1// RUN: %clang_cc1 -fsyntax-only -verify -Wno-objc-root-class %s
2
3@interface PBXTrackableTaskManager @end
4
5@implementation PBXTrackableTaskManager
6- (id) init { return 0; }
7- (void) unregisterTask:(id) task {
8  @synchronized (self) {
9  id taskID = [task taskIdentifier];  // expected-warning {{method '-taskIdentifier' not found (return type defaults to 'id')}}
10  }
11}
12@end
13
14
15struct x { int a; } b;
16
17void test1() {
18  @synchronized (b) {  // expected-error {{@synchronized requires an Objective-C object type ('struct x' invalid)}}
19  }
20
21  @synchronized (42) {  // expected-error {{@synchronized requires an Objective-C object type ('int' invalid)}}
22  }
23}
24