clang/test/SemaObjC/duplicate-ivar-check.m

// RUN: clang -fsyntax-only -verify %s

@interface B1 {
@public
  double fill_B;	// expected-note {{previous definition is here}}
}
@end

@interface B : B1 {
@public
  int one;	// expected-note {{previous definition is here}}
  int one;	// expected-error {{duplicate member 'one'}}
}
@end

@interface A : B {
@public
  int fill_B;	// expected-error {{duplicate member 'fill_B'}}
}
@end