Bug 368134

Application: plasma-desktop (4.11.11)
KDE Platform Version: 4.14.2
Qt Version: 4.8.6
Operating System: Linux 4.4.0-34-generic x86_64
Distribution: Linux Mint 17.3 Rosa

-- Information about the crash:
- What I was doing when the application crashed: Attempting to modify panel widgets, add system tray widget. Using 2 displays both with similar panels

- Unusual behavior I noticed: started stuttering hard, wouldn't respond, acted as if it added wdiget but saw no widget

-- 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 0x7fb9538727c0 (LWP 2520))]

Thread 5 (Thread 0x7fb929e1e700 (LWP 2522)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb94c526ffb in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007fb94c527039 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007fb94709d184 in start_thread (arg=0x7fb929e1e700) at pthread_create.c:312
#4  0x00007fb95316837d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7fb8a46a4700 (LWP 2523)):
#0  0x00007fffe1d9bd7f in clock_gettime ()
#1  0x00007fb95317685d in __GI___clock_gettime (clock_id=<optimized out>, tp=<optimized out>) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007fb94fc61ad7 in do_gettime (frac=0x7fb8a46a3b70, sec=0x7fb8a46a3b68) at tools/qelapsedtimer_unix.cpp:127
#3  qt_gettime () at tools/qelapsedtimer_unix.cpp:144
#4  0x00007fb94fd3df05 in updateCurrentTime (this=0x7fb89c003130) at kernel/qeventdispatcher_unix.cpp:354
#5  QTimerInfoList::timerWait (this=0x7fb89c003130, tm=...) at kernel/qeventdispatcher_unix.cpp:460
#6  0x00007fb94fd3c67c in timerSourcePrepareHelper (src=<optimized out>, timeout=0x7fb8a46a3c24) at kernel/qeventdispatcher_glib.cpp:143
#7  0x00007fb94fd3c725 in timerSourcePrepare (source=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:176
#8  0x00007fb94698b68d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007fb94698bf03 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007fb94698c0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007fb94fd3c7be in QEventDispatcherGlib::processEvents (this=0x7fb89c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#12 0x00007fb94fd0e0af in QEventLoop::processEvents (this=this@entry=0x7fb8a46a3de0, flags=...) at kernel/qeventloop.cpp:149
#13 0x00007fb94fd0e3a5 in QEventLoop::exec (this=this@entry=0x7fb8a46a3de0, flags=...) at kernel/qeventloop.cpp:204
#14 0x00007fb94fc0ac5f in QThread::exec (this=this@entry=0x2045f50) at thread/qthread.cpp:537
#15 0x00007fb94fcef823 in QInotifyFileSystemWatcherEngine::run (this=0x2045f50) at io/qfilesystemwatcher_inotify.cpp:265
#16 0x00007fb94fc0d32f in QThreadPrivate::start (arg=0x2045f50) at thread/qthread_unix.cpp:349
#17 0x00007fb94709d184 in start_thread (arg=0x7fb8a46a4700) at pthread_create.c:312
#18 0x00007fb95316837d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7fb8a21b2700 (LWP 2525)):
#0  0x00007fb9469cd9b1 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb94698bbda in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb94698c048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb94698c30a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb8a2cae336 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#5  0x00007fb9469b0f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fb94709d184 in start_thread (arg=0x7fb8a21b2700) at pthread_create.c:312
#7  0x00007fb95316837d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7fb8a1339700 (LWP 2526)):
#0  0x00007fffe1d9bd7f in clock_gettime ()
#1  0x00007fb95317685d in __GI___clock_gettime (clock_id=<optimized out>, tp=<optimized out>) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007fb94fc61ad7 in do_gettime (frac=0x7fb8a1338b70, sec=0x7fb8a1338b68) at tools/qelapsedtimer_unix.cpp:127
#3  qt_gettime () at tools/qelapsedtimer_unix.cpp:144
#4  0x00007fb94fd3df05 in updateCurrentTime (this=0x7fb88c002930) at kernel/qeventdispatcher_unix.cpp:354
#5  QTimerInfoList::timerWait (this=0x7fb88c002930, tm=...) at kernel/qeventdispatcher_unix.cpp:460
#6  0x00007fb94fd3c67c in timerSourcePrepareHelper (src=<optimized out>, timeout=0x7fb8a1338c24) at kernel/qeventdispatcher_glib.cpp:143
#7  0x00007fb94fd3c725 in timerSourcePrepare (source=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:176
#8  0x00007fb94698b68d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007fb94698bf03 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007fb94698c0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007fb94fd3c7be in QEventDispatcherGlib::processEvents (this=0x7fb88c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#12 0x00007fb94fd0e0af in QEventLoop::processEvents (this=this@entry=0x7fb8a1338de0, flags=...) at kernel/qeventloop.cpp:149
