[PyQt] Qt 5.6: Segfault on exit with any QtWebKit application

[Florian Bruhin]

* Florian Bruhin <me at 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 at entry=0x0, receiver=receiver at entry=0x7fff84010e50, method=method at 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 at 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

-- 
http://www.the-compiler.org | me at the-compiler.org (Mail/XMPP)
   GPG: 916E B0C8 FD55 A072 | http://the-compiler.org/pubkey.asc
         I love long mails! | http://email.is-not-s.ms/
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 819 bytes
Desc: Digital signature
URL: <https://www.riverbankcomputing.com/pipermail/pyqt/attachments/20160426/a36d2151/attachment.sig>