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

Valentin Valls valentin.valls at esrf.fr
Mon Nov 27 12:20:42 GMT 2017


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

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
#3  0x00007fffd475c4d9 in ?? () from
#4  0x00007ffff2519b6d in g_main_context_dispatch () from
#5  0x00007ffff2519f48 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007ffff2519ffc in g_main_context_iteration () from
#7  0x00007ffff50ff36f in
() from
#8  0x00007ffff50aa05a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
#9  0x00007ffff50b2964 in QCoreApplication::exec() () from
#10 0x00007fffe8270be0 in meth_QApplication_exec_ () from
#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.


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