[PyQt] Segfault using QFileDialog with PyQt 5.x manylinux

[Valentin Valls]

A little more information in case it helps.

I test it on 5 different computers:

- Debian 8:
    - Python 3.4 (official) no segfault (2 computers)
    - Python 3.5 (own) segfault (2 computers)
    - Python 3.6 (own) segfault (1 computer)
- Debian 9:
    - Python 3.5 (official) segfault (1 computer)

Maybe it have something to do with Python>=3.5?


On 11/27/2017 01:20 PM, Valentin Valls wrote:
> Hi,
>
> Here is a segfault on Linux (Debian 8) using the last PyQt5.9.2, and an
> own compiled Python 3.5.
>
> I try to read the sidebar urls from a QFileDialog, but i don't need the
> QFileDialog widget.
>
> Here is a program:
>
> from PyQt5 import Qt
> def main():
>     qapp = Qt.QApplication([])
>     d = Qt.QFileDialog()
>     # Here i only need to read the sidebar urls
>     # urls = d.sidebarUrls()
>     d = None
>     qapp.exec_()
> main()
>
> Here is part of the backtrace:
>
> #0  0x00007fffd50c6c16 in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
> #1  0x00007fffd50cb56a in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
> #2  0x00007fffd475c4bb in ?? () from
> /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
> #3  0x00007fffd475c4d9 in ?? () from
> /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
> #4  0x00007ffff2519b6d in g_main_context_dispatch () from
> /lib/x86_64-linux-gnu/libglib-2.0.so.0
> #5  0x00007ffff2519f48 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
> #6  0x00007ffff2519ffc in g_main_context_iteration () from
> /lib/x86_64-linux-gnu/libglib-2.0.so.0
> #7  0x00007ffff50ff36f in
> QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
> () from
> /workspace/valls/env/py35-pyqt5/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Core.so.5
> #8  0x00007ffff50aa05a in
> QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
> /workspace/valls/env/py35-pyqt5/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Core.so.5
> #9  0x00007ffff50b2964 in QCoreApplication::exec() () from
> /workspace/valls/env/py35-pyqt5/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Core.so.5
> #10 0x00007fffe8270be0 in meth_QApplication_exec_ () from
> /workspace/valls/env/py35-pyqt5/lib/python3.5/site-packages/PyQt5/QtWidgets.so
> #11 0x00000000005a3459 in PyCFunction_Call
> (func=func at entry=0x7fffed6e9750, args=args at entry=0x7ffff7e04048,
> kwds=kwds at entry=0x0) at Objects/methodobject.c:109
>
> Here is pip list:
>
> - PyQt5 (5.9.2)
> - sip (4.19.6)
>
> I also try to use close, DeleteOnClose, deleteLater, but without success.
>
> I don't have any problems with PyQt4, or PyQt5 on Windows. I also try
> PyQt 5.6, 5.7, 5.8 with always a segfault.
>
> Any work around is also welcome.
>
> Regards,
>
>
>
> _______________________________________________
> PyQt mailing list    PyQt at riverbankcomputing.com
> https://www.riverbankcomputing.com/mailman/listinfo/pyqt

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