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rust/src/test/ui/async-await/async-fn-nonsend.stderr

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Add more tests for async/await
2019-06-24 19:48:21 -05:00
error[E0277]: `std::rc::Rc<()>` cannot be sent between threads safely
--bless post no async_await gates in tests.
2019-08-01 20:48:43 -05:00
--> $DIR/async-fn-nonsend.rs:50:5
Add more tests for async/await
2019-06-24 19:48:21 -05:00
|
Use span label instead of note for cause in E0631
2019-08-24 16:44:43 -05:00
LL | fn assert_send(_: impl Send) {}
| ---------------------------- required by `assert_send`
...
Add more tests for async/await
2019-06-24 19:48:21 -05:00
LL | assert_send(local_dropped_before_await());
| ^^^^^^^^^^^ `std::rc::Rc<()>` cannot be sent between threads safely
|
= help: within `impl std::future::Future`, the trait `std::marker::Send` is not implemented for `std::rc::Rc<()>`
= note: required because it appears within the type `impl std::fmt::Debug`
lowering: extend temporary lifetimes around await This commit changes the HIR lowering around `await` so that temporary lifetimes are extended. Previously, await was lowered as: ```rust { let mut pinned = future; loop { match ::std::future::poll_with_tls_context(unsafe { <::std::pin::Pin>::new_unchecked(&mut pinned) }) { ::std::task::Poll::Ready(result) => break result, ::std::task::Poll::Pending => {} } yield (); } } ``` With this commit, await is lowered as: ```rust match future { mut pinned => loop { match ::std::future::poll_with_tls_context(unsafe { <::std::pin::Pin>::new_unchecked(&mut pinned) }) { ::std::task::Poll::Ready(result) => break result, ::std::task::Poll::Pending => {} } yield (); } } ``` However, this change has the following side-effects: - All temporaries in future will be considered to live across a yield for the purpose of auto-traits. - Borrowed temporaries in future are likely to be considered to be live across the yield for the purpose of the generator transform. Signed-off-by: David Wood <david@davidtw.co>
2019-09-08 15:22:51 -05:00
= note: required because it appears within the type `{impl std::fmt::Debug, fn() -> impl std::future::Future {fut}, impl std::future::Future, ()}`
= note: required because it appears within the type `[static generator@$DIR/async-fn-nonsend.rs:21:39: 26:2 {impl std::fmt::Debug, fn() -> impl std::future::Future {fut}, impl std::future::Future, ()}]`
= note: required because it appears within the type `std::future::GenFuture<[static generator@$DIR/async-fn-nonsend.rs:21:39: 26:2 {impl std::fmt::Debug, fn() -> impl std::future::Future {fut}, impl std::future::Future, ()}]>`
Add more tests for async/await
2019-06-24 19:48:21 -05:00
= note: required because it appears within the type `impl std::future::Future`
= note: required because it appears within the type `impl std::future::Future`
error[E0277]: `std::rc::Rc<()>` cannot be sent between threads safely
--bless post no async_await gates in tests.
2019-08-01 20:48:43 -05:00
--> $DIR/async-fn-nonsend.rs:52:5
Add more tests for async/await
2019-06-24 19:48:21 -05:00
|
Use span label instead of note for cause in E0631
2019-08-24 16:44:43 -05:00
LL | fn assert_send(_: impl Send) {}
| ---------------------------- required by `assert_send`
...
