[rustc.git] / src / test / ui / async-await / issue-70818.stderr

error: future cannot be sent between threads safely
  --> $DIR/issue-70818.rs:4:38
   |
LL | fn foo<T: Send, U>(ty: T, ty1: U) -> impl Future<Output = (T, U)> + Send {
   |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ future created by async block is not `Send`
LL |
LL |     async { (ty, ty1) }
   |     ------------------- this returned value is of type `impl std::future::Future`
   |
   = help: within `impl std::future::Future`, the trait `std::marker::Send` is not implemented for `U`
note: captured value is not `Send`
  --> $DIR/issue-70818.rs:6:18
   |
LL |     async { (ty, ty1) }
   |                  ^^^ has type `U` which is not `Send`
   = note: the return type of a function must have a statically known size
help: consider restricting type parameter `U`
   |
LL | fn foo<T: Send, U: std::marker::Send>(ty: T, ty1: U) -> impl Future<Output = (T, U)> + Send {
   |                  ^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error
Commit	Line	Data
f9f354fc XL	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	LL \|
	7	LL \| async { (ty, ty1) }
	8	\| ------------------- this returned value is of type `impl std::future::Future`
	9	\|
	10	= help: within `impl std::future::Future`, the trait `std::marker::Send` is not implemented for `U`
	11	note: captured value is not `Send`
	12	--> $DIR/issue-70818.rs:6:18
	13	\|
	14	LL \| async { (ty, ty1) }
	15	\| ^^^ has type `U` which is not `Send`
	16	= note: the return type of a function must have a statically known size
	17	help: consider restricting type parameter `U`
	18	\|
	19	LL \| fn foo<T: Send, U: std::marker::Send>(ty: T, ty1: U) -> impl Future<Output = (T, U)> + Send {
	20	\| ^^^^^^^^^^^^^^^^^^^
	21
	22	error: aborting due to previous error
	23