1 files changed, 23 insertions, 0 deletions
diff --git a/test/SemaObjC/synchronized.m b/test/SemaObjC/synchronized.m
new file mode 100644
index 000000000000..7131265b5bb7
--- /dev/null
+++ b/test/SemaObjC/synchronized.m
@@ -0,0 +1,23 @@
+// RUN: clang-cc -fsyntax-only -verify %s
+
+@interface PBXTrackableTaskManager @end
+
+@implementation PBXTrackableTaskManager
+- (id) init {}
+- (void) unregisterTask:(id) task {
+  @synchronized (self) {
+  id taskID = [task taskIdentifier];  // expected-warning {{method '-taskIdentifier' not found (return type defaults to 'id')}}
+  }
+}
+@end
+
+
+struct x { int a; } b;
+
+void test1() {
+  @synchronized (b) {  // expected-error {{@synchronized requires an Objective-C object type ('struct x' invalid)}}
+  }
+
+  @synchronized (42) {  // expected-error {{@synchronized requires an Objective-C object type ('int' invalid)}}
+  }
+}