Bug 301992

Application: plasma-desktop (0.4)
KDE Platform Version: 4.8.3 (4.8.3)
Qt Version: 4.8.2
Operating System: Linux 3.4.0-1.fc17.x86_64 x86_64
Distribution (Platform): Fedora RPMs

-- Information about the crash:
- What I was doing when the application crashed:
I was trying to position and resize a the Fading Calendar widget on the side of the screen.
The Layout was 'Grid Desktop'. I was trying to position/resize the widget from both the transparent black squares in the corners of the widget and the 'vertical tool bar' (? - don't know a better name) that pops up. I believe Plasma crashed moments after I used the vertical tool bar to position the widget and then it repositioned itself automatically according to the grid of the Grid Desktop layout.


- Unusual behaviour I noticed:
I noticed that if I had a dual monitor setup and that my primary monitor's (my laptop screen) desktop layout had a 'Grid Desktop' layout, then no grid appeared and neither did the transparent squares in the corners of the widgets when trying positioning/resize widgets on that desktop. I did not check the layout for the desktop of the other monitor. Note that I had turned my dual monitor setting off prior to the crash, in an attempt to position my widgets correctly. However this might be a separate issue altogether and might need to be filed in a separate bug report.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
82	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[Current thread is 1 (Thread 0x7f730b928880 (LWP 1279))]

