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// check-pass #![feature(const_trait_impl, effects)] #[const_trait] trait Foo { fn a(&self); } #[const_trait] trait Bar: ~const Foo {} struct S; impl const Foo for S { fn a(&self) {} } impl const Bar for S {} const fn foo<T: ~const Bar>(t: &T) { t.a(); } const _: () = foo(&S); fn main() {}