darling-objc4/test/associationForbidden3.m

// TEST_CRASHES
/*
TEST_RUN_OUTPUT
Associated object is 0x[0-9a-fA-F]+
objc\[\d+\]: objc_setAssociatedObject called on instance \(0x[0-9a-fA-F]+\) of class ForbiddenSubclass which does not allow associated objects
objc\[\d+\]: HALTED
END
*/

#include "associationForbidden.h"

@interface ForbiddenSubclass : Forbidden
@end
@implementation ForbiddenSubclass
@end

void test(void)
{
    ShouldSucceed([Normal alloc]);
    ShouldSucceed([ForbiddenSubclass alloc]);
}