Thread 5 (Thread 0x7f72f4ccb700 (LWP 1280)):
#0  0x0000003880a0aa7f in __pthread_mutex_unlock_usercnt (mutex=0x7f72f0000a60, decr=decr@entry=1) at pthread_mutex_unlock.c:53
#1  0x0000003880a0aada in __pthread_mutex_unlock (mutex=<optimized out>) at pthread_mutex_unlock.c:298
#2  0x000000387fa83721 in g_mutex_unlock (mutex=mutex@entry=0x7f72f00009a0) at gthread-posix.c:227
#3  0x000000387fa471e5 in g_main_context_prepare (context=context@entry=0x7f72f00009a0, priority=priority@entry=0x7f72f4ccab98) at gmain.c:2834
#4  0x000000387fa478db in g_main_context_iterate (context=context@entry=0x7f72f00009a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at gmain.c:3126
#5  0x000000387fa47ad4 in g_main_context_iteration (context=0x7f72f00009a0, may_block=1) at gmain.c:3207
#6  0x0000003886ba4506 in QEventDispatcherGlib::processEvents (this=0x7f72f00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#7  0x0000003886b7513f in QEventLoop::processEvents (this=this@entry=0x7f72f4ccacf0, flags=...) at kernel/qeventloop.cpp:149
#8  0x0000003886b753c8 in QEventLoop::exec (this=0x7f72f4ccacf0, flags=...) at kernel/qeventloop.cpp:204
#9  0x0000003886a78650 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#10 0x0000003886b55b4f in QInotifyFileSystemWatcherEngine::run (this=0x256f550) at io/qfilesystemwatcher_inotify.cpp:248
#11 0x0000003886a7b5eb in QThreadPrivate::start (arg=0x256f550) at thread/qthread_unix.cpp:307
#12 0x0000003880a07d14 in start_thread (arg=0x7f72f4ccb700) at pthread_create.c:309
#13 0x000000387fef199d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 4 (Thread 0x7f72ed001700 (LWP 1283)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:166
#1  0x0000003895784ac7 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x3895a919a0) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x0000003895784af9 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x0000003880a07d14 in start_thread (arg=0x7f72ed001700) at pthread_create.c:309
#4  0x000000387fef199d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 3 (Thread 0x7f72baf57700 (LWP 3631)):
#0  0x000000387fee8eef in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x000000387fa479b4 in g_main_context_poll (n_fds=1, fds=0x7f72b4002bb0, timeout=-1, context=0x7f72b40009a0, priority=<optimized out>) at gmain.c:3440
#2  g_main_context_iterate (context=context@entry=0x7f72b40009a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at gmain.c:3141
#3  0x000000387fa47ad4 in g_main_context_iteration (context=0x7f72b40009a0, may_block=1) at gmain.c:3207
#4  0x0000003886ba4506 in QEventDispatcherGlib::processEvents (this=0x7f72b40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x0000003886b7513f in QEventLoop::processEvents (this=this@entry=0x7f72baf56cf0, flags=...) at kernel/qeventloop.cpp:149
#6  0x0000003886b753c8 in QEventLoop::exec (this=0x7f72baf56cf0, flags=...) at kernel/qeventloop.cpp:204
#7  0x0000003886a78650 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#8  0x0000003886b55b4f in QInotifyFileSystemWatcherEngine::run (this=0x60438d0) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x0000003886a7b5eb in QThreadPrivate::start (arg=0x60438d0) at thread/qthread_unix.cpp:307
#10 0x0000003880a07d14 in start_thread (arg=0x7f72baf57700) at pthread_create.c:309
#11 0x000000387fef199d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 2 (Thread 0x7f72b33a9700 (LWP 3644)):
#0  __pthread_mutex_lock (mutex=0x7f72ac000a60) at pthread_mutex_lock.c:48
#1  0x000000387fa836f1 in g_mutex_lock (mutex=mutex@entry=0x7f72ac0009a0) at gthread-posix.c:208
#2  0x000000387fa472cb in g_main_context_query (context=context@entry=0x7f72ac0009a0, max_priority=2147483647, timeout=timeout@entry=0x7f72b33a8bcc, fds=fds@entry=0x7f72ac0027c0, n_fds=n_fds@entry=1) at gmain.c:2905
#3  0x000000387fa47929 in g_main_context_iterate (context=context@entry=0x7f72ac0009a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at gmain.c:3128
#4  0x000000387fa47ad4 in g_main_context_iteration (context=0x7f72ac0009a0, may_block=1) at gmain.c:3207
#5  0x0000003886ba4506 in QEventDispatcherGlib::processEvents (this=0x7f72ac0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x0000003886b7513f in QEventLoop::processEvents (this=this@entry=0x7f72b33a8d20, flags=...) at kernel/qeventloop.cpp:149
#7  0x0000003886b753c8 in QEventLoop::exec (this=0x7f72b33a8d20, flags=...) at kernel/qeventloop.cpp:204
#8  0x0000003886a78650 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x0000003886a7b5eb in QThreadPrivate::start (arg=0x8f5bd70) at thread/qthread_unix.cpp:307
#10 0x0000003880a07d14 in start_thread (arg=0x7f72b33a9700) at pthread_create.c:309
#11 0x000000387fef199d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 1 (Thread 0x7f730b928880 (LWP 1279)):
[KCrash Handler]
#6  0x0000003888391bdb in QGraphicsItem::setParentItem (this=0x9bdd090, newParent=0x5c33230) at graphicsview/qgraphicsitem.cpp:1714
#7  0x00007f72dc8736b6 in GroupingContainmentPrivate::onWidgetMoved (this=0x9d0da60, widget=0x5c33230) at /usr/src/debug/kdeplasma-addons-4.8.3/containments/groupingdesktop/lib/groupingcontainment.cpp:428
#8  0x00007f72dc8739f7 in GroupingContainment::setMovingWidget (this=0x5c33220, widget=0x9b65840) at /usr/src/debug/kdeplasma-addons-4.8.3/containments/groupingdesktop/lib/groupingcontainment.cpp:977
