Application: plasma-desktop (4.12.2)
KDE Platform Version: 4.12.2
Qt Version: 4.8.6
Operating System: Linux 3.11.0-12-generic x86_64
Distribution: Linux Mint 16 Petra

-- Information about the crash:
- What happened last session:
I was having internet issues, so I dug around.
*Modified /etc/network/interfaces
*Modified /etc/resolv.conf
*Ran "service wicd restart"
*Ran "service networking restart"
---- Plasma Desktop Crashed here, but did not produce a "good" backtrace as the only thing it produced was "Segmentation Fault 11" or something like that. Just one line. And yes I have ALL debugging symbols for my installed packages installed. ----
*Pinged google.com
*Ran "host google.com"
*Ran "dig google.com"
Internet was working now, but Plasma Desktop wasn't able to start as it was giving the exact same message as before everytime I tried to restart it. So I used tty1 logged in as root to restart KDM.
- What I was doing when the application crashed:
Logging in
- Unusual behavior I noticed:
An error popped up after logging in via KDM saying something about a file not existing.
After clicking ok on that error box, it showed my KDM splash, and after that I got the Plasma Desktop Shell has crash dialog. However, as you can see, it produced a worthy enough backtrace to be sent in.
- System:
OS: Linux Mint Petra (16) KDE Edition
Arch: amd64
Ram: 4GB Physical, 7.45GB Swap
Processor: AMD Phenom 9750 Quad-Core 2.4GHz
Storage: 160GB SATA HDD
KDE: 4.12.2 (upgraded via Kubuntu PPA)

The crash can be reproduced every time.

-- 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 0x7faee51807c0 (LWP 10443))]

