
   8                 found unit type `()`
   9    = note: the return type of a function must have a statically known size
  10
  11 error: aborting due to previous error
  12
  13 For more information about this error, try `rustc --explain E0271`.