Cannot find any useful information

[magic3584]

I have a complicated viewController, and I use this in function like this:

    FBRetainCycleDetector *detector = [FBRetainCycleDetector new];
    [detector addCandidate:self];
    NSSet *retainCycles = [detector findRetainCycles];
    NSLog(@"%@", retainCycles);
    [self dismissViewControllerAnimated:YES completion:nil];

But the controller's dealloc function not called and I cannot find any useful information

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