| // Regression test for #54593: the MIR type checker was going wrong | |
| // when a closure returns the `impl Copy` from its parent fn. It was | |
| // (incorrectly) replacing the `impl Copy` in its return type with the | |
| // hidden type (`()`) but that type resulted from a recursive call to | |
| // `foo` and hence is treated opaquely within the closure body. This | |
| // resulted in a failed subtype relationship. | |
| // | |
| //@ check-pass | |
| fn foo() -> impl Copy { || foo(); } | |
| fn bar() -> impl Copy { || bar(); } | |
| fn main() { } |