Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.4 (4.7.4)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-15-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
first I tried to rearrange the apps in the task manager (open apps)
the plasma stuff became unresponsive at this point though I didn't realize it at the time.
I found out that it stuck when I tried to get at the task manager settings to make sure I could drag around the app buttons, right after plasma unstuck, it crashed

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fb706ed27a0 (LWP 3267))]

Thread 3 (Thread 0x7fb6ea061700 (LWP 3271)):
#0  0x00007fb7067c2773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fb6fab06f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb6fab07792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb6f154b516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fb6fab2c2b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb6fb613efc in start_thread (arg=0x7fb6ea061700) at pthread_create.c:304
#6  0x00007fb7067ce89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fb6d84c3700 (LWP 3275)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007fb6d84c2ad0 in ?? ()
#2  0x00007ffff47ff7e7 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 1 (Thread 0x7fb706ed27a0 (LWP 3267)):
[KCrash Handler]
#6  deref (this=0x2033c2310) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86_64.h:133
#7  ~QVector (this=0x2f12528, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qvector.h:119
#8  QTextTablePrivate::~QTextTablePrivate (this=0x2f12460, __in_chrg=<optimized out>) at text/qtexttable.cpp:321
#9  0x00007fb702fe21c9 in QTextTablePrivate::~QTextTablePrivate (this=0x2f12460, __in_chrg=<optimized out>) at text/qtexttable.cpp:325
#10 0x00007fb70399b39b in cleanup (pointer=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:62
#11 ~QScopedPointer (this=0x2b7cd88, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:100
#12 QObject::~QObject (this=0x2b7cd80, __in_chrg=<optimized out>) at kernel/qobject.cpp:818
#13 0x00007fb702fe2059 in QTextTable::~QTextTable (this=0x2b7cd80, __in_chrg=<optimized out>) at text/qtexttable.cpp:578
#14 0x00007fb702faf4cb in QTextDocumentPrivate::clear (this=0x33f8080) at text/qtextdocument_p.cpp:253
#15 0x00007fb702fa2444 in QTextDocument::setHtml (this=0x33ab2c0, html=...) at text/qtextdocument.cpp:1199
#16 0x00007fb70312fea5 in QLabelPrivate::ensureTextPopulated (this=0x17f60f0) at widgets/qlabel.cpp:1540
#17 0x00007fb70312ffd5 in QLabelPrivate::ensureTextLayouted (this=0x17f60f0) at widgets/qlabel.cpp:1574
#18 0x00007fb7031303c8 in QLabelPrivate::sizeForWidth (this=0x17f60f0, w=-1) at widgets/qlabel.cpp:652
#19 0x00007fb7031309e5 in QLabel::minimumSizeHint (this=0x1707120) at widgets/qlabel.cpp:899
#20 0x00007fb703315cad in QGraphicsProxyWidget::sizeHint (this=<optimized out>, which=<optimized out>, constraint=<optimized out>) at graphicsview/qgraphicsproxywidget.cpp:1439
#21 0x00007fb7063b6b3a in Plasma::Label::sizeHint (this=0x17e8e90, which=Qt::MinimumSize, constraint=...) at ../../plasma/widgets/label.cpp:344
#22 0x00007fb703313d6f in QGraphicsLayoutItemPrivate::effectiveSizeHints (this=0x17f6000, constraint=...) at graphicsview/qgraphicslayoutitem.cpp:175
#23 0x00007fb703314551 in effectiveSizeHint (constraint=<optimized out>, which=<optimized out>, this=<optimized out>) at graphicsview/qgraphicslayoutitem.cpp:818
#24 QGraphicsLayoutItem::effectiveSizeHint (this=<optimized out>, which=<optimized out>, constraint=<optimized out>) at graphicsview/qgraphicslayoutitem.cpp:810
#25 0x00007fb70335a88b in sizeHint (constraint=..., which=Qt::PreferredSize, this=0x17f4980) at graphicsview/qgridlayoutengine.cpp:595
#26 QGridLayoutItem::box (this=0x17f4980, orientation=<optimized out>, constraint=<optimized out>) at graphicsview/qgridlayoutengine.cpp:606
