src/test/ui/async-await/issue-70818.stderr

   1 error: future cannot be sent between threads safely
   2   --> $DIR/issue-70818.rs:4:38
   3    |
   4 LL | fn foo<T: Send, U>(ty: T, ty1: U) -> impl Future<Output = (T, U)> + Send {
   5    |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ future created by async block is not `Send`
   6    |
   7 note: captured value is not `Send`
   8   --> $DIR/issue-70818.rs:6:18
   9    |
  10 LL |     async { (ty, ty1) }
  11    |                  ^^^ has type `U` which is not `Send`
  12 help: consider restricting type parameter `U`
  13    |
  14 LL | fn foo<T: Send, U: std::marker::Send>(ty: T, ty1: U) -> impl Future<Output = (T, U)> + Send {
  15    |                  ^^^^^^^^^^^^^^^^^^^
  16
  17 error: aborting due to previous error
  18