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// check-pass #![feature(associated_type_bounds)] #![feature(impl_trait_in_assoc_type)] fn main() {} trait Bar { type Assoc; } trait Thing { type Out; fn func() -> Self::Out; } struct AssocIsCopy; impl Bar for AssocIsCopy { type Assoc = u8; } impl Thing for AssocIsCopy { type Out = impl Bar<Assoc: Copy>; fn func() -> Self::Out { AssocIsCopy } }