PyQt5 segfault test

pyqt-delete-later-test.py

from concurrent.futures import ThreadPoolExecutor

from PyQt5.QtCore import Qt, QObject, QCoreApplication
from PyQt5.QtCore import QMetaObject


class TestObject(QObject):
    def event(self, event):
        return super().event(event)

executor = ThreadPoolExecutor()
app = QCoreApplication([])

def test(parent=None):
    obj = TestObject(parent)

    def run():
        nonlocal obj  # capture obj in the run's closure
        ...

    f = executor.submit(run)

    # run the event loop until future's completion
    @f.add_done_callback
    def quit(f):
        QMetaObject.invokeMethod(app, "quit", Qt.QueuedConnection)
    app.exec()

    obj.deleteLater()  # delete the object from the event queue

iter_n = 0

while True:
    test(parent=app)
    iter_n += 1
    if iter_n % 10 == 0:
        print("iter:", iter_n)