Bug 276505

Application: plasma-desktop (0.4)
KDE Platform Version: 4.6.4 (4.6.4)
Qt Version: 4.7.3
Operating System: Linux 2.6.39-2-amd64 x86_64
Distribution: Debian GNU/Linux unstable (sid)

-- Information about the crash:
- What I was doing when the application crashed:
logging in. Happens everytime. After the crash, the desktop is perfectly usable. Kmix crashes every time, it might be related
- Unusual behavior I noticed:
during the previous boots everything was fine until:
  - I updated the distribution (debian unstable, minor upgrades only, but can not check)
  - the computer hard crashed shortly afterwards, and I had to reboot. It is very uncommon for this system to hard crash. Happened while watching a youtube video

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f5e459637a0 (LWP 3277))]

Thread 2 (Thread 0x7f5e25a6f700 (LWP 3278)):
#0  0x00007f5e452636d3 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f5e3936b9e4 in g_main_context_poll (context=0x17b8a30, block=1, dispatch=1, self=<value optimized out>) at /tmp/buildd/glib2.0-2.28.6/./glib/gmain.c:3404
#2  g_main_context_iterate (context=0x17b8a30, block=1, dispatch=1, self=<value optimized out>) at /tmp/buildd/glib2.0-2.28.6/./glib/gmain.c:3086
#3  0x00007f5e3936bf1d in g_main_context_iteration (context=0x17b8a30, may_block=1) at /tmp/buildd/glib2.0-2.28.6/./glib/gmain.c:3154
#4  0x00007f5e42422126 in QEventDispatcherGlib::processEvents (this=0x16f2e50, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f5e423f67c2 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f5e423f69bf in QEventLoop::exec (this=0x7f5e25a6ecf0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f5e4230e7ef in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#8  0x00007f5e423d97ef in QInotifyFileSystemWatcherEngine::run (this=0x16ee8c0) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f5e42311205 in QThreadPrivate::start (arg=0x16ee8c0) at thread/qthread_unix.cpp:320
#10 0x00007f5e3d407bc3 in ?? () from /usr/lib/libGL.so.1
#11 0x00007f5e3a07ab40 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#12 0x00007f5e4526e2fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f5e459637a0 (LWP 3277)):
[KCrash Handler]
#6  IA__FcPatternDuplicate (orig=0x246a310) at fcpat.c:920
#7  0x00007f5e41a8a6d5 in QFontEngineMultiFT::QFontEngineMultiFT (this=0x246c820, fe=0x246cbf0, matchedPattern=0x246a310, p=0x243a1d0, s=0, req=...) at text/qfontengine_x11.cpp:881
#8  0x00007f5e419e2744 in loadFc (d=0x23f67f0, script=0) at text/qfontdatabase_x11.cpp:1714
#9  QFontDatabase::load (d=0x23f67f0, script=0) at text/qfontdatabase_x11.cpp:1951
#10 0x00007f5e419c0ff5 in QFontPrivate::engineForScript (this=0x23f67f0, script=0) at text/qfont.cpp:270
#11 0x00007f5e419d56ae in QFontMetricsF::leading (this=<value optimized out>) at text/qfontmetrics.cpp:1215
#12 0x00007f5e418fb105 in qt_format_text (fnt=..., _r=<value optimized out>, tf=134234385, option=0x0, str=<value optimized out>, brect=0x7fff93da8eb0, tabstops=0, tabarraylen=0, painter=0x0) at painting/qpainter.cpp:8028
#13 0x00007f5e418fba51 in qt_format_text (fnt=<value optimized out>, _r=<value optimized out>, tf=<value optimized out>, str=<value optimized out>, brect=<value optimized out>, tabstops=<value optimized out>, ta=0x0, tabarraylen=0, painter=0x0) at painting/qpainter.cpp:7876
