// RUN: %clang_cc1 -verify -Wno-objc-root-class %s
// expected-no-diagnostics
@protocol MyProto1
@optional
- (void) FOO;
@optional
- (void) FOO1;
@optional
- (void) REQ;
@optional
@end
@interface MyProto2 <MyProto1>
- (void) FOO2;
- (void) FOO3;
@end
@implementation MyProto2
- (void) FOO2{}
- (void) FOO3{}
@end