Bug 364657

KDE crashed during startup. The KDE crash handler showed up. I installed the requested debug info. I could not send the crash info from the crash handler, because kded was not running. I saved the debug info which I attached in 'Additional Information'

Reproducible: Sometimes

Steps to Reproduce:
One time shot. Could not re-produce it.



Application: kded4 (4.13.3)
KDE Platform Version: 4.13.3
Qt Version: 4.8.6
Operating System: Linux 3.13.0-58-generic x86_64
Distribution: Ubuntu 14.04.4 LTS

-- Information about the crash:
<In detail, tell us what you were doing  when the application crashed.>

-- Backtrace:
Application: KDE Daemon (kded4), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7efcce59b7c0 (LWP 5416))]

Thread 5 (Thread 0x7efcb1e7e700 (LWP 5418)):
#0  pthread_mutex_lock (mutex=0x7efcac000a60) at forward.c:192
#1  0x00007efcc8f48981 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efcc8f06a6c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efcc8f06f7b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007efcc8f070ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007efccd2417be in QEventDispatcherGlib::processEvents (this=0x7efcac0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0x00007efccd2130af in QEventLoop::processEvents (this=this@entry=0x7efcb1e7de20, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007efccd2133a5 in QEventLoop::exec (this=this@entry=0x7efcb1e7de20, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007efccd10fc5f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:537
#9  0x00007efccd11232f in QThreadPrivate::start (arg=0xcc4230) at thread/qthread_unix.cpp:349
#10 0x00007efcc95e9184 in start_thread (arg=0x7efcb1e7e700) at pthread_create.c:312
#11 0x00007efccbe1537d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7efca8ccd700 (LWP 5425)):
#0  0x00007efcc8f4861a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007efcc8f489a9 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efcc8f06680 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efcc8f06f03 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007efcc8f070ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007efccd2417be in QEventDispatcherGlib::processEvents (this=0x7efca40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0x00007efccd2130af in QEventLoop::processEvents (this=this@entry=0x7efca8cccde0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007efccd2133a5 in QEventLoop::exec (this=this@entry=0x7efca8cccde0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007efccd10fc5f in QThread::exec (this=this@entry=0xd53270) at thread/qthread.cpp:537
#9  0x00007efccd1f4823 in QInotifyFileSystemWatcherEngine::run (this=0xd53270) at io/qfilesystemwatcher_inotify.cpp:265
#10 0x00007efccd11232f in QThreadPrivate::start (arg=0xd53270) at thread/qthread_unix.cpp:349
#11 0x00007efcc95e9184 in start_thread (arg=0x7efca8ccd700) at pthread_create.c:312
#12 0x00007efccbe1537d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7efc93df9700 (LWP 5447)):
#0  0x00007efcc8f48626 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007efcc8f489a9 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efcc8f06680 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efcc8f06f03 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007efcc8f070ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007efccd2417be in QEventDispatcherGlib::processEvents (this=0x7efc800008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#6  0x00007efccd2130af in QEventLoop::processEvents (this=this@entry=0x7efc93df8de0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007efccd2133a5 in QEventLoop::exec (this=this@entry=0x7efc93df8de0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007efccd10fc5f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:537
#9  0x00007efcab125027 in KCupsConnection::run() () from /usr/lib/libkcupslib.so
#10 0x00007efccd11232f in QThreadPrivate::start (arg=0xcd0950) at thread/qthread_unix.cpp:349
#11 0x00007efcc95e9184 in start_thread (arg=0x7efc93df9700) at pthread_create.c:312
#12 0x00007efccbe1537d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
#12 0x00007efccbe1537d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7efc935f8700 (LWP 5448)):
#0  0x00007efccbe07fdd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007efcc8f06fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efcc8f070ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efccd2417be in QEventDispatcherGlib::processEvents (this=0x7efc840008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#4  0x00007efccd2130af in QEventLoop::processEvents (this=this@entry=0x7efc935f7e20, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007efccd2133a5 in QEventLoop::exec (this=this@entry=0x7efc935f7e20, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007efccd10fc5f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:537
