qt crashes somewhere down in QFreetypeFace

During webbrowsing with khtml Konqueror suddenly crashed with this backtrace.

I can't reproduce the bug, so I can't give any more details.

Thread 1 (Thread 0xb7805aa0 (LWP 1648)):
[KCrash Handler]
#6 0x0167db11 in QFreetypeFace::getSfntTable (this=0xb5c32a8, tag=1195656518, buffer=0x0, length=0xbfcfc86c) at text/qfontengine_ft.cpp:409
#7 0x0167b589 in QFontEngineXLFD::getSfntTableData (this=0x9f30fe0, tag=1195656518, buffer=0x0, length=0xbfcfc86c) at text/qfontengine_x11.cpp:775
#8 0x015a7006 in hb_getSFntTable (font=0x9f30fe0, tableTag=1195656518, buffer=0x0, length=0xbfcfc86c) at text/qfontengine.cpp:164
#9 0x0107ce30 in getTableStream (font=0x9f30fe0, tableFunc=<value optimized out>, tag=1195656518) at ../3rdparty/harfbuzz/src/harfbuzz-shaper.cpp:938
#10 0x0107cf32 in HB_NewFace (font=0x9f30fe0, tableFunc=0x15a6fe0 <hb_getSFntTable>) at ../3rdparty/harfbuzz/src/harfbuzz-shaper.cpp:982
#11 0x01082c24 in qHBNewFace (font=0x9f30fe0, tableFunc=0x15a6fe0 <hb_getSFntTable>) at tools/qharfbuzz.cpp:155
#12 0x015a8e22 in QFontEngine::harfbuzzFace (this=0x9f30fe0) at text/qfontengine.cpp:229
#13 0x015dea4d in QTextEngine::shapeTextWithHarfbuzz (this=0xbfcfd4dc, item=0) at text/qtextengine.cpp:1228
#14 0x015df72a in QTextEngine::shapeText (this=0xbfcfd4dc, item=0) at text/qtextengine.cpp:874
#15 0x015dfbea in QTextEngine::shape (this=0xbfcfd4dc, item=0) at text/qtextengine.cpp:1359
#16 0x015e725a in QTextLine::layout_helper (this=0xbfcffdd4, maxGlyphs=2147483647) at text/qtextlayout.cpp:1752
#17 0x015e8384 in QTextLine::setLineWidth (this=0xbfcffdd4, width=16777216) at text/qtextlayout.cpp:1597
#18 0x014ccf6d in qt_format_text (fnt=..., _r=..., tf=540672, option=0x0, str=..., brect=0xbfcfff58, tabstops=0, tabarraylen=0, painter=0x0) at painting/qpainter.cpp:7727
#19 0x014cdda1 in qt_format_text (fnt=..., _r=..., tf=540672, str=..., brect=0xbfcfff58, tabstops=0, ta=0x0, tabarraylen=0, painter=0x0) at painting/qpainter.cpp:7567
#20 0x015b84cb in QFontMetrics::boundingRect (this=0xbfd0023c, rect=..., flags=524288, text=..., tabStops=0, tabArray=0x0) at text/qfontmetrics.cpp:771
#21 0x015b858c in QFontMetrics::size (this=0xbfd0023c, flags=0, text=..., tabStops=0, tabArray=0x0) at text/qfontmetrics.cpp:801
#22 0x0169371b in QCommonStyle::sizeFromContents (this=0x91bf1d8, ct=QStyle::CT_HeaderSection, opt=0xbfd0021c, csz=..., widget=0xd3f70a8) at styles/qcommonstyle.cpp:4820
#23 0x017497c3 in QWindowsStyle::sizeFromContents (this=0x91bf1d8, ct=199043592, opt=0xbfd0021c, csz=..., widget=0xd3f70a8) at styles/qwindowsstyle.cpp:3240
#24 0x016e964b in QPlastiqueStyle::sizeFromContents (this=0x91bf1d8, type=QStyle::CT_HeaderSection, option=0xbfd0021c, size=..., widget=0xd3f70a8) at styles/qplastiquestyle.cpp:4972
#25 0x019097c2 in QHeaderView::sectionSizeFromContents (this=0xd3f70a8, logicalIndex=0) at itemviews/qheaderview.cpp:2563
