[PyQt] PyQt5 crash on error

Kyle Altendorf sda at fstab.net
Sat Oct 1 21:47:02 BST 2016

On 2016-10-01 14:19, Fredrik Averpil wrote:
> I recently found that an error generated by PyQt5 instantly crashes the 
> application instead of just printing an error to the terminal (like 
> PyQt4 and PySide does).
> With PySide2, the application freezes up completely instead of crashing 
> on the same kind of error. I created a bug report with repro code for 
> this over at the PySide project:
> https://bugreports.qt.io/browse/PYSIDE-364

For me it prints a traceback and doesn't crash.  I can click again and 
get another traceback.  I think that there is a difference between 
uncaught exceptions in normal code which will terminate the application 
and uncaught exceptions in code called by slots which falls out of that 
slot but doesn't crash the whole application.

kodi at kodi:~$ uname -a
Linux kodi 4.4.0-31-generic #50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016 
x86_64 x86_64 x86_64 GNU/Linux
kodi at kodi:~$ python3 --version
Python 3.5.2
kodi at kodi:~$ pip3 show pyqt5
Metadata-Version: 1.1
Name: PyQt5
Version: 5.7

#!/usr/bin/env python3

import sys
from PyQt5 import QtWidgets

def on_pressed():
     priknt("world")  # misspelled

app = QtWidgets.QApplication(sys.argv)
button = QtWidgets.QPushButton("Hello")

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