Application: kdevelop (4.3.0)
KDE Platform Version: 4.8.2 (4.8.2)
Qt Version: 4.8.1
Operating System: Linux 3.3.0-4.fc16.x86_64 x86_64
Distribution: "RFRemix release 16.1 (Verne)"

-- Information about the crash:
- What I was doing when the application crashed:
I've removed all kdevelop files from ~/.kde
start kdevelop
choose 
Settings -> Configure Kdevelop -> Source Formater
kdevelop crashed

The crash can be reproduced every time.

-- Backtrace:
Application: KDevelop (kdevelop), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
82	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[Current thread is 1 (Thread 0x7f9a0821b9c0 (LWP 5424))]

Thread 5 (Thread 0x7f99fd550700 (LWP 5425)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:216
#1  0x000000376c27bf8f in wait (time=1000, this=0x200ced0) at thread/qwaitcondition_unix.cpp:84
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x200a170, time=1000) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f9a0850170b in ?? () from /usr/lib64/libkdevplatformlanguage.so.5
#4  0x000000376c27bb1b in QThreadPrivate::start (arg=0x200a150) at thread/qthread_unix.cpp:298
#5  0x00000034a1a07d90 in start_thread (arg=0x7f99fd550700) at pthread_create.c:309
#6  0x00000034a12f0f5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 4 (Thread 0x7f99f5def700 (LWP 5426)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:165
#1  0x000000355a3b86ec in ?? () from /usr/lib64/libQtWebKit.so.4
#2  0x000000355a3b8819 in ?? () from /usr/lib64/libQtWebKit.so.4
#3  0x00000034a1a07d90 in start_thread (arg=0x7f99f5def700) at pthread_create.c:309
#4  0x00000034a12f0f5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 3 (Thread 0x7f99f54d6700 (LWP 5427)):
#0  next_valid_source (source=0x7f99f0001330, context=0x7f99f00009a0) at gmain.c:2495
#1  g_main_context_prepare (context=0x7f99f00009a0, priority=0x7f99f54d5a98) at gmain.c:2795
#2  0x00000034a3244e6d in g_main_context_iterate (context=0x7f99f00009a0, block=1, dispatch=1, self=<optimized out>) at gmain.c:3069
#3  0x00000034a324549c in g_main_context_iteration (context=0x7f99f00009a0, may_block=1) at gmain.c:3152
#4  0x000000376c3a8626 in QEventDispatcherGlib::processEvents (this=0x7f99f00008c0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:426
#5  0x000000376c378a12 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x000000376c378c67 in QEventLoop::exec (this=0x7f99f54d5bc0, flags=...) at kernel/qeventloop.cpp:204
#7  0x000000376c278ad7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#8  0x000000376c27bb1b in QThreadPrivate::start (arg=0x28a7800) at thread/qthread_unix.cpp:298
#9  0x00000034a1a07d90 in start_thread (arg=0x7f99f54d6700) at pthread_create.c:309
#10 0x00000034a12f0f5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 2 (Thread 0x7f99ac945700 (LWP 5446)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:165
#1  0x0000003775784db2 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x3775a7e140) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x0000003775784de9 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00000034a1a07d90 in start_thread (arg=0x7f99ac945700) at pthread_create.c:309
#4  0x00000034a12f0f5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 1 (Thread 0x7f9a0821b9c0 (LWP 5424)):
[KCrash Handler]
#6  ucstrncmp (a=0x300000002, b=0x0, l=0) at tools/qstring.cpp:203
#7  0x000000376c2be0a7 in ucstrcmp (a=<optimized out>, alen=<optimized out>, b=<optimized out>, blen=1262649344) at tools/qstring.cpp:216
#8  0x000000376c2c1649 in QString::operator< (this=<optimized out>, other=<optimized out>) at tools/qstring.cpp:2257
#9  0x00007f99aca09bf8 in qMapLessThanKey<QString> (key2=..., key1=...) at /usr/include/QtCore/qmap.h:107
#10 QMap<QString, KDevelop::SourceFormatterStyle>::mutableFindNode (this=0x7fff302d7eb8, aupdate=<optimized out>, akey=...) at /usr/include/QtCore/qmap.h:782
#11 0x00007f99aca0572b in operator[] (akey=..., this=0x7fff302d7eb8) at /usr/include/QtCore/qmap.h:529
#12 SourceFormatterSettings::load (this=0x3a00c30) at /home/nikita/redhat/SOURCES/kdevplatform/shell/settings/sourceformattersettings.cpp:118
