Application: kontact (4.14.1)
KDE Platform Version: 4.14.2
Qt Version: 4.8.6
Operating System: Linux 3.16.0-4-amd64 x86_64
Distribution: Debian GNU/Linux 8.1 (jessie)

-- Information about the crash:
In Kmail settings, selecting Appearance crashes kmail instantly every time.

The crash can be reproduced every time.

-- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f2aad5e5800 (LWP 3352))]

Thread 5 (Thread 0x7f2a8d5df700 (LWP 3353)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f2aa827006f in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f2aa82700a9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f2aa47ff0a4 in start_thread (arg=0x7f2a8d5df700) at pthread_create.c:309
#4  0x00007f2aaaa9404d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7f2a4ccd4700 (LWP 3354)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f2aa7f92973 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f2aa829f7f6 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f2aa47ff0a4 in start_thread (arg=0x7f2a4ccd4700) at pthread_create.c:309
#4  0x00007f2aaaa9404d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f2a3da88700 (LWP 3358)):
#0  0x00007f2aaaa8b50d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f2aa4317ee4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f2aa4317ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2aab217d37 in QEventDispatcherGlib::processEvents (this=0x7f2a380008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f2aab1e7271 in QEventLoop::processEvents (this=this@entry=0x7f2a3da87dd0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f2aab1e75d5 in QEventLoop::exec (this=this@entry=0x7f2a3da87dd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f2aab0dbe99 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:538
#7  0x00007f2aab0de70f in QThreadPrivate::start (arg=0xb62700) at thread/qthread_unix.cpp:349
#8  0x00007f2aa47ff0a4 in start_thread (arg=0x7f2a3da88700) at pthread_create.c:309
#9  0x00007f2aaaa9404d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f2a36f3c700 (LWP 3367)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f2a3fd0adea in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f2a3fd0ae19 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f2aa47ff0a4 in start_thread (arg=0x7f2a36f3c700) at pthread_create.c:309
#4  0x00007f2aaaa9404d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f2aad5e5800 (LWP 3352)):
[KCrash Handler]
#6  data (this=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:135
#7  qGetPtrHelper<QScopedPointer<QObjectData> > (p=...) at ../../include/QtCore/../../src/corelib/global/qglobal.h:2580
#8  d_func (this=<optimized out>) at widgets/qabstractbutton.h:171
#9  QAbstractButton::setChecked (this=0x0, checked=true) at widgets/qabstractbutton.cpp:738
#10 0x00007f2a44b5895d in load (this=0x2f5e230) at ../../kmail/configuredialog/configuredialog_p.cpp:82
#11 ConfigModuleWithTabs::load (this=0x2eb9100) at ../../kmail/configuredialog/configuredialog_p.cpp:52
#12 0x00007f2aaca19f59 in KCModule::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=<optimized out>, _c=<optimized out>) at ./kcmodule.moc:65
#13 0x00007f2aab201e11 in QObject::event (this=0x2eb9100, e=<optimized out>) at kernel/qobject.cpp:1222
#14 0x00007f2aabc5ac63 in QWidget::event (this=0x2eb9100, event=0x36b5d80) at kernel/qwidget.cpp:8859
#15 0x00007f2aabc0748c in QApplicationPrivate::notify_helper (this=this@entry=0x93a470, receiver=receiver@entry=0x2eb9100, e=e@entry=0x36b5d80) at kernel/qapplication.cpp:4570
#16 0x00007f2aabc0dfa8 in QApplication::notify (this=this@entry=0x7ffdb87753d0, receiver=receiver@entry=0x2eb9100, e=e@entry=0x36b5d80) at kernel/qapplication.cpp:4356
#17 0x00007f2aac97f1aa in KApplication::notify (this=0x7ffdb87753d0, receiver=0x2eb9100, event=0x36b5d80) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x00007f2aab1e871d in QCoreApplication::notifyInternal (this=0x7ffdb87753d0, receiver=receiver@entry=0x2eb9100, event=event@entry=0x36b5d80) at kernel/qcoreapplication.cpp:955
#19 0x00007f2aab1ebfc1 in sendEvent (event=0x36b5d80, receiver=0x2eb9100) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#20 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x8e0860) at kernel/qcoreapplication.cpp:1579
#21 0x00007f2aab1ec453 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1472
#22 0x00007f2aab217bd3 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#23 postEventSourceDispatch (s=0x919450) at kernel/qeventdispatcher_glib.cpp:280
#24 0x00007f2aa4317c5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f2aa4317f48 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f2aa4317ffc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f2aab217d1d in QEventDispatcherGlib::processEvents (this=0x8be860, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#28 0x00007f2aabcabf96 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#29 0x00007f2aab1e7271 in QEventLoop::processEvents (this=this@entry=0x7ffdb87752e0, flags=...) at kernel/qeventloop.cpp:149
#30 0x00007f2aab1e75d5 in QEventLoop::exec (this=this@entry=0x7ffdb87752e0, flags=...) at kernel/qeventloop.cpp:204
#31 0x00007f2aab1ed059 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1227
#32 0x00007f2aabc0592c in QApplication::exec () at kernel/qapplication.cpp:3828
#33 0x0000000000403509 in main (argc=1, argv=0x7ffdb8775528) at ../../../kontact/src/main.cpp:219

Possible duplicates by query: bug 234468, bug 231101.

Reported using DrKonqi