blob: b33802e2bc8dafd4517785d279ab5683c446ba29 (
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// build-pass
// needs to be build-pass, because it is a regression test for a mir validation failure
// that only happens during codegen.
struct D;
trait Tr {
type It;
fn foo(self) -> Option<Self::It>;
}
impl<'a> Tr for &'a D {
type It = ();
fn foo(self) -> Option<()> { None }
}
fn run<F>(f: F)
where for<'a> &'a D: Tr,
F: Fn(<&D as Tr>::It),
{
let d = &D;
while let Some(i) = d.foo() {
f(i);
}
}
fn main() {
run(|_| {});
}
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