src/test/ui/wf/wf-in-fn-where-clause.stderr

error[E0277]: the trait bound `U: std::marker::Copy` is not satisfied
  --> $DIR/wf-in-fn-where-clause.rs:9:1
   |
LL |   trait MustBeCopy<T:Copy> {
   |   ------------------------ required by `MustBeCopy`
...
LL | / fn bar<T,U>()
LL | |     where T: MustBeCopy<U>
   | |                           - help: consider further restricting type parameter `U`: `, U: std::marker::Copy`
LL | | {
LL | | }
   | |_^ the trait `std::marker::Copy` is not implemented for `U`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0277`.