| error: future cannot be sent between threads safely |
| --> $DIR/issue-71137.rs:20:3 |
| | |
| LL | fn fake_spawn<F: Future + Send + 'static>(f: F) { } |
| | ---- required by this bound in `fake_spawn` |
| ... |
| LL | fake_spawn(wrong_mutex()); |
| | ^^^^^^^^^^ future returned by `wrong_mutex` is not `Send` |
| | |
| = help: within `impl std::future::Future`, the trait `std::marker::Send` is not implemented for `std::sync::MutexGuard<'_, i32>` |
| note: future is not `Send` as this value is used across an await |
| --> $DIR/issue-71137.rs:12:5 |
| | |
| LL | let mut guard = m.lock().unwrap(); |
| | --------- has type `std::sync::MutexGuard<'_, i32>` which is not `Send` |
| LL | (async { "right"; }).await; |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^ await occurs here, with `mut guard` maybe used later |
| LL | *guard += 1; |
| LL | } |
| | - `mut guard` is later dropped here |
| |
| error: aborting due to previous error |
| |
