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      1 // RUN: %clang_cc1 -fsyntax-only -verify -Wno-objc-root-class %s
      2 // expected-no-diagnostics
      3 
      4 @interface MyParent {
      5   int X;
      6 }
      7 @end
      8 @implementation MyParent
      9 @end
     10 
     11 @interface MyParent(AA) {
     12 }
     13 @end
     14 @implementation MyParent (AA)
     15 - (void) setX: (int)in {X = in - 2;}
     16 - (int) X {return X;}
     17 @end
     18 
     19 @interface MyClass : MyParent
     20 @end
     21 @implementation MyClass
     22 @end
     23 
     24 int foo(MyClass *o) {
     25   o.X = 2;
     26   return o.X;
     27 }