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// issue: rust-lang/rust#104779
// ICE region infer, IndexMap: key not found
struct Inv<'a>(&'a mut &'a ());
enum Foo<T> {
Bar,
Var(T),
}
type Subtype = Foo<for<'a, 'b> fn(Inv<'a>, Inv<'b>)>;
type Supertype = Foo<for<'a> fn(Inv<'a>, Inv<'a>)>;
fn foo() -> impl Sized {
//~^ WARN function cannot return without recursing
loop {
match foo() {
//~^ ERROR higher-ranked subtype error
//~^^ ERROR higher-ranked subtype error
Subtype::Bar => (),
//~^ ERROR higher-ranked subtype error
//~^^ ERROR higher-ranked subtype error
Supertype::Var(x) => {}
}
}
}
pub fn main() {}
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