#13 0x00007fb94fd0e3a5 in QEventLoop::exec (this=this@entry=0x7fb8a1338de0, flags=...) at kernel/qeventloop.cpp:204
#14 0x00007fb94fc0ac5f in QThread::exec (this=this@entry=0x2ddf160) at thread/qthread.cpp:537
#15 0x00007fb94fcef823 in QInotifyFileSystemWatcherEngine::run (this=0x2ddf160) at io/qfilesystemwatcher_inotify.cpp:265
#16 0x00007fb94fc0d32f in QThreadPrivate::start (arg=0x2ddf160) at thread/qthread_unix.cpp:349
#17 0x00007fb94709d184 in start_thread (arg=0x7fb8a1339700) at pthread_create.c:312
#18 0x00007fb95316837d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7fb9538727c0 (LWP 2520)):
[KCrash Handler]
#6  0x00000000025b56c0 in ?? ()
#7  0x00007fb94fd24994 in QObject::connect (sender=sender@entry=0x52dcd20, signal=signal@entry=0x7fb92ad96569 "2destroyed()", receiver=receiver@entry=0x4ed2f90, method=method@entry=0x7fb92ad96558 "1widgetDeleted()", type=type@entry=Qt::AutoConnection) at kernel/qobject.cpp:2546
#8  0x00007fb92ad7e69f in SystemTray::Task::widget (this=this@entry=0x4ed2f90, host=host@entry=0x27c3430, createIfNecessary=createIfNecessary@entry=true) at ../../../../../plasma/generic/applets/systemtray/core/task.cpp:80
#9  0x00007fb92ad92010 in SystemTray::Applet::_onAddedTask (this=this@entry=0x27c3430, task=0x4ed2f90) at ../../../../../plasma/generic/applets/systemtray/ui/applet.cpp:196
#10 0x00007fb92ad923cb in SystemTray::Applet::_onWidgetCreationFinished (this=0x27c3430) at ../../../../../plasma/generic/applets/systemtray/ui/applet.cpp:278
#11 0x00007fb92ad926a5 in SystemTray::Applet::qt_static_metacall (_o=0x52dcd20, _id=718890345, _a=0x7fffe1c833a0, _c=<optimized out>) at ./applet.moc:143
#12 0x00007fb94fd2387a in QMetaObject::activate (sender=0x6873670, m=m@entry=0x7fb953060040 <Plasma::DeclarativeWidget::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3539
#13 0x00007fb952d287d0 in Plasma::DeclarativeWidget::finished (this=<optimized out>) at ./declarativewidget.moc:156
#14 0x00007fb952d28f2f in Plasma::DeclarativeWidgetPrivate::finishExecute (this=0x5cce5b0) at ../../plasma/widgets/declarativewidget.cpp:216
#15 0x00007fb94fd27c1e in QObject::event (this=this@entry=0x6873670, e=e@entry=0x47ef5f0) at kernel/qobject.cpp:1194
#16 0x00007fb94f6a84fb in QGraphicsWidget::event (this=0x6873670, event=0x47ef5f0) at graphicsview/qgraphicswidget.cpp:1461
#17 0x00007fb94f0a8e2c in QApplicationPrivate::notify_helper (this=this@entry=0x2009090, receiver=receiver@entry=0x6873670, e=e@entry=0x47ef5f0) at kernel/qapplication.cpp:4567
#18 0x00007fb94f0af4a0 in QApplication::notify (this=this@entry=0x2005d70, receiver=receiver@entry=0x6873670, e=e@entry=0x47ef5f0) at kernel/qapplication.cpp:4353
#19 0x00007fb9509d4cca in KApplication::notify (this=0x2005d70, receiver=0x6873670, event=0x47ef5f0) at ../../kdeui/kernel/kapplication.cpp:311
#20 0x00007fb94fd0f4dd in QCoreApplication::notifyInternal (this=0x2005d70, receiver=receiver@entry=0x6873670, event=event@entry=0x47ef5f0) at kernel/qcoreapplication.cpp:953
#21 0x00007fb94fd12b3d in sendEvent (event=0x47ef5f0, receiver=0x6873670) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#22 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1f8d090) at kernel/qcoreapplication.cpp:1577
#23 0x00007fb94fd12fe3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#24 0x00007fb94fd3cf83 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#25 postEventSourceDispatch (s=0x2009570) at kernel/qeventdispatcher_glib.cpp:287
#26 0x00007fb94698be04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007fb94698c048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007fb94698c0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007fb94fd3c7a1 in QEventDispatcherGlib::processEvents (this=0x1f8e990, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#30 0x00007fb94f14abe6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#31 0x00007fb94fd0e0af in QEventLoop::processEvents (this=this@entry=0x7fffe1c83b00, flags=...) at kernel/qeventloop.cpp:149
#32 0x00007fb94fd0e3a5 in QEventLoop::exec (this=this@entry=0x7fffe1c83b00, flags=...) at kernel/qeventloop.cpp:204
#33 0x00007fb94fd13b79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#34 0x00007fb94f0a737c in QApplication::exec () at kernel/qapplication.cpp:3828
#35 0x00007fb95346f67c in kdemain (argc=1, argv=0x7fffe1c83d58) at ../../../../plasma/desktop/shell/main.cpp:126
#36 0x00007fb95308ff45 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, argv=0x7fffe1c83d58, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffe1c83d48) at libc-start.c:287
#37 0x000000000040070e in _start ()

Reported using DrKonqi