#26 0x01907af2 in QHeaderView::sizeHint (this=0xd3f70a8) at itemviews/qheaderview.cpp:536
#27 0x0192a8b4 in QTableView::updateGeometries (this=0xc054bb0) at itemviews/qtableview.cpp:1999
#28 0x018fe6f8 in QAbstractItemView::qt_metacall (this=0xc054bb0, _c=QMetaObject::InvokeMetaMethod, _id=23, _a=0xbfd005ac) at .moc/release-shared/moc_qabstractitemview.cpp:241
#29 0x01936d0a in QTableView::qt_metacall (this=0xc054bb0, _c=QMetaObject::InvokeMetaMethod, _id=54, _a=0xbfd005ac) at .moc/release-shared/moc_qtableview.cpp:118
#30 0x0197690a in QTableWidget::qt_metacall (this=0xc054bb0, _c=QMetaObject::InvokeMetaMethod, _id=54, _a=0xbfd005ac) at .moc/release-shared/moc_qtablewidget.cpp:135
#31 0x01114c9a in QMetaObject::metacall (object=0xc054bb0, cl=199043592, idx=54, argv=0xbfd005ac) at kernel/qmetaobject.cpp:237
#32 0x011233d5 in QMetaObject::activate (sender=0xd3f70a8, m=0x1c8f37c, local_signal_index=9, argv=0x0) at kernel/qobject.cpp:3293
#33 0x01905af7 in QHeaderView::geometriesChanged (this=0xd3f70a8) at .moc/release-shared/moc_qheaderview.cpp:274
#34 0x0190da3c in QHeaderView::viewportEvent (this=0xd3f70a8, e=0xbfd00adc) at itemviews/qheaderview.cpp:2406
#35 0x01851c65 in QAbstractScrollAreaPrivate::viewportEvent (this=0xa857f30, o=0xb6ef300, e=0xbfd00adc) at widgets/qabstractscrollarea_p.h:100
#36 QAbstractScrollAreaFilter::eventFilter (this=0xa857f30, o=0xb6ef300, e=0xbfd00adc) at widgets/qabstractscrollarea_p.h:116
#37 0x0110ecda in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x9135ba8, receiver=0xb6ef300, event=0xbfd00adc) at kernel/qcoreapplication.cpp:819
#38 0x0135a4b9 in QApplicationPrivate::notify_helper (this=0x9135ba8, receiver=0xb6ef300, e=0xbfd00adc) at kernel/qapplication.cpp:4296
#39 0x013610f9 in QApplication::notify (this=0xbfd02f44, receiver=0xb6ef300, e=0xbfd00adc) at kernel/qapplication.cpp:4265
#40 0x00bb6f2a in KApplication::notify (this=0xbfd02f44, receiver=0xb6ef300, event=0xbfd00adc) at ../../kdeui/kernel/kapplication.cpp:302
#41 0x0110fa3b in QCoreApplication::notifyInternal (this=0xbfd02f44, receiver=0xb6ef300, event=0xbfd00adc) at kernel/qcoreapplication.cpp:704
#42 0x013b209a in QCoreApplication::sendEvent (this=0x11d05210, font=...) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#43 QWidgetPrivate::updateFont (this=0x11d05210, font=...) at kernel/qwidget.cpp:4660
#44 0x013b1e6e in QWidgetPrivate::setFont_helper (this=0x11d05210) at ../../include/QtGui/private/../../../src/gui/kernel/qwidget_p.h:367
#45 QWidgetPrivate::resolveFont (this=0x11d05210) at kernel/qwidget.cpp:4594
#46 0x013b2029 in QWidgetPrivate::updateFont (this=0x12ed3578, font=...) at kernel/qwidget.cpp:4648
#47 0x013b1e6e in QWidgetPrivate::setFont_helper (this=0x12ed3578) at ../../include/QtGui/private/../../../src/gui/kernel/qwidget_p.h:367
#48 QWidgetPrivate::resolveFont (this=0x12ed3578) at kernel/qwidget.cpp:4594
#49 0x013b2029 in QWidgetPrivate::updateFont (this=0xab335e8, font=...) at kernel/qwidget.cpp:4648
