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