1 // Test that the `Fn` traits require `()` form without a feature gate.
3 fn bar1(x: &dyn Fn<(), Output=()>) {
4 //~^ ERROR of `Fn`-family traits' type parameters is subject to change
7 fn bar2<T>(x: &T) where T: Fn<()> {
8 //~^ ERROR of `Fn`-family traits' type parameters is subject to change