Bug 330481

Application: plasma-desktop (4.11.3)
KDE Platform Version: 4.11.3
Qt Version: 4.8.4
Operating System: Linux 3.11.0-12-generic x86_64
Distribution: Linux Mint 16 Petra

-- Information about the crash:
Was cleaning up "taskbar" and was removing all widgets in order to rebuild.  When launcher was removed Plasma crashed.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f249530e7c0 (LWP 1761))]

Thread 5 (Thread 0x7f24758b2700 (LWP 1768)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f248dfa406b in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f248dfa40a9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f248865bf6e in start_thread (arg=0x7f24758b2700) at pthread_create.c:311
#4  0x00007f2494bf19cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 4 (Thread 0x7f23eb36e700 (LWP 1778)):
#0  QThreadData::current () at thread/qthread_unix.cpp:207
#1  0x00007f24917bd981 in postEventSourcePrepare (s=0x7f23e40012d0, timeout=0x7f23eb36dbb4) at kernel/qeventdispatcher_glib.cpp:256
#2  0x00007f2487f50d4d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2487f515c3 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f2487f517ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f24917bda76 in QEventDispatcherGlib::processEvents (this=0x7f23e40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f249178f5ef in QEventLoop::processEvents (this=this@entry=0x7f23eb36dd70, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f249178f8e5 in QEventLoop::exec (this=this@entry=0x7f23eb36dd70, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f249168e88f in QThread::exec (this=this@entry=0x21e3aa0) at thread/qthread.cpp:542
#9  0x00007f2491770d13 in QInotifyFileSystemWatcherEngine::run (this=0x21e3aa0) at io/qfilesystemwatcher_inotify.cpp:265
#10 0x00007f2491690f2f in QThreadPrivate::start (arg=0x21e3aa0) at thread/qthread_unix.cpp:338
#11 0x00007f248865bf6e in start_thread (arg=0x7f23eb36e700) at pthread_create.c:311
#12 0x00007f2494bf19cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7f23e8e8c700 (LWP 1796)):
#0  0x00007f248865e055 in __GI___pthread_mutex_lock (mutex=0x7f23dc00da60) at pthread_mutex_lock.c:95
#1  0x00007f2487f913a1 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2487f507f0 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2487f51565 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f2487f51b0a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f23e997bb66 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007f2487f760f5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f248865bf6e in start_thread (arg=0x7f23e8e8c700) at pthread_create.c:311
#8  0x00007f2494bf19cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7f23dbfff700 (LWP 1797)):
#0  0x00007f2487f910ea in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f2487f913c9 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2487f510e8 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2487f5163b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f2487f517ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f24917bda76 in QEventDispatcherGlib::processEvents (this=0x7f23d40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f249178f5ef in QEventLoop::processEvents (this=this@entry=0x7f23dbffed70, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f249178f8e5 in QEventLoop::exec (this=this@entry=0x7f23dbffed70, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f249168e88f in QThread::exec (this=this@entry=0x2facd00) at thread/qthread.cpp:542
#9  0x00007f2491770d13 in QInotifyFileSystemWatcherEngine::run (this=0x2facd00) at io/qfilesystemwatcher_inotify.cpp:265
#10 0x00007f2491690f2f in QThreadPrivate::start (arg=0x2facd00) at thread/qthread_unix.cpp:338
#11 0x00007f248865bf6e in start_thread (arg=0x7f23dbfff700) at pthread_create.c:311
#12 0x00007f2494bf19cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f249530e7c0 (LWP 1761)):
[KCrash Handler]
#6  0x0000000000000040 in ?? ()
#7  0x00007f249338c337 in QDeclarativeItem::~QDeclarativeItem (this=0x2e16470, __in_chrg=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:1668
#8  0x00007f2493353e96 in ~QDeclarativeElement (this=0x2e16470, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#9  QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::~QDeclarativeElement (this=0x2e16470, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#10 0x00007f24917a8e08 in QObject::event (this=0x2e16470, e=<optimized out>) at kernel/qobject.cpp:1175
#11 0x00007f2490b2ddfc in QApplicationPrivate::notify_helper (this=this@entry=0x21ce130, receiver=receiver@entry=0x2e16470, e=e@entry=0x36dc6f0) at kernel/qapplication.cpp:4567
#12 0x00007f2490b34470 in QApplication::notify (this=this@entry=0x218d990, receiver=receiver@entry=0x2e16470, e=e@entry=0x36dc6f0) at kernel/qapplication.cpp:4353
#13 0x00007f2492454a6a in KApplication::notify (this=0x218d990, receiver=0x2e16470, event=0x36dc6f0) at ../../kdeui/kernel/kapplication.cpp:311
#14 0x00007f24917908bd in QCoreApplication::notifyInternal (this=0x218d990, receiver=receiver@entry=0x2e16470, event=event@entry=0x36dc6f0) at kernel/qcoreapplication.cpp:946
#15 0x00007f2491793e1f in sendEvent (event=0x36dc6f0, receiver=0x2e16470) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#16 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x213b1f0) at kernel/qcoreapplication.cpp:1570
#17 0x00007f24917942c3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1463
#18 0x00007f24917be073 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#19 postEventSourceDispatch (s=0x21b06a0) at kernel/qeventdispatcher_glib.cpp:279
#20 0x00007f2487f513b6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f2487f51708 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f2487f517ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f24917bda55 in QEventDispatcherGlib::processEvents (this=0x213cad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#24 0x00007f2490bcf9d6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#25 0x00007f249178f5ef in QEventLoop::processEvents (this=this@entry=0x7fff44af7b60, flags=...) at kernel/qeventloop.cpp:149
#26 0x00007f249178f8e5 in QEventLoop::exec (this=this@entry=0x7fff44af7b60, flags=...) at kernel/qeventloop.cpp:204
#27 0x00007f2491794e5b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#28 0x00007f2490b2c34c in QApplication::exec () at kernel/qapplication.cpp:3828
#29 0x00007f2494efb27c in kdemain (argc=1, argv=0x7fff44af7db8) at ../../../../plasma/desktop/shell/main.cpp:126
#30 0x00007f2494b18de5 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, ubp_av=0x7fff44af7db8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff44af7da8) at libc-start.c:260
#31 0x000000000040070e in _start ()

Possible duplicates by query: bug 330395, bug 329968, bug 329657, bug 328331, bug 328303.

Reported using DrKonqi