I've got the following class that is a wrapper around an ABPerson (ABRecordRef):

@interface Recipient : NSObject {
    ABRecordRef person;
}

- (id)initWithPerson:(ABRecordRef)person;

@end

@implementation 

- (id)initWithPerson:(ABRecordRef)_person {
    if(self = [super init]) person = CFRetain(_person);
    return self;
}

- (void)dealloc {
    if(person) CFRelease(person);

    [super dealloc];
}

@end

I've left some of the methods out, but they aren't relevant to this question.

Everything works fine, except I get an EXC_BAD_ACCESS on the if(person) CFRelease(person); line. Why does this happen? I'm not calling CFRelease or CFRetain at all anywhere else in my app.