error[E0277]: the trait bound `T: Copy` is not satisfied --> $DIR/issue-27675-unchecked-bounds.rs:15:12 | LL | copy::>(t) | ^^^^^^^^^^^^^^^^^ the trait `Copy` is not implemented for `T` | note: required by a bound in `copy` --> $DIR/issue-27675-unchecked-bounds.rs:10:12 | LL | fn copy(from: &U::From) -> U::From { | ^^^^^ required by this bound in `copy` help: consider restricting type parameter `T` | LL | pub fn copy_any(t: &T) -> T { | +++++++++++++++++++ error: aborting due to previous error For more information about this error, try `rustc --explain E0277`.