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//@ check-pass //@ compile-flags: -Znext-solver #![feature(const_trait_impl)] #[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() {}