#14 0x00007f5e419d4eef in QFontMetrics::boundingRect (this=<value optimized out>, rect=<value optimized out>, flags=256, text=..., tabStops=0, tabArray=0x0) at text/qfontmetrics.cpp:798
#15 0x00007f5e285997c1 in Clock::preparePainter (this=0x16a6060, p=0x7fff93da98d0, rect=..., font=<value optimized out>, text=..., singleline=true) at ../../../../../plasma/generic/applets/digital-clock/clock.cpp:602
#16 0x00007f5e28599fa9 in Clock::paintInterface (this=0x16a6060, p=0x7fff93da98d0, contentsRect=..., option=<value optimized out>) at ../../../../../plasma/generic/applets/digital-clock/clock.cpp:510
#17 0x00007f5e44d7f9b6 in Plasma::Applet::paint (this=0x16a6060, painter=0x7fff93da98d0, option=0x1340d58, widget=0x0) at ../../plasma/applet.cpp:1446
#18 0x00007f5e41d908fd in _q_paintItem (item=<value optimized out>, painter=0x7fff93da98d0, option=0x1340d58, widget=0x0, useWindowOpacity=<value optimized out>, painterStateProtection=true) at graphicsview/qgraphicsscene.cpp:4314
#19 0x00007f5e41d914ea in _q_paintIntoCache (pix=0x7fff93da9e60, item=0x16a6070, pixmapExposed=..., itemToPixmap=..., renderHints=..., option=0x1340d58, painterStateProtection=true) at graphicsview/qgraphicsscene.cpp:4352
#20 0x00007f5e41da9808 in QGraphicsScenePrivate::drawItemHelper (this=0x1340b30, item=0x16a6070, painter=0x7fff93dab240, option=0x1340d58, widget=<value optimized out>, painterStateProtection=true) at graphicsview/qgraphicsscene.cpp:4673
#21 0x00007f5e41daa1bd in QGraphicsScenePrivate::draw (this=0x1340b30, item=0x16a6070, painter=0x7fff93dab240, viewTransform=0x7fff93daaf10, transformPtr=0x7fff93daa3f0, exposedRegion=0x2191de0, widget=0x1914e80, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=true) at graphicsview/qgraphicsscene.cpp:4945
#22 0x00007f5e41daaf85 in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x1340b30, item=0x16a6070, painter=0x7fff93dab240, viewTransform=0x7fff93daaf10, exposedRegion=0x2191de0, widget=0x1914e80, parentOpacity=<value optimized out>, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4836
#23 0x00007f5e41daa270 in QGraphicsScenePrivate::draw (this=0x1340b30, item=0x14f33d0, painter=0x7fff93dab240, viewTransform=0x7fff93daaf10, transformPtr=0x7fff93daa9e0, exposedRegion=0x2191de0, widget=0x1914e80, opacity=1, effectTransform=0x0, wasDirtyParentSceneTransform=false, drawItem=true) at graphicsview/qgraphicsscene.cpp:4962
#24 0x00007f5e41daaf85 in QGraphicsScenePrivate::drawSubtreeRecursive (this=0x1340b30, item=0x14f33d0, painter=0x7fff93dab240, viewTransform=0x7fff93daaf10, exposedRegion=0x2191de0, widget=0x1914e80, parentOpacity=<value optimized out>, effectTransform=0x0) at graphicsview/qgraphicsscene.cpp:4836
#25 0x00007f5e41dab7a1 in QGraphicsScenePrivate::drawItems (this=0x1340b30, painter=0x7fff93dab240, viewTransform=0x7fff93daaf10, exposedRegion=0x2191de0, widget=0x1914e80) at graphicsview/qgraphicsscene.cpp:4718
#26 0x00007f5e41dc44e0 in QGraphicsView::paintEvent (this=0x2191860, event=<value optimized out>) at graphicsview/qgraphicsview.cpp:3469
#27 0x00007f5e41801d58 in QWidget::event (this=0x2191860, event=0x7fff93dabbe0) at kernel/qwidget.cpp:8405
#28 0x00007f5e41ba2d76 in QFrame::event (this=0x2191860, e=0x7fff93dabbe0) at widgets/qframe.cpp:557
#29 0x00007f5e41dc583b in QGraphicsView::viewportEvent (this=0x2191860, event=0x7fff93dabbe0) at graphicsview/qgraphicsview.cpp:2864
#30 0x00007f5e423f7748 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x1914e80, event=0x7fff93dabbe0) at kernel/qcoreapplication.cpp:846
