malloc_error在呈现imagepicker控制器时

Question

我在尝试调试malloc错误/内存泄漏时遇到问题。下面是我的代码：

class UploadPostController: UITableViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate, TOCropViewControllerDelegate {

var myPickerController : UIImagePickerController?

override func viewDidLoad() {
    super.viewDidLoad()

}

override func viewWillLayoutSubviews() {
    setupNavBarButtons()
}

func setupNavBarButtons() {
    let uploadBarButtonItem = UIBarButtonItem(title: "Upload", style: .plain, target: self, action: #selector(displayImagePickerButtonTapped))
    navigationItem.rightBarButtonItem = uploadBarButtonItem
}

func displayImagePickerButtonTapped() {

    myPickerController = UIImagePickerController()
    myPickerController?.delegate = self
    myPickerController?.sourceType = UIImagePickerControllerSourceType.photoLibrary
    self.present(myPickerController!, animated: true, completion: nil) // crashes here.
}

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {

    if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage{
        let cropVC = TOCropViewController(image: pickedImage)
        cropVC.delegate = self
        cropVC.aspectRatioPickerButtonHidden = true
        cropVC.aspectRatioPreset = .presetSquare
        cropVC.aspectRatioLockEnabled = true
        cropVC.resetAspectRatioEnabled = false
        myPickerController?.pushViewController(cropVC, animated: true)
    }
}

func cropViewController(_ cropViewController: TOCropViewController, didCropToImage image: UIImage, rect cropRect: CGRect, angle: Int) {
    self.arrayOfCroppedImages.append(image)
    dismiss(animated: true, completion: nil)
    myPickerController = nil
}
}

我已经从文件中删除了很多代码，因为我无法看到任何其他相关内容。当我试图呈现UIImagePickerController

时，它会崩溃

我设置了一个malloc_error_break断点，这就是我得到的

崩溃是完全随机的。大约有15％的可能性发生