1 files changed, 26 insertions, 0 deletions
diff --git a/src/test/ui/lint/must_not_suspend/mutex.stderr b/src/test/ui/lint/must_not_suspend/mutex.stderr
new file mode 100644
index 000000000..a968b7ca0
--- /dev/null
+++ b/src/test/ui/lint/must_not_suspend/mutex.stderr
@@ -0,0 +1,26 @@
+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: the lint level is defined here
+  --> $DIR/mutex.rs:3:9
+   |
+LL | #![deny(must_not_suspend)]
+   |         ^^^^^^^^^^^^^^^^
+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();
+   |         ^^^^^^
+
+error: aborting due to previous error
+