| struct Foo<T = impl Copy>(T); | |
| //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types | |
| type Result<T, E = impl std::error::Error> = std::result::Result<T, E>; | |
| //~^ ERROR `impl Trait` only allowed in function and inherent method argument and return types | |
| // should not cause ICE | |
| fn x() -> Foo { | |
| Foo(0) | |
| } | |
| fn main() -> Result<()> {} |