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