#50 0x013b95d7 in QWidgetPrivate::setFont_helper (this=0xc054bb0, font=...) at ../../include/QtGui/private/../../../src/gui/kernel/qwidget_p.h:367
#51 QWidget::setFont (this=0xc054bb0, font=...) at kernel/qwidget.cpp:4534
#52 0x00d0cec8 in KCupsOptionsJobWidget (this=0xa67d650, parent=0xac220d0) at ../../kdeui/dialogs/kcupsoptionsjobwidget_p.cpp:43
#53 0x00b15465 in KdePrint::createPrintDialog (printer=0xbfd00fb4, pageSelectPolicy=KdePrint::SystemSelectsPages, customTabs=..., parent=0xad7e0990) at ../../kdeui/dialogs/kdeprintdialog.cpp:56
#54 0x0729eaad in KHTMLView::print (this=0xad7e0990, quick=false) at ../../khtml/khtmlview.cpp:3177
#55 0x075321ba in KJS::WindowFunc::callAsFunction (this=0xb3a8faa0, exec=0xbfd01670, thisObj=0xb3a90040, args=...) at ../../khtml/ecma/kjs_window.cpp:2099
#56 0x029d110d in KJS::JSObject::call (this=0xbdd2a08, exec=0xbfd01670, thisObj=0xb3a90040, args=...) at ../../kjs/object.cpp:70
#57 0x029ef3a2 in KJS::Machine::runBlock (exec=0xbfd01670, codeBlock=..., parentExec=0xad9da2a8) at codes.def:1192
#58 0x029cd4cb in KJS::FunctionImp::callAsFunction (this=0xb3a8fb40, exec=0xad9da2a8, thisObj=0xb3a90040, args=...) at ../../kjs/function.cpp:144
#59 0x029d110d in KJS::JSObject::call (this=0xbdd2a08, exec=0xad9da2a8, thisObj=0xb3a90040, args=...) at ../../kjs/object.cpp:70
#60 0x07557167 in KJS::JSEventListener::handleEvent (this=0x9950a58, evt=...) at ../../khtml/ecma/kjs_events.cpp:106
#61 0x07324b59 in DOM::DocumentImpl::defaultEventHandler (this=0x9e7f7c8, evt=0xd3f4398) at ../../khtml/xml/dom_docimpl.cpp:2749
#62 0x0733c987 in DOM::NodeImpl::dispatchWindowEvent (this=0x9e7f7d4, _id=16, canBubbleArg=<value optimized out>, cancelableArg=<value optimized out>) at ../../khtml/xml/dom_nodeimpl.cpp:568
#63 0x07398025 in DOM::HTMLDocumentImpl::close (this=0x9e7f7c8) at ../../khtml/html/html_documentimpl.cpp:249
#64 0x072b5e76 in KHTMLPart::checkEmitLoadEvent (this=0xb375e2d8) at ../../khtml/khtml_part.cpp:2500
#65 0x072beace in KHTMLPart::slotFinishedParsing (this=0xb375e2d8) at ../../khtml/khtml_part.cpp:2219
#66 0x072e7333 in KHTMLPart::qt_metacall (this=0xb375e2d8, _c=QMetaObject::InvokeMetaMethod, _id=22, _a=0xbfd01a4c) at ./khtml_part.moc:280
#67 0x01114c9a in QMetaObject::metacall (object=0xb375e2d8, cl=199043592, idx=36, argv=0xbfd01a4c) at kernel/qmetaobject.cpp:237
#68 0x011233d5 in QMetaObject::activate (sender=0x9e7f7c8, m=0x77cf4c8, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3293
#69 0x07320627 in DOM::DocumentImpl::finishedParsing (this=0x9e7f7c8) at ./dom_docimpl.moc:85
#70 0x07320681 in DOM::DocumentImpl::qt_metacall (this=0x9e7f7c8, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbfd01b8c) at ./dom_docimpl.moc:74
#71 0x07397a97 in DOM::HTMLDocumentImpl::qt_metacall (this=0x9e7f7c8, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbfd01b8c) at ./html_documentimpl.moc:69
#72 0x01114c9a in QMetaObject::metacall (object=0x9e7f7c8, cl=199043592, idx=4, argv=0xbfd01b8c) at kernel/qmetaobject.cpp:237
