test/SemaObjC/warn-weak-field.m

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

struct S {
	__weak id w; // expected-warning {{__weak attribute cannot be specified on a field declaration}}
	__strong id p1;
};

@interface I
{
   __weak id w;	// OK
   __strong id LHS;
}
- (void) foo;
@end
@implementation I
- (void) foo { w = 0; LHS = w; }
@end

int main ()
{
	struct I {
        __weak id w1;  // expected-warning {{__weak attribute cannot be specified on a field declaration}}
	};
}