24 lines
494 B
Rust
24 lines
494 B
Rust
//@ revisions: current next
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//@[next] compile-flags: -Znext-solver
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//@[next] check-pass
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#![feature(type_alias_impl_trait)]
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type A = impl Foo;
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type B = impl Foo;
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trait Foo {}
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fn muh(x: A) -> B {
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if false {
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return Bar; // B's hidden type is Bar
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}
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x // A's hidden type is `Bar`, because all the hidden types of `B` are compared with each other
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//[current]~^ ERROR opaque type's hidden type cannot be another opaque type
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}
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struct Bar;
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impl Foo for Bar {}
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fn main() {}
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