// RUN: clang-cc -verify -fsyntax-only %s @class NSString; @interface A -t1 __attribute__((noreturn)); - (NSString *)stringByAppendingFormat:(NSString *)format, ... __attribute__((format(__NSString__, 1, 2))); -(void) m0 __attribute__((noreturn)); -(void) m1 __attribute__((unused)); @end