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//@ revisions: current next
//@[next] compile-flags: -Znext-solver
//@ ignore-compare-mode-next-solver (explicit revisions)
//@ check-pass
// Regression test for <https://github.com/rust-lang/trait-system-refactor-initiative/issues/194>.
// Ensure that we check the well-formedness of `<Check as Mode>::Output<T>` after normalizing
// the type to `()`, since we only imply outlives bounds from the normalized signature, so we
// don't know (e.g.) that `&mut T` is WF.
trait Mode {
type Output<T>;
fn from_mut<T>(_r: &mut Self::Output<T>) -> Self::Output<&mut T>;
}
struct Check;
impl Mode for Check {
type Output<T> = ();
fn from_mut<T>(_r: &mut Self::Output<T>) -> Self::Output<&mut T> {}
}
fn main() {}
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