Application: plasma-desktop (4.11.5)
KDE Platform Version: 4.11.5
Qt Version: 4.8.4
Operating System: Linux 3.11.0-12-generic x86_64
Distribution: Linux Mint 16 Petra

-- Information about the crash:
- What I was doing when the application crashed:  I opened the "Add Widgets" window from the bottom panel and then clicked "Activities"

- Unusual behavior I noticed:  The Plasma Desktop crashed after trying this. The left panel seems to bring up the Activity window with no issues. The "Activity Manager" widget also works.

- Custom settings of the application: The only thing I can think of that would affect this is that I have two panels. A left panel and a bottom panel. The left panel was placed first and sometimes the crash can be avoided if I use the left panel to bring up the Activity window.

The crash can be reproduced sometimes.

-- 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 0x7f5d09d557c0 (LWP 21130))]

Thread 4 (Thread 0x7f5cdb7f8700 (LWP 21131)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5d029f106b in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f5d029f10a9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f5cfd0a8f6e in start_thread (arg=0x7f5cdb7f8700) at pthread_create.c:311
#4  0x00007f5d0963d9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7f5cd9090700 (LWP 21132)):
#0  0x00007f5d09630f7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f5cfc99e6a4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5cfc99e7ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5d0620aa76 in QEventDispatcherGlib::processEvents (this=0x7f5c4c0008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f5d061dc5ef in QEventLoop::processEvents (this=this@entry=0x7f5cd908fd70, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f5d061dc8e5 in QEventLoop::exec (this=this@entry=0x7f5cd908fd70, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f5d060db88f in QThread::exec (this=this@entry=0x2558600) at thread/qthread.cpp:542
#7  0x00007f5d061bdd13 in QInotifyFileSystemWatcherEngine::run (this=0x2558600) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007f5d060ddf2f in QThreadPrivate::start (arg=0x2558600) at thread/qthread_unix.cpp:338
#9  0x00007f5cfd0a8f6e in start_thread (arg=0x7f5cd9090700) at pthread_create.c:311
#10 0x00007f5d0963d9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7f5c47be5700 (LWP 21141)):
#0  0x00007f5d06132781 in qt_gettime () at tools/qelapsedtimer_unix.cpp:146
#1  0x00007f5d0620bfe5 in updateCurrentTime (this=0x7f5c40002860) at kernel/qeventdispatcher_unix.cpp:354
#2  QTimerInfoList::timerWait (this=0x7f5c40002860, tm=...) at kernel/qeventdispatcher_unix.cpp:461
#3  0x00007f5d0620a82c in timerSourcePrepareHelper (src=<optimized out>, timeout=0x7f5c47be4bb4) at kernel/qeventdispatcher_glib.cpp:136
#4  0x00007f5d0620a8d5 in timerSourcePrepare (source=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#5  0x00007f5cfc99dd4d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f5cfc99e5c3 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f5cfc99e7ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f5d0620aa76 in QEventDispatcherGlib::processEvents (this=0x7f5c400008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#9  0x00007f5d061dc5ef in QEventLoop::processEvents (this=this@entry=0x7f5c47be4d70, flags=...) at kernel/qeventloop.cpp:149
#10 0x00007f5d061dc8e5 in QEventLoop::exec (this=this@entry=0x7f5c47be4d70, flags=...) at kernel/qeventloop.cpp:204
#11 0x00007f5d060db88f in QThread::exec (this=this@entry=0x3722490) at thread/qthread.cpp:542
#12 0x00007f5d061bdd13 in QInotifyFileSystemWatcherEngine::run (this=0x3722490) at io/qfilesystemwatcher_inotify.cpp:265
#13 0x00007f5d060ddf2f in QThreadPrivate::start (arg=0x3722490) at thread/qthread_unix.cpp:338
#14 0x00007f5cfd0a8f6e in start_thread (arg=0x7f5c47be5700) at pthread_create.c:311
#15 0x00007f5d0963d9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f5d09d557c0 (LWP 21130)):
[KCrash Handler]
#6  0x00007f5d07dd9334 in QDeclarativeItem::~QDeclarativeItem (this=0x71de0a0, __in_chrg=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:1668
#7  0x00007f5cda858aa1 in ~QDeclarativeElement (this=0x71de0a0, __in_chrg=<optimized out>) at /usr/include/qt4/QtDeclarative/qdeclarativeprivate.h:87
#8  QDeclarativePrivate::QDeclarativeElement<Plasma::FrameSvgItem>::~QDeclarativeElement (this=0x71de0a0, __in_chrg=<optimized out>) at /usr/include/qt4/QtDeclarative/qdeclarativeprivate.h:87
#9  0x00007f5d061f5e08 in QObject::event (this=0x71de0a0, e=<optimized out>) at kernel/qobject.cpp:1175
#10 0x00007f5d0557adfc in QApplicationPrivate::notify_helper (this=this@entry=0x134b3e0, receiver=receiver@entry=0x71de0a0, e=e@entry=0x5ee7840) at kernel/qapplication.cpp:4567
#11 0x00007f5d05581470 in QApplication::notify (this=this@entry=0x12f1b10, receiver=receiver@entry=0x71de0a0, e=e@entry=0x5ee7840) at kernel/qapplication.cpp:4353
#12 0x00007f5d06ea1a6a in KApplication::notify (this=0x12f1b10, receiver=0x71de0a0, event=0x5ee7840) at ../../kdeui/kernel/kapplication.cpp:311
#13 0x00007f5d061dd8bd in QCoreApplication::notifyInternal (this=0x12f1b10, receiver=receiver@entry=0x71de0a0, event=event@entry=0x5ee7840) at kernel/qcoreapplication.cpp:946
#14 0x00007f5d061e0e1f in sendEvent (event=0x5ee7840, receiver=0x71de0a0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#15 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x122a1f0) at kernel/qcoreapplication.cpp:1570
#16 0x00007f5d061e12c3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1463
#17 0x00007f5d0620b073 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#18 postEventSourceDispatch (s=0x12e86a0) at kernel/qeventdispatcher_glib.cpp:279
#19 0x00007f5cfc99e3b6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f5cfc99e708 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f5cfc99e7ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f5d0620aa55 in QEventDispatcherGlib::processEvents (this=0x122bad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#23 0x00007f5d0561c9d6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#24 0x00007f5d061dc5ef in QEventLoop::processEvents (this=this@entry=0x7ffff02a3750, flags=...) at kernel/qeventloop.cpp:149
#25 0x00007f5d061dc8e5 in QEventLoop::exec (this=this@entry=0x7ffff02a3750, flags=...) at kernel/qeventloop.cpp:204
#26 0x00007f5d061e1e5b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#27 0x00007f5d0557934c in QApplication::exec () at kernel/qapplication.cpp:3828
#28 0x00007f5d0994764c in kdemain (argc=1, argv=0x7ffff02a39a8) at ../../../../plasma/desktop/shell/main.cpp:126
#29 0x00007f5d09564de5 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, ubp_av=0x7ffff02a39a8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffff02a3998) at libc-start.c:260
#30 0x000000000040070e in _start ()

Possible duplicates by query: bug 332277, bug 332092, bug 331300, bug 331222, bug 331058.

Reported using DrKonqi