Thread 4 (Thread 0x7faebbdbc700 (LWP 10444)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007faedde2af3b in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7faede128f00 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007faedde2af79 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007faed86e9f6e in start_thread (arg=0x7faebbdbc700) at pthread_create.c:311
#4  0x00007faee4a7f9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7fae2ffff700 (LWP 10449)):
#0  0x00007faee4a716bd in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007faed801e670 in read (__nbytes=16, __buf=0x7fae2fffece0, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  g_wakeup_acknowledge (wakeup=0x7fae280017c0) at /build/buildd/glib2.0-2.38.1/./glib/gwakeup.c:212
#3  0x00007faed7fdf1cc in g_main_context_check (context=context@entry=0x7fae2800d9a0, max_priority=2147483647, fds=fds@entry=0x7fae240010c0, n_fds=n_fds@entry=1) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3513
#4  0x00007faed7fdf63b in g_main_context_iterate (context=0x7fae2800d9a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3709
#5  0x00007faed7fdfb0a in g_main_loop_run (loop=0x7fae2800d930) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3906
#6  0x00007fae34b74b66 in gdbus_shared_thread_func (user_data=0x7fae2800d970) at /build/buildd/glib2.0-2.38.1/./gio/gdbusprivate.c:278
#7  0x00007faed80040f5 in g_thread_proxy (data=0x3067ed0) at /build/buildd/glib2.0-2.38.1/./glib/gthread.c:798
#8  0x00007faed86e9f6e in start_thread (arg=0x7fae2ffff700) at pthread_create.c:311
#9  0x00007faee4a7f9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7fae2f18f700 (LWP 10450)):
#0  0x00007faed86ed05f in __pthread_mutex_unlock_usercnt (mutex=0x7fae1c000a60, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  0x00007faed801f3d1 in g_mutex_unlock (mutex=mutex@entry=0x7fae1c0009a0) at /build/buildd/glib2.0-2.38.1/./glib/gthread-posix.c:232
#2  0x00007faed7fded40 in g_main_context_prepare (context=context@entry=0x7fae1c0009a0, priority=priority@entry=0x7fae2f18ec38) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3337
#3  0x00007faed7fdf5c3 in g_main_context_iterate (context=context@entry=0x7fae1c0009a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3692
#4  0x00007faed7fdf7ac in g_main_context_iteration (context=0x7fae1c0009a0, may_block=1) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3773
#5  0x00007faee1648af6 in QEventDispatcherGlib::processEvents (this=0x7fae1c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#6  0x00007faee161a30f in QEventLoop::processEvents (this=this@entry=0x7fae2f18ed70, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007faee161a605 in QEventLoop::exec (this=this@entry=0x7fae2f18ed70, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007faee1516c4f in QThread::exec (this=this@entry=0x2b381a0) at thread/qthread.cpp:537
#9  0x00007faee15fba33 in QInotifyFileSystemWatcherEngine::run (this=0x2b381a0) at io/qfilesystemwatcher_inotify.cpp:265
#10 0x00007faee151931f in QThreadPrivate::start (arg=0x2b381a0) at thread/qthread_unix.cpp:349
#11 0x00007faed86e9f6e in start_thread (arg=0x7fae2f18f700) at pthread_create.c:311
#12 0x00007faee4a7f9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7faee51807c0 (LWP 10443)):
[KCrash Handler]
#6  ref (this=0x0) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86_64.h:121
#7  QString::operator= (this=0x7fff19cc0760, other=...) at tools/qstring.cpp:1410
#8  0x00007fae2d6255da in ?? () from /usr/lib/kde4/plasma_engine_wicd.so
#9  0x00007faee459f671 in Plasma::DataEngineManager::loadEngine (this=0x2a6e080, name=...) at ../../plasma/dataenginemanager.cpp:140
#10 0x00007faee45d0a6b in Plasma::DataEngineConsumer::dataEngine (this=0x3022b40, name=...) at ../../plasma/private/dataengineconsumer.cpp:105
#11 0x00007faee4567f7c in Plasma::Applet::dataEngine (this=0x2f97c00, name=...) at ../../plasma/applet.cpp:685
#12 0x00007fae35f014d8 in ?? () from /usr/lib/kde4/plasma_applet_wicd.so
#13 0x00007faebc86f040 in SystemTray::PlasmoidTask::createWidget (this=0x3027c90, host=<optimized out>) at ../../../../../plasma/generic/applets/systemtray/protocols/plasmoid/plasmoidtask.cpp:100
#14 0x00007faebc867650 in SystemTray::Task::widget (this=this@entry=0x3027c90, host=host@entry=0x2b25c20, createIfNecessary=createIfNecessary@entry=true) at ../../../../../plasma/generic/applets/systemtray/core/task.cpp:76
#15 0x00007faebc87ae80 in SystemTray::Applet::_onAddedTask (this=this@entry=0x2b25c20, task=0x3027c90) at ../../../../../plasma/generic/applets/systemtray/ui/applet.cpp:196
#16 0x00007faebc87b24b in SystemTray::Applet::_onWidgetCreationFinished (this=0x2b25c20) at ../../../../../plasma/generic/applets/systemtray/ui/applet.cpp:278
#17 0x00007faebc87b525 in SystemTray::Applet::qt_static_metacall (_o=0x7fff19cc0760, _id=-510125992, _a=0x7fff19cc0d90, _c=<optimized out>) at ./applet.moc:143
#18 0x00007faee162fae8 in QMetaObject::activate (sender=0x2d70fa0, m=m@entry=0x7faee4977040 <Plasma::DeclarativeWidget::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3539
#19 0x00007faee463f110 in Plasma::DeclarativeWidget::finished (this=<optimized out>) at ./declarativewidget.moc:156
#20 0x00007faee463f86f in Plasma::DeclarativeWidgetPrivate::finishExecute (this=0x2d70dd0) at ../../plasma/widgets/declarativewidget.cpp:216
#21 0x00007faee1633e9e in QObject::event (this=this@entry=0x2d70fa0, e=e@entry=0x2ecd060) at kernel/qobject.cpp:1194
#22 0x00007faee0fb503b in QGraphicsWidget::event (this=0x2d70fa0, event=0x2ecd060) at graphicsview/qgraphicswidget.cpp:1461
#23 0x00007faee09b4e7c in QApplicationPrivate::notify_helper (this=this@entry=0x267aa40, receiver=receiver@entry=0x2d70fa0, e=e@entry=0x2ecd060) at kernel/qapplication.cpp:4567
#24 0x00007faee09bb4f0 in QApplication::notify (this=this@entry=0x266b2e0, receiver=receiver@entry=0x2d70fa0, e=e@entry=0x2ecd060) at kernel/qapplication.cpp:4353
#25 0x00007faee22e1c6a in KApplication::notify (this=0x266b2e0, receiver=0x2d70fa0, event=0x2ecd060) at ../../kdeui/kernel/kapplication.cpp:311
#26 0x00007faee161b73d in QCoreApplication::notifyInternal (this=0x266b2e0, receiver=receiver@entry=0x2d70fa0, event=event@entry=0x2ecd060) at kernel/qcoreapplication.cpp:953
#27 0x00007faee161edaf in sendEvent (event=0x2ecd060, receiver=0x2d70fa0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#28 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x25e71f0) at kernel/qcoreapplication.cpp:1577
#29 0x00007faee161f253 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#30 0x00007faee1649213 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#31 postEventSourceDispatch (s=s@entry=0x2674350) at kernel/qeventdispatcher_glib.cpp:280
#32 0x00007faed7fdf3b6 in g_main_dispatch (context=0x267ae10) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3065
#33 g_main_context_dispatch (context=context@entry=0x267ae10) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3641
#34 0x00007faed7fdf708 in g_main_context_iterate (context=context@entry=0x267ae10, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3712
#35 0x00007faed7fdf7ac in g_main_context_iteration (context=0x267ae10, may_block=1) at /build/buildd/glib2.0-2.38.1/./glib/gmain.c:3773
#36 0x00007faee1648ad5 in QEventDispatcherGlib::processEvents (this=0x25e8af0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#37 0x00007faee0a56cb6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#38 0x00007faee161a30f in QEventLoop::processEvents (this=this@entry=0x7fff19cc1500, flags=...) at kernel/qeventloop.cpp:149
#39 0x00007faee161a605 in QEventLoop::exec (this=this@entry=0x7fff19cc1500, flags=...) at kernel/qeventloop.cpp:204
#40 0x00007faee161fdeb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#41 0x00007faee09b33cc in QApplication::exec () at kernel/qapplication.cpp:3828
#42 0x00007faee4d8964c in kdemain (argc=1, argv=0x7fff19cc1758) at ../../../../plasma/desktop/shell/main.cpp:126
#43 0x00007faee49a6de5 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, ubp_av=0x7fff19cc1758, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff19cc1748) at libc-start.c:260
#44 0x000000000040070e in _start ()

Possible duplicates by query: bug 207830.

Reported using DrKonqi