#27 0x00007fb70335e1b7 in QGridLayoutEngine::fillRowData (this=0x17e0430, rowData=0x17e0528, styleInfo=..., colPositions=0x0, colSizes=0x0, orientation=Qt::Horizontal) at graphicsview/qgridlayoutengine.cpp:1497
#28 0x00007fb70335ed73 in QGridLayoutEngine::ensureColumnAndRowData (this=0x17e0430, rowData=0x17e0528, totalBox=0x7ffff4658e90, styleInfo=..., colPositions=<optimized out>, colSizes=<optimized out>, orientation=Qt::Horizontal) at graphicsview/qgridlayoutengine.cpp:1641
#29 0x00007fb70335fbd5 in QGridLayoutEngine::sizeHint (this=0x17e0430, styleInfo=..., which=Qt::MaximumSize, constraint=...) at graphicsview/qgridlayoutengine.cpp:1178
#30 0x00007fb7032e90da in QGraphicsGridLayout::sizeHint (this=<optimized out>, which=Qt::MaximumSize, constraint=...) at graphicsview/qgraphicsgridlayout.cpp:656
#31 0x00007fb703313c99 in QGraphicsLayoutItemPrivate::effectiveSizeHints (this=0x17e0320, constraint=...) at graphicsview/qgraphicslayoutitem.cpp:169
#32 0x00007fb703314551 in effectiveSizeHint (constraint=<optimized out>, which=<optimized out>, this=<optimized out>) at graphicsview/qgraphicslayoutitem.cpp:818
#33 QGraphicsLayoutItem::effectiveSizeHint (this=<optimized out>, which=<optimized out>, constraint=<optimized out>) at graphicsview/qgraphicslayoutitem.cpp:810
#34 0x00007fb7033145f2 in QGraphicsLayoutItem::setGeometry (this=<optimized out>, rect=...) at graphicsview/qgraphicslayoutitem.cpp:726
#35 0x00007fb7032e9187 in QGraphicsGridLayout::setGeometry (this=0x1886320, rect=<optimized out>) at graphicsview/qgraphicsgridlayout.cpp:627
#36 0x00007fb7033131e3 in QGraphicsLayout::activate (this=0x1886320) at graphicsview/qgraphicslayout.cpp:272
#37 0x00007fb703313259 in QGraphicsLayout::widgetEvent (this=0x1886320, e=<optimized out>) at graphicsview/qgraphicslayout.cpp:389
#38 0x00007fb70335191a in QGraphicsWidget::event (this=0x17dfeb0, event=0x13976d0) at graphicsview/qgraphicswidget.cpp:1379
#39 0x00007fb702d33474 in notify_helper (e=0x13976d0, receiver=0x17dfeb0, this=0xb937a0) at kernel/qapplication.cpp:4486
#40 QApplicationPrivate::notify_helper (this=0xb937a0, receiver=0x17dfeb0, e=0x13976d0) at kernel/qapplication.cpp:4458
#41 0x00007fb702d382e1 in QApplication::notify (this=0xb89300, receiver=0x17dfeb0, e=0x13976d0) at kernel/qapplication.cpp:4365
#42 0x00007fb704632466 in KApplication::notify (this=0xb89300, receiver=0x17dfeb0, event=0x13976d0) at ../../kdeui/kernel/kapplication.cpp:311
#43 0x00007fb703983afc in QCoreApplication::notifyInternal (this=0xb89300, receiver=0x17dfeb0, event=0x13976d0) at kernel/qcoreapplication.cpp:787
#44 0x00007fb70398751f in sendEvent (event=0x13976d0, receiver=0x17dfeb0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#45 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0xb16430) at kernel/qcoreapplication.cpp:1428
#46 0x00007fb7039aea73 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#47 postEventSourceDispatch (s=<optimized out>) at kernel/qeventdispatcher_glib.cpp:277
#48 0x00007fb6fab06a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#49 0x00007fb6fab07258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#50 0x00007fb6fab07429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#51 0x00007fb7039aeed6 in QEventDispatcherGlib::processEvents (this=0xb17f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#52 0x00007fb702ddb10e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#53 0x00007fb703982cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#54 0x00007fb703982ef7 in QEventLoop::exec (this=0x7ffff4659960, flags=...) at kernel/qeventloop.cpp:201
#55 0x00007fb703987789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#56 0x00007fb706acd1a3 in kdemain (argc=1, argv=0x7ffff4659d48) at ../../../../plasma/desktop/shell/main.cpp:120
#57 0x00007fb70670e30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7ffff4659d48, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffff4659d38) at libc-start.c:226
#58 0x0000000000400671 in _start ()

Reported using DrKonqi