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