#73 0x011233d5 in QMetaObject::activate (sender=0xa1fe408, m=0x77d0fe8, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3293
#74 0x07359037 in khtml::Tokenizer::finishedParsing (this=0xa1fe408) at ./xml_tokenizer.moc:83
#75 0x0737bdd9 in khtml::HTMLTokenizer::end (this=0xa1fe408) at ../../khtml/html/htmltokenizer.cpp:1946
#76 0x07382b19 in khtml::HTMLTokenizer::finish (this=0xa1fe408) at ../../khtml/html/htmltokenizer.cpp:1995
#77 0x07320218 in DOM::DocumentImpl::finishParsing (this=0x9e7f7c8) at ../../khtml/xml/dom_docimpl.cpp:1692
#78 0x072b9d5d in KHTMLPart::end (this=0xb375e2d8) at ../../khtml/khtml_part.cpp:2138
#79 0x072c35de in KHTMLPart::slotFinished (this=0xb375e2d8, job=0xaf3774f0) at ../../khtml/khtml_part.cpp:1982
#80 0x072e7398 in KHTMLPart::qt_metacall (this=0xb375e2d8, _c=QMetaObject::InvokeMetaMethod, _id=17, _a=0xbfd01ec8) at ./khtml_part.moc:275
#81 0x01114c9a in QMetaObject::metacall (object=0xb375e2d8, cl=199043592, idx=31, argv=0xbfd01ec8) at kernel/qmetaobject.cpp:237
#82 0x011233d5 in QMetaObject::activate (sender=0xaf3774f0, m=0x9cec88, local_signal_index=3, argv=0xbfd01ec8) at kernel/qobject.cpp:3293
#83 0x00860183 in KJob::result (this=0xaf3774f0, _t1=0xaf3774f0) at ./kjob.moc:194
#84 0x008604e8 in KJob::emitResult (this=0xaf3774f0) at ../../kdecore/jobs/kjob.cpp:312
#85 0x00561f30 in KIO::SimpleJob::slotFinished (this=0xaf3774f0) at ../../kio/kio/job.cpp:486
#86 0x0056296d in KIO::TransferJob::slotFinished (this=0xaf3774f0) at ../../kio/kio/job.cpp:1058
#87 0x00560343 in KIO::TransferJob::qt_metacall (this=0xaf3774f0, _c=QMetaObject::InvokeMetaMethod, _id=47, _a=0xbfd0215c) at ./jobclasses.moc:367
#88 0x01114c9a in QMetaObject::metacall (object=0xaf3774f0, cl=199043592, idx=47, argv=0xbfd0215c) at kernel/qmetaobject.cpp:237
#89 0x011233d5 in QMetaObject::activate (sender=0xb55b2530, m=0x710f44, local_signal_index=4, argv=0x0) at kernel/qobject.cpp:3293
#90 0x0062c707 in KIO::SlaveInterface::finished (this=0xb55b2530) at ./slaveinterface.moc:171
#91 0x0062fa2d in KIO::SlaveInterface::dispatch (this=0xb55b2530, _cmd=104, rawdata=...) at ../../kio/kio/slaveinterface.cpp:175
#92 0x0062cbc3 in KIO::SlaveInterface::dispatch (this=0xb55b2530) at ../../kio/kio/slaveinterface.cpp:91
#93 0x00620088 in KIO::Slave::gotInput (this=0xb55b2530) at ../../kio/kio/slave.cpp:324
#94 0x00620293 in KIO::Slave::qt_metacall (this=0xb55b2530, _c=QMetaObject::InvokeMetaMethod, _id=30, _a=0xbfd0246c) at ./slave.moc:82
#95 0x01114c9a in QMetaObject::metacall (object=0xb55b2530, cl=199043592, idx=30, argv=0xbfd0246c) at kernel/qmetaobject.cpp:237
#96 0x011233d5 in QMetaObject::activate (sender=0xadb80368, m=0x70d820, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3293
#97 0x0052abd7 in KIO::Connection::readyRead (this=0xadb80368) at ./connection.moc:92
#98 0x0052cf8e in KIO::ConnectionPrivate::dequeue (this=0xae16c080) at ../../kio/kio/connection.cpp:82
