Python3 PyQt5 setEnabled of a QAction导致崩溃

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QAction

class MyWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        self.initUI()

    def initUI(self):
        self.setWindowTitle("My Window")
        self.setGeometry(100, 100, 300, 200)

        action = QAction("My Action", self)
        action.setEnabled(False)  # 设置QAction为不可用状态

        menu = self.menuBar()
        menu.addAction(action)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = MyWindow()
    window.show()
    sys.exit(app.exec_())