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List:       pykde
Subject:    Re: [PyQt] Qt 5.6: Segfault on exit with any QtWebKit application
From:       Florian Bruhin <me () the-compiler ! org>
Date:       2016-04-26 8:40:31
Message-ID: 20160426084031.GW2984 () tonks
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* Florian Bruhin <me@the-compiler.org> [2016-03-31 23:23:16 +0200]:
> Hey,
> 
> Since updating to Qt 5.6 (with PyQt 5.5.1), I'm getting a segfault
> when exiting from a trivial application using QtWebKit:
> 
> [...]
> 
> It happens here:
> 
> 	#0  0x00007ffff1deaab7 in QObject::disconnect (sender=0x7fff8813ff80, \
> signal=signal@entry=0x0, receiver=receiver@entry=0x7fff84010e50, \
> method=method@entry=0x0) at kernel/qobject.cpp:2949  #1  0x00007fffdba4af78 in \
> QObject::disconnect (member=0x0, receiver=0x7fff84010e50, this=<optimized out>) at \
> ../../include/QtCore/../../src/corelib/kernel/qobject.h:361  #2  \
> QDBusConnectionPrivate::closeConnection (this=this@entry=0x7fff84010e50) at \
> qdbusintegrator.cpp:1126  #3  0x00007fffdba3bb36 in QDBusConnectionManager::run \
> (this=0x7fffdbcadd00 <(anonymous \
> namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:191  \
> #4  0x00007ffff1be6de8 in QThreadPrivate::start (arg=0x7fffdbcadd00 <(anonymous \
> namespace)::Q_QGS__q_manager::innerFunction()::holder>) at \
> thread/qthread_unix.cpp:340  #5  0x00007ffff76f5424 in start_thread () from \
> /usr/lib/libpthread.so.0  #6  0x00007ffff7434cbd in clone () from \
> /usr/lib/libc.so.6

I just upgraded to PyQt 5.6 and unfortunately I'm still getting the
same.

I also found the same crash in Fedora's crash database - most of them
seem to be with PyQt5, and all of them with Qt 5.6:

https://retrace.fedoraproject.org/faf/problems/1853632/

Any idea how I could reproduce this with a pure C++ example so I can
report it upstream? I'm out of ideas...

Florian

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