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1// RUN: %clang_cc1 -fsyntax-only -verify -Wno-objc-root-class %s2 3@interface PBXTrackableTaskManager @end4 5@implementation PBXTrackableTaskManager6- (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@end13 14 15struct x { int a; } b;16 17void test1(void) {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