#7  0x00007efccd11232f in QThreadPrivate::start (arg=0xcef550) at thread/qthread_unix.cpp:349
#8  0x00007efcc95e9184 in start_thread (arg=0x7efc935f8700) at pthread_create.c:312
#9  0x00007efccbe1537d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7efcce59b7c0 (LWP 5416)):
[KCrash Handler]
#6  0x00007efcb0597a28 in KScreen::Mode::size() const () from /usr/lib/libkscreen.so.1
#7  0x00007efcb07ae249 in Generator::biggestOutput (this=this@entry=0xcc9fe0, outputs=...) at /build/buildd/kscreen-1.0.2.1/kded/generator.cpp:474
#8  0x00007efcb07ae438 in Generator::extendToRight (this=this@entry=0xcc9fe0, outputs=...) at /build/buildd/kscreen-1.0.2.1/kded/generator.cpp:392
#9  0x00007efcb07ae9b6 in Generator::laptop (this=this@entry=0xcc9fe0, outputs=...) at /build/buildd/kscreen-1.0.2.1/kded/generator.cpp:337
#10 0x00007efcb07b09eb in Generator::idealConfig (this=0xcc9fe0) at /build/buildd/kscreen-1.0.2.1/kded/generator.cpp:88
#11 0x00007efcb07a8307 in KScreenDaemon::applyIdealConfig (this=this@entry=0xbd3d00) at /build/buildd/kscreen-1.0.2.1/kded/daemon.cpp:118
#12 0x00007efcb07a853e in KScreenDaemon::applyConfig (this=0xbd3d00) at /build/buildd/kscreen-1.0.2.1/kded/daemon.cpp:98
#13 0x00007efccd22887a in QMetaObject::activate (sender=0xcc9fe0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3539
#14 0x00007efccd22887a in QMetaObject::activate (sender=sender@entry=0xcab970, m=m@entry=0x7efcb09b7b40 <Device::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3539
#15 0x00007efcb07b1d34 in ready (this=0xcab970) at /build/buildd/kscreen-1.0.2.1/obj-x86_64-linux-gnu/kded/device.moc:113
#16 Device::setReady (this=this@entry=0xcab970) at /build/buildd/kscreen-1.0.2.1/kded/device.cpp:80
#17 0x00007efcb07b2d0e in setReady (this=0xcab970) at /build/buildd/kscreen-1.0.2.1/kded/device.cpp:148
#18 fetchIsDocked (this=0xcab970) at /build/buildd/kscreen-1.0.2.1/kded/device.cpp:157
#19 Device::isLidClosedFetched (this=0xcab970, watcher=0xcfef30) at /build/buildd/kscreen-1.0.2.1/kded/device.cpp:152
#20 0x00007efccd22887a in QMetaObject::activate (sender=0xcfef30, m=m@entry=0x7efcca7ec640 <QDBusPendingCallWatcher::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff3fe1d660) at kernel/qobject.cpp:3539
#21 0x00007efcca5ce0ef in QDBusPendingCallWatcher::finished (this=<optimized out>, _t1=0xcfef30) at .moc/release-shared/moc_qdbuspendingcall.cpp:105
#22 0x00007efccd22cc1e in QObject::event (this=0xcfef30, e=<optimized out>) at kernel/qobject.cpp:1194
#23 0x00007efccc5ade2c in QApplicationPrivate::notify_helper (this=this@entry=0xa5ef90, receiver=receiver@entry=0xcfef30, e=e@entry=0xcec3a0) at kernel/qapplication.cpp:4567
#24 0x00007efccc5b44a0 in QApplication::notify (this=this@entry=0x7fff3fe1ddb0, receiver=receiver@entry=0xcfef30, e=e@entry=0xcec3a0) at kernel/qapplication.cpp:4353
#25 0x00007efccdf93d1a in KApplication::notify (this=0x7fff3fe1ddb0, receiver=0xcfef30, event=0xcec3a0) at ../../kdeui/kernel/kapplication.cpp:311
#26 0x00007efccd2144dd in QCoreApplication::notifyInternal (this=0x7fff3fe1ddb0, receiver=receiver@entry=0xcfef30, event=event@entry=0xcec3a0) at kernel/qcoreapplication.cpp:953
#27 0x00007efccd217b3d in sendEvent (event=0xcec3a0, receiver=0xcfef30) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#28 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x9c5150) at kernel/qcoreapplication.cpp:1577
#29 0x00007efccd217fe3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#30 0x00007efccd241f83 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#31 postEventSourceDispatch (s=0xa5d5b0) at kernel/qeventdispatcher_glib.cpp:287
#32 0x00007efcc8f06e04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007efcc8f07048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007efcc8f070ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007efccd2417a1 in QEventDispatcherGlib::processEvents (this=0x9c76d0, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#36 0x00007efccc64fbe6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#37 0x00007efccd2130af in QEventLoop::processEvents (this=this@entry=0x7fff3fe1dc80, flags=...) at kernel/qeventloop.cpp:149
#38 0x00007efccd2133a5 in QEventLoop::exec (this=this@entry=0x7fff3fe1dc80, flags=...) at kernel/qeventloop.cpp:204
#39 0x00007efccd218b79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#40 0x00007efccc5ac37c in QApplication::exec () at kernel/qapplication.cpp:3828
#41 0x00007efcb777dd1b in kdemain (argc=1, argv=0xa41c90) at ../../kded/kded.cpp:940
#42 0x00000000004083ee in launch (argc=argc@entry=1, _name=_name@entry=0x40afc7 "kded4", args=args@entry=0x0, cwd=cwd@entry=0x0, envc=envc@entry=0, envs=<optimized out>, envs@entry=0x0, reset_env=reset_env@entry=false, tty=tty@entry=0x0, avoid_loops=avoid_loops@entry=false, startup_id_str=startup_id_str@entry=0x40ae56 "0") at ../../kinit/kinit.cpp:738
#43 0x00000000004059a3 in main (argc=4, argv=<optimized out>, envp=0x7fff3fe1e510) at ../../kinit/kinit.cpp:1853