Bug 284869

Application: systemsettings (1.0)
KDE Platform Version: 4.7.2 (4.7.2)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-12-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
On upgrading to KDE 4.7.2 from 4.7.1 in kubuntu 11.10, printing stopped working. So I reinstalled the printer system applet, and did a test print. It crashed System Settings. In fact, most actions from the printer configuration crash it. Meanwhile, even CUPS on localhost:631 won't print anything - the file dissappears.

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f1ab2782780 (LWP 15436))]

Thread 2 (Thread 0x7f1a9cf9d700 (LWP 15438)):
#0  0x00007f1aafc52773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f1aad510f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f1aad511429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1ab03baf3e in QEventDispatcherGlib::processEvents (this=0x11c9560, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f1ab038ecf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f1ab038eef7 in QEventLoop::exec (this=0x7f1a9cf9cdd0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f1ab02a627f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f1ab0371cbf in QInotifyFileSystemWatcherEngine::run (this=0x11d07e0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f1ab02a8d05 in QThreadPrivate::start (arg=0x11d07e0) at thread/qthread_unix.cpp:331
#9  0x00007f1aad9e2efc in start_thread (arg=0x7f1a9cf9d700) at pthread_create.c:304
#10 0x00007f1aafc5e89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f1ab2782780 (LWP 15436)):
[KCrash Handler]
#6  0x00007f1a972740f5 in QHash<void*, PyQtProxy*>::duplicateNode(QHashData::Node*, void*) () from /usr/lib/python2.7/dist-packages/PyQt4/QtCore.so
#7  0x00007f1ab02c4637 in QHashData::detach_helper2 (this=0x176ef90, node_duplicate=0x7f1a972740f0 <QHash<void*, PyQtProxy*>::duplicateNode(QHashData::Node*, void*)>, node_delete=0x7f1a972740e0 <QHash<void*, PyQtProxy*>::deleteNode2(QHashData::Node*)>, nodeSize=<optimized out>, nodeAlign=8) at tools/qhash.cpp:235
#8  0x00007f1a97278ca7 in sipQtFindSipslot () from /usr/lib/python2.7/dist-packages/PyQt4/QtCore.so
#9  0x00007f1a96eeb71e in sipWrapper_traverse (arg=0x0, visit=0x7f1a9c1ca620 <visit_decref>, self=0x186f200) at /build/buildd/sip4-4.12.4/siplib/siplib.c:9648
#10 sipWrapper_traverse (self=0x186f200, visit=0x7f1a9c1ca620 <visit_decref>, arg=0x0) at /build/buildd/sip4-4.12.4/siplib/siplib.c:9629
#11 0x00007f1a9c1ca8c7 in subtract_refs (containers=0x7f1a9c54ac80) at ../Modules/gcmodule.c:345
#12 collect (generation=2) at ../Modules/gcmodule.c:874
#13 0x00007f1a9c1cb5e4 in PyGC_Collect () at ../Modules/gcmodule.c:1386
#14 0x00007f1a9c1b7aa6 in Py_Finalize () at ../Python/pythonrun.c:437
#15 Py_Finalize () at ../Python/pythonrun.c:393
#16 0x00007f1a9c5979e5 in KPythonPluginFactory::~KPythonPluginFactory (this=0x12d90a0, __in_chrg=<optimized out>) at ../../kpythonpluginfactory/kpythonpluginfactory.cpp:262
#17 0x00007f1a9c597a49 in KPythonPluginFactory::~KPythonPluginFactory (this=0x12d90a0, __in_chrg=<optimized out>) at ../../kpythonpluginfactory/kpythonpluginfactory.cpp:268
#18 0x00007f1ab03a8926 in QObjectCleanupHandler::clear (this=0xfdc290) at kernel/qobjectcleanuphandler.cpp:140
#19 0x00007f1ab03a896b in QObjectCleanupHandler::~QObjectCleanupHandler (this=0xfdc290, __in_chrg=<optimized out>) at kernel/qobjectcleanuphandler.cpp:86
#20 0x00007f1ab03a89b9 in QObjectCleanupHandler::~QObjectCleanupHandler (this=0xfdc290, __in_chrg=<optimized out>) at kernel/qobjectcleanuphandler.cpp:87
#21 0x00007f1aafbb8821 in __run_exit_handlers (status=1, listp=0x7f1aaff155a8, run_list_atexit=true) at exit.c:78
#22 0x00007f1aafbb88a5 in __GI_exit (status=<optimized out>) at exit.c:100
#23 0x00007f1a90f70b9e in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
#24 0x00007f1aaefb706f in _XError () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#25 0x00007f1aaefb3e21 in ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#26 0x00007f1aaefb4d77 in _XReply () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#27 0x00007f1aaef9934b in XGetWindowProperty () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#28 0x00007f1ab1e5f71b in NETWinInfo::update (this=0x7fffafa0c570, dirty_props=<optimized out>) at ../../kdeui/windowmanagement/netwm.cpp:3962
#29 0x00007f1ab1e60ee6 in NETWinInfo::event (this=0x7fffafa0c570, event=0x7fffafa0c620, properties=0x7fffafa0c540, properties_size=2) at ../../kdeui/windowmanagement/netwm.cpp:3925
#30 0x00007f1ab1e55fc8 in KWindowSystemPrivate::x11Event (this=0x12f1db0, ev=0x7fffafa0c620) at ../../kdeui/windowmanagement/kwindowsystem_x11.cpp:198
#31 0x00007f1ab1d460a6 in publicX11Event (e=0x7fffafa0c620, this=<optimized out>) at ../../kdeui/kernel/ksystemeventfilter.cpp:43
#32 KSystemEventFilterPrivate::filterEvent (this=0x12f00c0, message=0x7fffafa0c620) at ../../kdeui/kernel/ksystemeventfilter.cpp:102
#33 0x00007f1ab10b1388 in x11EventSourceDispatch (s=0xbdda90, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:143
#34 0x00007f1aad510a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007f1aad511258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007f1aad511429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007f1ab03baed6 in QEventDispatcherGlib::processEvents (this=0xbb3a10, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#38 0x00007f1ab10b107e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#39 0x00007f1ab038ecf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#40 0x00007f1ab038eef7 in QEventLoop::exec (this=0x7fffafa0c9f0, flags=...) at kernel/qeventloop.cpp:201
#41 0x00007f1ab0393789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#42 0x000000000040a7c5 in main (argc=5, argv=0x7fffafa0cd28) at ../../../systemsettings/app/main.cpp:49

This bug may be a duplicate of or related to bug 283611.

Possible duplicates by query: bug 284837, bug 284804, bug 284786, bug 284760, bug 284730.

Reported using DrKonqi