I had a crash in my Qt application and I wanted to ask here. However, the error I am facing is very uninformative, as it occurs without an error message in the console from Python or Qt.

Although the question is general, I took the time to write an example code where you can see this type of failure:

import subprocess

with open("prueba.py", "w", encoding="utf-8") as file:
    file.write("n".join((
        "from PySide2.QtWidgets import QApplication, QWidget",
        "",
        "app = QApplication()",
        "",
        "widget = QWidget()",
        "widget.setParent(app)",
        "app.exec_()"
    )))


print(subprocess.run(["python", "-m", "prueba"]).returncode)

In which, I use subprocess in order to obtain the exit code (in this case 3221225477).

I tried:

• Although I have not read all the documentation, I read the documentation for QCoreApplication, QObject and QThread on the PySide2.QtCore page (although the latter is a Python binding, it usually includes all the methods, virtual functions, etc.).

• Search for Qt exit codes.

• I came across this answer, but I wouldn’t know how to apply it to Python or what it entails.

Therefore, how could I get the hypothetical error?