1 error[E0277]: the trait bound `U: std::marker::Copy` is not satisfied
2 --> $DIR/wf-fn-where-clause.rs:18:1
4 LL | / fn foo<T,U>() where T: ExtraCopy<U> //~ ERROR E0277
7 | |_^ the trait `std::marker::Copy` is not implemented for `U`
9 = help: consider adding a `where U: std::marker::Copy` bound
10 note: required by `ExtraCopy`
11 --> $DIR/wf-fn-where-clause.rs:16:1
13 LL | trait ExtraCopy<T:Copy> { }
14 | ^^^^^^^^^^^^^^^^^^^^^^^
16 error[E0277]: the size for values of type `(dyn std::marker::Copy + 'static)` cannot be known at compilation time
17 --> $DIR/wf-fn-where-clause.rs:22:1
19 LL | fn bar() where Vec<dyn Copy>:, {}
20 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
22 = help: the trait `std::marker::Sized` is not implemented for `(dyn std::marker::Copy + 'static)`
23 = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
24 = note: required by `std::vec::Vec`
26 error[E0038]: the trait `std::marker::Copy` cannot be made into an object
27 --> $DIR/wf-fn-where-clause.rs:22:1
29 LL | fn bar() where Vec<dyn Copy>:, {}
30 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::marker::Copy` cannot be made into an object
32 = note: the trait cannot require that `Self : Sized`
34 error: aborting due to 3 previous errors
36 Some errors occurred: E0038, E0277.
37 For more information about an error, try `rustc --explain E0038`.