#9  0x00007f72dc877d28 in FreeHandle::mousePressEvent (this=0x5681870, event=0x7fffff3499c0) at /usr/src/debug/kdeplasma-addons-4.8.3/containments/groupingdesktop/lib/freehandle.cpp:482
#10 0x0000003888385ec7 in QGraphicsItem::sceneEvent (this=0x5681880, event=0x7fffff3499c0) at graphicsview/qgraphicsitem.cpp:6738
#11 0x00007f72dc87b421 in FreeHandle::sceneEvent (this=0x5681870, event=<optimized out>) at /usr/src/debug/kdeplasma-addons-4.8.3/containments/groupingdesktop/lib/freehandle.cpp:823
#12 0x00000038883afe30 in sendMouseEvent (mouseEvent=0x7fffff3499c0, this=0x1e35090) at graphicsview/qgraphicsscene.cpp:1295
#13 QGraphicsScenePrivate::sendMouseEvent (this=0x1e35090, mouseEvent=0x7fffff3499c0) at graphicsview/qgraphicsscene.cpp:1274
#14 0x00000038883b5666 in QGraphicsScenePrivate::mousePressEventHandler (this=this@entry=0x1e35090, mouseEvent=mouseEvent@entry=0x7fffff3499c0) at graphicsview/qgraphicsscene.cpp:1422
#15 0x00000038883b5b6f in QGraphicsScene::mousePressEvent (this=<optimized out>, mouseEvent=0x7fffff3499c0) at graphicsview/qgraphicsscene.cpp:4074
#16 0x00000038883c2c3a in QGraphicsScene::event (this=0x1cd4d30, event=0x7fffff3499c0) at graphicsview/qgraphicsscene.cpp:3455
#17 0x0000003887dca37c in QApplicationPrivate::notify_helper (this=this@entry=0x1cd4ee0, receiver=receiver@entry=0x1cd4d30, e=e@entry=0x7fffff3499c0) at kernel/qapplication.cpp:4551
#18 0x0000003887dce7fa in QApplication::notify (this=0x1cbb470, receiver=0x1cd4d30, e=0x7fffff3499c0) at kernel/qapplication.cpp:4412
#19 0x000000388f245a56 in KApplication::notify (this=0x1cbb470, receiver=0x1cd4d30, event=0x7fffff3499c0) at /usr/src/debug/kdelibs-4.8.3/kdeui/kernel/kapplication.cpp:311
#20 0x0000003886b763ee in QCoreApplication::notifyInternal (this=0x1cbb470, receiver=0x1cd4d30, event=0x7fffff3499c0) at kernel/qcoreapplication.cpp:915
#21 0x00000038883d3a81 in QGraphicsView::mousePressEvent (this=0x2b13b70, event=0x7fffff34a2f0) at graphicsview/qgraphicsview.cpp:3164
#22 0x0000003887e19ff3 in QWidget::event (this=0x2b13b70, event=0x7fffff34a2f0) at kernel/qwidget.cpp:8367
#23 0x00000038881c3b46 in QFrame::event (this=0x2b13b70, e=0x7fffff34a2f0) at widgets/qframe.cpp:557
#24 0x00000038883dc1eb in QGraphicsView::viewportEvent (this=0x2b13b70, event=0x7fffff34a2f0) at graphicsview/qgraphicsview.cpp:2866
#25 0x0000003886b76556 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<optimized out>, receiver=0x46cb740, event=0x7fffff34a2f0) at kernel/qcoreapplication.cpp:1025
#26 0x0000003887dca34c in QApplicationPrivate::notify_helper (this=this@entry=0x1cd4ee0, receiver=receiver@entry=0x46cb740, e=e@entry=0x7fffff34a2f0) at kernel/qapplication.cpp:4547
#27 0x0000003887dcf05b in QApplication::notify (this=<optimized out>, receiver=0x46cb740, e=0x7fffff34a2f0) at kernel/qapplication.cpp:4094
#28 0x000000388f245a56 in KApplication::notify (this=0x1cbb470, receiver=0x46cb740, event=0x7fffff34a2f0) at /usr/src/debug/kdelibs-4.8.3/kdeui/kernel/kapplication.cpp:311
#29 0x0000003886b763ee in QCoreApplication::notifyInternal (this=0x1cbb470, receiver=0x46cb740, event=0x7fffff34a2f0) at kernel/qcoreapplication.cpp:915
#30 0x0000003887dcb1bb in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../src/corelib/kernel/qcoreapplication.h:231
#31 QApplicationPrivate::sendMouseEvent (receiver=0x46cb740, event=0x7fffff34a2f0, alienWidget=0x46cb740, nativeWidget=0x2b13b70, buttonDown=0x388889dd68, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3162
#32 0x0000003887e45894 in QETWidget::translateMouseEvent (this=this@entry=0x2b13b70, event=event@entry=0x7fffff34aa60) at kernel/qapplication_x11.cpp:4523
#33 0x0000003887e44621 in QApplication::x11ProcessEvent (this=0x1cbb470, event=0x7fffff34aa60) at kernel/qapplication_x11.cpp:3646
#34 0x0000003887e6a60c in x11EventSourceDispatch (s=s@entry=0x1cd7100, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:148
#35 0x000000387fa476e5 in g_main_dispatch (context=0x1cd6c40) at gmain.c:2539
#36 g_main_context_dispatch (context=context@entry=0x1cd6c40) at gmain.c:3075
#37 0x000000387fa47a18 in g_main_context_iterate (context=context@entry=0x1cd6c40, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at gmain.c:3146
#38 0x000000387fa47ad4 in g_main_context_iteration (context=0x1cd6c40, may_block=1) at gmain.c:3207
#39 0x0000003886ba44e6 in QEventDispatcherGlib::processEvents (this=0x1c6bba0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#40 0x0000003887e6a2ee in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:207
#41 0x0000003886b7513f in QEventLoop::processEvents (this=this@entry=0x7fffff34ae30, flags=...) at kernel/qeventloop.cpp:149
#42 0x0000003886b753c8 in QEventLoop::exec (this=0x7fffff34ae30, flags=...) at kernel/qeventloop.cpp:204
#43 0x0000003886b7a1b8 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#44 0x000000389dc41105 in kdemain (argc=1, argv=0x7fffff34b128) at /usr/src/debug/kde-workspace-4.8.3/plasma/desktop/shell/main.cpp:120
#45 0x000000387fe21735 in __libc_start_main (main=0x4008b0 <main(int, char**)>, argc=1, ubp_av=0x7fffff34b128, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffff34b118) at libc-start.c:226
#46 0x00000000004008e1 in _start ()

Reported using DrKonqi