dismissViewControllerAnimated仅在iOS 7.1中导致EXC_BAD_ACCESS

ViewControllerAViewControllerB使用模态segue 打开.

ViewControllerA:

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
    // ModalSegue is defined in the storyboard to point to ViewControllerB
    [self performSegueWithIdentifier:@"ModalSegue" sender:self];
}

ViewControllerB:

- (IBAction)cancelButtonTapped:(id)sender
{
    [self dismissViewControllerAnimated:YES completion:nil]; // Causes crash
}

在iOS 7.1中,这会导致EXC_BAD_ACCESS崩溃.如果Zombie Objects已启用,则抛出异常:

*** -[ViewControllerB respondsToSelector:]: message sent to deallocated instance 0x12ed7e170

在iOS 7.0中,这可以按预期工作.

有任何想法吗？

编辑:按照LeoNatan的要求,这里的的堆栈跟踪dealloc的方法ViewControllerB: