error: `MutexGuard` held across a suspend point, but should not be --> $DIR/mutex.rs:8:9 | LL | let _guard = m.lock().unwrap(); | ^^^^^^ LL | other().await; | ----- the value is held across this suspend point | note: holding a MutexGuard across suspend points can cause deadlocks, delays, and cause Futures to not implement `Send` --> $DIR/mutex.rs:8:9 | LL | let _guard = m.lock().unwrap(); | ^^^^^^ help: consider using a block (`{ ... }`) to shrink the value's scope, ending before the suspend point --> $DIR/mutex.rs:8:9 | LL | let _guard = m.lock().unwrap(); | ^^^^^^ note: the lint level is defined here --> $DIR/mutex.rs:3:9 | LL | #![deny(must_not_suspend)] | ^^^^^^^^^^^^^^^^ error: aborting due to 1 previous error