#99 0x0052d0be in KIO::Connection::qt_metacall (this=0xadb80368, _c=QMetaObject::InvokeMetaMethod, _id=5, _a=0xaea7068) at ./connection.moc:79
#100 0x01114c9a in QMetaObject::metacall (object=0xadb80368, cl=199043592, idx=5, argv=0xaea7068) at kernel/qmetaobject.cpp:237
#101 0x0111f336 in QMetaCallEvent::placeMetaCall (this=0xa52cd58, object=0xadb80368) at kernel/qobject.cpp:561
#102 0x011203fe in QObject::event (this=0xadb80368, e=0xa52cd58) at kernel/qobject.cpp:1248
#103 0x0135a4dc in QApplicationPrivate::notify_helper (this=0x9135ba8, receiver=0xadb80368, e=0xa52cd58) at kernel/qapplication.cpp:4300
#104 0x0136105e in QApplication::notify (this=0xbfd02f44, receiver=0xadb80368, e=0xa52cd58) at kernel/qapplication.cpp:3704
#105 0x00bb6f2a in KApplication::notify (this=0xbfd02f44, receiver=0xadb80368, event=0xa52cd58) at ../../kdeui/kernel/kapplication.cpp:302
#106 0x0110fa3b in QCoreApplication::notifyInternal (this=0xbfd02f44, receiver=0xadb80368, event=0xa52cd58) at kernel/qcoreapplication.cpp:704
#107 0x01112473 in QCoreApplication::sendEvent (receiver=0x0, event_type=0, data=0x90e7fc8) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#108 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x90e7fc8) at kernel/qcoreapplication.cpp:1345
#109 0x011125dd in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1238
#110 0x0113badf in QCoreApplication::sendPostedEvents (s=0x9137d78) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#111 postEventSourceDispatch (s=0x9137d78) at kernel/qeventdispatcher_glib.cpp:276
#112 0x01cdc5e5 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#113 0x01ce02d8 in ?? () from /lib/libglib-2.0.so.0
#114 0x01ce04b8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#115 0x0113b5d5 in QEventDispatcherGlib::processEvents (this=0x90e8b48, flags=...) at kernel/qeventdispatcher_glib.cpp:412
#116 0x0141a135 in QGuiEventDispatcherGlib::processEvents (this=0x90e8b48, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#117 0x0110e059 in QEventLoop::processEvents (this=0xbfd02d24, flags=) at kernel/qeventloop.cpp:149
#118 0x0110e4aa in QEventLoop::exec (this=0xbfd02d24, flags=...) at kernel/qeventloop.cpp:201
#119 0x0111269f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#120 0x0135a577 in QApplication::exec () at kernel/qapplication.cpp:3579
#121 0x027e51ee in kdemain () from /usr/lib/libkdeinit4_konqueror.so
#122 0x0804e133 in launch (argc=<value optimized out>, _name=<value optimized out>, args=<value optimized out>, cwd=0x0, envc=0, envs=0x911e8f4 "", reset_env=false, tty=0x0, avoid_loops=false,
startup_id_str=0x8051465 "0") at ../../kinit/kinit.cpp:717
#123 0x0804ec6d in handle_launcher_request (sock=<value optimized out>, who=<value optimized out>) at ../../kinit/kinit.cpp:1209
#124 0x0804f190 in handle_requests (waitForPid=<value optimized out>) at ../../kinit/kinit.cpp:1402
#125 0x0804fe4f in main (argc=4, argv=0xbfd03b24, envp=0xbfd03b38) at ../../kinit/kinit.cpp:1845