| error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in generic parameter defaults |
| --> $DIR/issue-83929-impl-trait-in-generic-default.rs:1:16 |
| | |
| LL | struct Foo<T = impl Copy>(T); |
| | ^^^^^^^^^ |
| |
| error[E0562]: `impl Trait` only allowed in function and inherent method argument and return types, not in generic parameter defaults |
| --> $DIR/issue-83929-impl-trait-in-generic-default.rs:4:20 |
| | |
| LL | type Result<T, E = impl std::error::Error> = std::result::Result<T, E>; |
| | ^^^^^^^^^^^^^^^^^^^^^^ |
| |
| error: aborting due to 2 previous errors |
| |
| For more information about this error, try `rustc --explain E0562`. |