Add more tests for async/await
2019-06-24 19:48:21 -05:00
LL | assert_send(non_send_temporary_in_match());
| ^^^^^^^^^^^ `std::rc::Rc<()>` cannot be sent between threads safely
|
= help: within `impl std::future::Future`, the trait `std::marker::Send` is not implemented for `std::rc::Rc<()>`
= note: required because it appears within the type `impl std::fmt::Debug`
lowering: extend temporary lifetimes around await This commit changes the HIR lowering around `await` so that temporary lifetimes are extended. Previously, await was lowered as: ```rust { let mut pinned = future; loop { match ::std::future::poll_with_tls_context(unsafe { <::std::pin::Pin>::new_unchecked(&mut pinned) }) { ::std::task::Poll::Ready(result) => break result, ::std::task::Poll::Pending => {} } yield (); } } ``` With this commit, await is lowered as: ```rust match future { mut pinned => loop { match ::std::future::poll_with_tls_context(unsafe { <::std::pin::Pin>::new_unchecked(&mut pinned) }) { ::std::task::Poll::Ready(result) => break result, ::std::task::Poll::Pending => {} } yield (); } } ``` However, this change has the following side-effects: - All temporaries in future will be considered to live across a yield for the purpose of auto-traits. - Borrowed temporaries in future are likely to be considered to be live across the yield for the purpose of the generator transform. Signed-off-by: David Wood <david@davidtw.co>
2019-09-08 15:22:51 -05:00
= note: required because it appears within the type `{fn(impl std::fmt::Debug) -> std::option::Option<impl std::fmt::Debug> {std::option::Option::<impl std::fmt::Debug>::Some}, fn() -> impl std::fmt::Debug {non_send}, impl std::fmt::Debug, std::option::Option<impl std::fmt::Debug>, fn() -> impl std::future::Future {fut}, impl std::future::Future, ()}`
= note: required because it appears within the type `[static generator@$DIR/async-fn-nonsend.rs:28:40: 37:2 {fn(impl std::fmt::Debug) -> std::option::Option<impl std::fmt::Debug> {std::option::Option::<impl std::fmt::Debug>::Some}, fn() -> impl std::fmt::Debug {non_send}, impl std::fmt::Debug, std::option::Option<impl std::fmt::Debug>, fn() -> impl std::future::Future {fut}, impl std::future::Future, ()}]`
= note: required because it appears within the type `std::future::GenFuture<[static generator@$DIR/async-fn-nonsend.rs:28:40: 37:2 {fn(impl std::fmt::Debug) -> std::option::Option<impl std::fmt::Debug> {std::option::Option::<impl std::fmt::Debug>::Some}, fn() -> impl std::fmt::Debug {non_send}, impl std::fmt::Debug, std::option::Option<impl std::fmt::Debug>, fn() -> impl std::future::Future {fut}, impl std::future::Future, ()}]>`
Add more tests for async/await
2019-06-24 19:48:21 -05:00
= note: required because it appears within the type `impl std::future::Future`
= note: required because it appears within the type `impl std::future::Future`
error[E0277]: `dyn std::fmt::Write` cannot be sent between threads safely
--bless post no async_await gates in tests.
2019-08-01 20:48:43 -05:00
--> $DIR/async-fn-nonsend.rs:54:5
Add more tests for async/await
2019-06-24 19:48:21 -05:00
|
Use span label instead of note for cause in E0631
2019-08-24 16:44:43 -05:00
LL | fn assert_send(_: impl Send) {}
| ---------------------------- required by `assert_send`
...
Add more tests for async/await
2019-06-24 19:48:21 -05:00
LL | assert_send(non_sync_with_method_call());
| ^^^^^^^^^^^ `dyn std::fmt::Write` cannot be sent between threads safely
|
= help: the trait `std::marker::Send` is not implemented for `dyn std::fmt::Write`
= note: required because of the requirements on the impl of `std::marker::Send` for `&mut dyn std::fmt::Write`
= note: required because it appears within the type `std::fmt::Formatter<'_>`
= note: required because of the requirements on the impl of `std::marker::Send` for `&mut std::fmt::Formatter<'_>`
lowering: extend temporary lifetimes around await This commit changes the HIR lowering around `await` so that temporary lifetimes are extended. Previously, await was lowered as: ```rust { let mut pinned = future; loop { match ::std::future::poll_with_tls_context(unsafe { <::std::pin::Pin>::new_unchecked(&mut pinned) }) { ::std::task::Poll::Ready(result) => break result, ::std::task::Poll::Pending => {} } yield (); } } ``` With this commit, await is lowered as: ```rust match future { mut pinned => loop { match ::std::future::poll_with_tls_context(unsafe { <::std::pin::Pin>::new_unchecked(&mut pinned) }) { ::std::task::Poll::Ready(result) => break result, ::std::task::Poll::Pending => {} } yield (); } } ``` However, this change has the following side-effects: - All temporaries in future will be considered to live across a yield for the purpose of auto-traits. - Borrowed temporaries in future are likely to be considered to be live across the yield for the purpose of the generator transform. Signed-off-by: David Wood <david@davidtw.co>
2019-09-08 15:22:51 -05:00
= note: required because it appears within the type `for<'r, 's> {&'r mut std::fmt::Formatter<'s>, bool, fn() -> impl std::future::Future {fut}, impl std::future::Future, ()}`
= note: required because it appears within the type `[static generator@$DIR/async-fn-nonsend.rs:39:38: 45:2 for<'r, 's> {&'r mut std::fmt::Formatter<'s>, bool, fn() -> impl std::future::Future {fut}, impl std::future::Future, ()}]`
= note: required because it appears within the type `std::future::GenFuture<[static generator@$DIR/async-fn-nonsend.rs:39:38: 45:2 for<'r, 's> {&'r mut std::fmt::Formatter<'s>, bool, fn() -> impl std::future::Future {fut}, impl std::future::Future, ()}]>`
Add more tests for async/await
2019-06-24 19:48:21 -05:00
= note: required because it appears within the type `impl std::future::Future`
= note: required because it appears within the type `impl std::future::Future`
error[E0277]: `*mut (dyn std::ops::Fn() + 'static)` cannot be shared between threads safely
--bless post no async_await gates in tests.
