-error[E0277]: `std::rc::Rc<()>` cannot be sent between threads safely
- --> $DIR/async-fn-nonsend.rs:50:5
+error: future cannot be sent between threads safely
+ --> $DIR/async-fn-nonsend.rs:49:5
|
LL | fn assert_send(_: impl Send) {}
- | ----------- ---- required by this bound in `assert_send`
+ | ---- required by this bound in `assert_send`
...
LL | assert_send(local_dropped_before_await());
- | ^^^^^^^^^^^ `std::rc::Rc<()>` cannot be sent between threads safely
+ | ^^^^^^^^^^^ future returned by `local_dropped_before_await` is not `Send`
|
- = help: within `impl std::future::Future`, the trait `std::marker::Send` is not implemented for `std::rc::Rc<()>`
- = note: required because it appears within the type `impl std::fmt::Debug`
- = note: required because it appears within the type `{impl std::fmt::Debug, impl std::future::Future, impl std::future::Future, ()}`
- = note: required because it appears within the type `[static generator@$DIR/async-fn-nonsend.rs:21:39: 26:2 {impl std::fmt::Debug, impl std::future::Future, 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, impl std::future::Future, impl std::future::Future, ()}]>`
- = note: required because it appears within the type `impl std::future::Future`
- = note: required because it appears within the type `impl std::future::Future`
+ = help: within `impl Future`, the trait `Send` is not implemented for `Rc<()>`
+note: future is not `Send` as this value is used across an await
+ --> $DIR/async-fn-nonsend.rs:24:5
+ |
+LL | let x = non_send();
+ | - has type `impl Debug` which is not `Send`
+LL | drop(x);
+LL | fut().await;
+ | ^^^^^^^^^^^ await occurs here, with `x` maybe used later
+LL | }
+ | - `x` is later dropped here
-error[E0277]: `std::rc::Rc<()>` cannot be sent between threads safely
- --> $DIR/async-fn-nonsend.rs:52:5
+error: future cannot be sent between threads safely
+ --> $DIR/async-fn-nonsend.rs:51:5
|
LL | fn assert_send(_: impl Send) {}
- | ----------- ---- required by this bound in `assert_send`
+ | ---- required by this bound in `assert_send`
...
LL | assert_send(non_send_temporary_in_match());
- | ^^^^^^^^^^^ `std::rc::Rc<()>` cannot be sent between threads safely
+ | ^^^^^^^^^^^ future returned by `non_send_temporary_in_match` is not `Send`
|
- = help: within `impl std::future::Future`, the trait `std::marker::Send` is not implemented for `std::rc::Rc<()>`
- = note: required because it appears within the type `impl std::fmt::Debug`
- = note: required because it appears within the type `{impl std::fmt::Debug, std::option::Option<impl std::fmt::Debug>, impl std::future::Future, impl std::future::Future, ()}`
- = note: required because it appears within the type `[static generator@$DIR/async-fn-nonsend.rs:28:40: 37:2 {impl std::fmt::Debug, std::option::Option<impl std::fmt::Debug>, impl std::future::Future, 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 {impl std::fmt::Debug, std::option::Option<impl std::fmt::Debug>, impl std::future::Future, impl std::future::Future, ()}]>`
- = 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
- --> $DIR/async-fn-nonsend.rs:54:5
+ = help: within `impl Future`, the trait `Send` is not implemented for `Rc<()>`
+note: future is not `Send` as this value is used across an await
+ --> $DIR/async-fn-nonsend.rs:33:20
|
-LL | fn assert_send(_: impl Send) {}
- | ----------- ---- required by this bound in `assert_send`
+LL | match Some(non_send()) {
+ | ---------- has type `impl Debug` which is not `Send`
+LL | Some(_) => fut().await,
+ | ^^^^^^^^^^^ await occurs here, with `non_send()` maybe used later
...
