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/* Ensure there are no bizarre difficulties with accessing the 'isa' field of objects.  */
/* { dg-do compile { target *-*-darwin* } } */
 
#include <objc/Object.h>
 
@interface Object (Test)
- (Class) test1: (id)object;
@end
 
@interface Derived: Object
- (Class) test2: (id)object;
@end
 
@implementation Object (Test)
 
Class test1(id object) {
    Class cls = object->isa;
    return cls;
}
- (Class) test1: (id)object {
    Class cls = object->isa;
    return cls;
}
 
@end
 
@implementation Derived
 
Class test2(id object) {
    Class cls = object->isa;
    return cls;
}
- (Class) test2: (id)object {
    Class cls = object->isa;
    return cls;
}
 
@end
 
Class test3(id object) {
    Class cls = object->isa;
    return cls;
}