2019-08-01 20:48:43 -05:00
--> $DIR/async-fn-nonsend.rs:54:5
Add more tests for async/await
2019-06-24 19:48:21 -05:00
|
Use span label instead of note for cause in E0631
2019-08-24 16:44:43 -05:00
LL | fn assert_send(_: impl Send) {}
| ---------------------------- required by `assert_send`
...
Add more tests for async/await
2019-06-24 19:48:21 -05:00
LL | assert_send(non_sync_with_method_call());
| ^^^^^^^^^^^ `*mut (dyn std::ops::Fn() + 'static)` cannot be shared between threads safely
|
= help: within `std::fmt::ArgumentV1<'_>`, the trait `std::marker::Sync` is not implemented for `*mut (dyn std::ops::Fn() + 'static)`
= note: required because it appears within the type `std::marker::PhantomData<*mut (dyn std::ops::Fn() + 'static)>`
= note: required because it appears within the type `core::fmt::Void`
= note: required because it appears within the type `&core::fmt::Void`
= note: required because it appears within the type `std::fmt::ArgumentV1<'_>`
= note: required because of the requirements on the impl of `std::marker::Send` for `std::slice::Iter<'_, std::fmt::ArgumentV1<'_>>`
= note: required because it appears within the type `std::fmt::Formatter<'_>`
= note: required because of the requirements on the impl of `std::marker::Send` for `&mut std::fmt::Formatter<'_>`
lowering: extend temporary lifetimes around await This commit changes the HIR lowering around `await` so that temporary lifetimes are extended. Previously, await was lowered as: ```rust { let mut pinned = future; loop { match ::std::future::poll_with_tls_context(unsafe { <::std::pin::Pin>::new_unchecked(&mut pinned) }) { ::std::task::Poll::Ready(result) => break result, ::std::task::Poll::Pending => {} } yield (); } } ``` With this commit, await is lowered as: ```rust match future { mut pinned => loop { match ::std::future::poll_with_tls_context(unsafe { <::std::pin::Pin>::new_unchecked(&mut pinned) }) { ::std::task::Poll::Ready(result) => break result, ::std::task::Poll::Pending => {} } yield (); } } ``` However, this change has the following side-effects: - All temporaries in future will be considered to live across a yield for the purpose of auto-traits. - Borrowed temporaries in future are likely to be considered to be live across the yield for the purpose of the generator transform. Signed-off-by: David Wood <david@davidtw.co>
2019-09-08 15:22:51 -05:00
= note: required because it appears within the type `for<'r, 's> {&'r mut std::fmt::Formatter<'s>, bool, fn() -> impl std::future::Future {fut}, impl std::future::Future, ()}`
= note: required because it appears within the type `[static generator@$DIR/async-fn-nonsend.rs:39:38: 45:2 for<'r, 's> {&'r mut std::fmt::Formatter<'s>, bool, fn() -> impl std::future::Future {fut}, impl std::future::Future, ()}]`
= note: required because it appears within the type `std::future::GenFuture<[static generator@$DIR/async-fn-nonsend.rs:39:38: 45:2 for<'r, 's> {&'r mut std::fmt::Formatter<'s>, bool, fn() -> impl std::future::Future {fut}, impl std::future::Future, ()}]>`
Add more tests for async/await
2019-06-24 19:48:21 -05:00
= note: required because it appears within the type `impl std::future::Future`
= note: required because it appears within the type `impl std::future::Future`
error: aborting due to 4 previous errors
For more information about this error, try `rustc --explain E0277`.
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