-LL | assert_send(non_sync_with_method_call());
- | ^^^^^^^^^^^ `dyn std::fmt::Write` cannot be sent between threads safely
- |
- = help: the trait `std::marker::Send` is not implemented for `dyn std::fmt::Write`
- = note: required because of the requirements on the impl of `std::marker::Send` for `&mut dyn std::fmt::Write`
- = note: required because it appears within the type `std::fmt::Formatter<'_>`
- = note: required because of the requirements on the impl of `std::marker::Send` for `&mut std::fmt::Formatter<'_>`
- = note: required because it appears within the type `for<'r, 's> {&'r mut std::fmt::Formatter<'s>, bool, bool, impl std::future::Future, impl std::future::Future, ()}`
- = note: required because it appears within the type `[static generator@$DIR/async-fn-nonsend.rs:39:38: 45:2 for<'r, 's> {&'r mut std::fmt::Formatter<'s>, bool, bool, impl std::future::Future, 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, bool, impl std::future::Future, impl std::future::Future, ()}]>`
- = note: required because it appears within the type `impl std::future::Future`
- = note: required because it appears within the type `impl std::future::Future`
+LL | }
+ | - `non_send()` is later dropped here
-error[E0277]: `*mut (dyn std::ops::Fn() + 'static)` cannot be shared between threads safely
- --> $DIR/async-fn-nonsend.rs:54:5
+error: future cannot be sent between threads safely
+ --> $DIR/async-fn-nonsend.rs:53:5
|
LL | fn assert_send(_: impl Send) {}
- | ----------- ---- required by this bound in `assert_send`
+ | ---- required by this bound in `assert_send`
...
LL | assert_send(non_sync_with_method_call());
- | ^^^^^^^^^^^ `*mut (dyn std::ops::Fn() + 'static)` cannot be shared between threads safely
+ | ^^^^^^^^^^^ future returned by `non_sync_with_method_call` is not `Send`
+ |
+ = help: the trait `Send` is not implemented for `dyn std::fmt::Write`
+note: future is not `Send` as this value is used across an await
+ --> $DIR/async-fn-nonsend.rs:42:9
|
- = help: within `std::fmt::ArgumentV1<'_>`, the trait `std::marker::Sync` is not implemented for `*mut (dyn std::ops::Fn() + 'static)`
- = note: required because it appears within the type `std::marker::PhantomData<*mut (dyn std::ops::Fn() + 'static)>`
- = note: required because it appears within the type `core::fmt::Void`
- = note: required because it appears within the type `&core::fmt::Void`
- = note: required because it appears within the type `std::fmt::ArgumentV1<'_>`
- = note: required because of the requirements on the impl of `std::marker::Send` for `std::slice::Iter<'_, std::fmt::ArgumentV1<'_>>`
- = note: required because it appears within the type `std::fmt::Formatter<'_>`
- = note: required because of the requirements on the impl of `std::marker::Send` for `&mut std::fmt::Formatter<'_>`
- = note: required because it appears within the type `for<'r, 's> {&'r mut std::fmt::Formatter<'s>, bool, bool, impl std::future::Future, impl std::future::Future, ()}`
- = note: required because it appears within the type `[static generator@$DIR/async-fn-nonsend.rs:39:38: 45:2 for<'r, 's> {&'r mut std::fmt::Formatter<'s>, bool, bool, impl std::future::Future, 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, bool, impl std::future::Future, impl std::future::Future, ()}]>`
- = note: required because it appears within the type `impl std::future::Future`
- = note: required because it appears within the type `impl std::future::Future`
+LL | let f: &mut std::fmt::Formatter = panic!();
+ | - has type `&mut Formatter<'_>` which is not `Send`
+LL | if non_sync().fmt(f).unwrap() == () {
+LL | fut().await;
+ | ^^^^^^^^^^^ await occurs here, with `f` maybe used later
+LL | }
+LL | }
+ | - `f` is later dropped here
-error: aborting due to 4 previous errors
+error: aborting due to 3 previous errors
-For more information about this error, try `rustc --explain E0277`.
projects / rustc.git / blobdiff