// rust-lang/rust/issues/71546#issuecomment-620638437
// as they seem to have the same cause.
+// FIXME: It's not clear that this code ought to report
+// an error, but the regression test is here to ensure
+// that it does not ICE. See discussion on #74889 for details.
+
pub trait T {
fn t<F: Fn()>(&self, _: F) {}
}