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      1 // RUN: %clang_cc1 -verify %s
      2 
      3 @protocol MyProto1 
      4 @optional
      5 - (void) FOO;
      6 @optional
      7 - (void) FOO;
      8 @optional 
      9 - (void) REQ;
     10 @optional
     11 @end
     12 
     13 @interface  MyProto2 <MyProto1>
     14 - (void) FOO2;
     15 - (void) FOO3;
     16 @end
     17 
     18 @implementation MyProto2
     19 - (void) FOO2{}
     20 - (void) FOO3{}
     21 @end
     22