#31 0x00007f5e417b174f in notify_helper (this=0x13412e0, receiver=0x1914e80, e=0x7fff93dabbe0) at kernel/qapplication.cpp:4463
#32 QApplicationPrivate::notify_helper (this=0x13412e0, receiver=0x1914e80, e=0x7fff93dabbe0) at kernel/qapplication.cpp:4439
#33 0x00007f5e417b6611 in QApplication::notify (this=0x132bdd0, receiver=0x1914e80, e=0x7fff93dabbe0) at kernel/qapplication.cpp:4346
#34 0x00007f5e430dc4f6 in KApplication::notify (this=0x132bdd0, receiver=0x1914e80, event=0x7fff93dabbe0) at ../../kdeui/kernel/kapplication.cpp:311
#35 0x00007f5e423f75bc in QCoreApplication::notifyInternal (this=0x132bdd0, receiver=0x1914e80, event=0x7fff93dabbe0) at kernel/qcoreapplication.cpp:731
#36 0x00007f5e417fec66 in sendSpontaneousEvent (this=0x21a5cf0, pdev=0x144d9a8, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x21555b0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#37 QWidgetPrivate::drawWidget (this=0x21a5cf0, pdev=0x144d9a8, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x21555b0) at kernel/qwidget.cpp:5492
#38 0x00007f5e417ff840 in QWidgetPrivate::paintSiblingsRecursive (this=0x2191950, pdev=0x144d9a8, siblings=..., index=<value optimized out>, rgn=..., offset=..., flags=4, sharedPainter=0x0, backingStore=0x21555b0) at kernel/qwidget.cpp:5699
#39 0x00007f5e417fe99c in QWidgetPrivate::drawWidget (this=0x2191950, pdev=0x144d9a8, rgn=..., offset=..., flags=<value optimized out>, sharedPainter=0x0, backingStore=0x21555b0) at kernel/qwidget.cpp:5545
#40 0x00007f5e419bbac2 in QWidgetBackingStore::sync (this=0x21555b0) at painting/qbackingstore.cpp:1333
#41 0x00007f5e419bbe26 in QWidgetBackingStore::sync (this=0x21555b0, exposedWidget=0x2191860, exposedRegion=...) at painting/qbackingstore.cpp:1130
#42 0x00007f5e4182cd65 in QETWidget::translatePaintEvent (this=0x2191860, event=<value optimized out>) at kernel/qapplication_x11.cpp:5179
#43 0x00007f5e4182de03 in QApplication::x11ProcessEvent (this=0x132bdd0, event=0x7fff93dacc50) at kernel/qapplication_x11.cpp:3491
#44 0x00007f5e41855ac2 in x11EventSourceDispatch (s=0x133e770, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#45 0x00007f5e3936b4a3 in g_main_dispatch (context=0x133d4e0) at /tmp/buildd/glib2.0-2.28.6/./glib/gmain.c:2440
#46 g_main_context_dispatch (context=0x133d4e0) at /tmp/buildd/glib2.0-2.28.6/./glib/gmain.c:3013
#47 0x00007f5e3936bc80 in g_main_context_iterate (context=0x133d4e0, block=1, dispatch=1, self=<value optimized out>) at /tmp/buildd/glib2.0-2.28.6/./glib/gmain.c:3091
#48 0x00007f5e3936bf1d in g_main_context_iteration (context=0x133d4e0, may_block=1) at /tmp/buildd/glib2.0-2.28.6/./glib/gmain.c:3154
#49 0x00007f5e424220bf in QEventDispatcherGlib::processEvents (this=0x12c7f40, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#50 0x00007f5e4185575e in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#51 0x00007f5e423f67c2 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#52 0x00007f5e423f69bf in QEventLoop::exec (this=0x7fff93dad020, flags=...) at kernel/qeventloop.cpp:201
#53 0x00007f5e423fab67 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#54 0x00007f5e4555d583 in kdemain (argc=1, argv=0x7fff93dad408) at ../../../../plasma/desktop/shell/main.cpp:120
#55 0x00007f5e451b7ead in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fff93dad3f8) at libc-start.c:228
#56 0x00000000004006a1 in _start ()

Reported using DrKonqi