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