1// RUN: %clang_cc1  -fsyntax-only -verify %s
2// expected-no-diagnostics
3
4@interface MessageStore
5@property (assign, readonly) int P;
6@end
7
8@interface MessageStore (CAT)
9@property (assign) int P;
10@end
11
12@interface  NeXTMbox : MessageStore
13@end
14
15@implementation NeXTMbox
16- (void) Meth { self.P = 1; }
17@end
18
19