#13 0x00007f99aca04ef1 in SourceFormatterSettings::qt_metacall (this=0x3a00c30, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x3e824f0) at /home/nikita/redhat/SOURCES/kdevplatform/build/shell/settings/sourceformattersettings.moc:85
#14 0x000000376c3927a6 in QObject::event (this=0x3a00c30, e=<optimized out>) at kernel/qobject.cpp:1195
#15 0x000000376ca19b0b in QWidget::event (this=0x3a00c30, event=0x3c677d0) at kernel/qwidget.cpp:8821
#16 0x000000376c9c9bc4 in notify_helper (e=0x3c677d0, receiver=0x3a00c30, this=0xc2fc60) at kernel/qapplication.cpp:4554
#17 QApplicationPrivate::notify_helper (this=0xc2fc60, receiver=0x3a00c30, e=0x3c677d0) at kernel/qapplication.cpp:4526
#18 0x000000376c9cea43 in QApplication::notify (this=0x7fff302daa40, receiver=0x3a00c30, e=0x3c677d0) at kernel/qapplication.cpp:4415
#19 0x0000003554051f96 in KApplication::notify (this=0x7fff302daa40, receiver=0x3a00c30, event=0x3c677d0) at /usr/src/debug/kdelibs-4.8.2/kdeui/kernel/kapplication.cpp:311
#20 0x000000376c3798dc in QCoreApplication::notifyInternal (this=0x7fff302daa40, receiver=0x3a00c30, event=0x3c677d0) at kernel/qcoreapplication.cpp:876
#21 0x000000376c37d36a in sendEvent (event=0x3c677d0, receiver=0x3a00c30) at kernel/qcoreapplication.h:231
#22 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0xbf95b0) at kernel/qcoreapplication.cpp:1500
#23 0x000000376c3a8193 in sendPostedEvents () at kernel/qcoreapplication.h:236
#24 postEventSourceDispatch (s=0xc320f0) at kernel/qeventdispatcher_glib.cpp:279
#25 0x00000034a3244acd in g_main_dispatch (context=0xc32000) at gmain.c:2441
#26 g_main_context_dispatch (context=0xc32000) at gmain.c:3011
#27 0x00000034a32452c8 in g_main_context_iterate (context=0xc32000, block=<optimized out>, dispatch=1, self=<optimized out>) at gmain.c:3089
#28 0x00000034a324549c in g_main_context_iteration (context=0xc32000, may_block=1) at gmain.c:3152
#29 0x000000376c3a85bf in QEventDispatcherGlib::processEvents (this=0xbfaa70, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#30 0x000000376ca6c8ce in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:207
#31 0x000000376c378a12 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#32 0x000000376c378c67 in QEventLoop::exec (this=0x7fff302d8cf0, flags=...) at kernel/qeventloop.cpp:204
#33 0x000000376ce8ea96 in QDialog::exec (this=0x7fff302d8d50) at dialogs/qdialog.cpp:554
#34 0x00007f9a0964edca in KDevelop::UiController::showSettingsDialog() () from /usr/lib64/libkdevplatformshell.so.5
#35 0x00007f9a0963f79a in ?? () from /usr/lib64/libkdevplatformshell.so.5
#36 0x000000376c38d571 in QMetaObject::activate (sender=0xea10f0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff302d8fc0) at kernel/qobject.cpp:3547
#37 0x000000376c9c39e2 in QAction::triggered (this=<optimized out>, _t1=false) at .moc/release-shared/moc_qaction.cpp:276
#38 0x000000376c9c3bcf in QAction::activate (this=0xea10f0, event=<optimized out>) at kernel/qaction.cpp:1257
#39 0x000000376ce0bbd9 in QMenuPrivate::activateCausedStack (this=0x1fb3d40, causedStack=..., action=0xea10f0, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:1028
#40 0x000000376ce11d22 in QMenuPrivate::activateAction (this=0x1fb3d40, action=0xea10f0, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:1120
#41 0x00000035541131a0 in KMenu::mouseReleaseEvent (this=0x1fb8870, e=0x7fff302d9b90) at /usr/src/debug/kdelibs-4.8.2/kdeui/widgets/kmenu.cpp:464
#42 0x000000376ca1a0da in QWidget::event (this=0x1fb8870, event=0x7fff302d9b90) at kernel/qwidget.cpp:8362
#43 0x000000376ce132bb in QMenu::event (this=0x1fb8870, e=0x7fff302d9b90) at widgets/qmenu.cpp:2469
#44 0x000000376c9c9bc4 in notify_helper (e=0x7fff302d9b90, receiver=0x1fb8870, this=0xc2fc60) at kernel/qapplication.cpp:4554
#45 QApplicationPrivate::notify_helper (this=0xc2fc60, receiver=0x1fb8870, e=0x7fff302d9b90) at kernel/qapplication.cpp:4526
#46 0x000000376c9cf313 in QApplication::notify (this=<optimized out>, receiver=0x1fb8870, e=0x7fff302d9b90) at kernel/qapplication.cpp:4097
#47 0x0000003554051f96 in KApplication::notify (this=0x7fff302daa40, receiver=0x1fb8870, event=0x7fff302d9b90) at /usr/src/debug/kdelibs-4.8.2/kdeui/kernel/kapplication.cpp:311
#48 0x000000376c3798dc in QCoreApplication::notifyInternal (this=0x7fff302daa40, receiver=0x1fb8870, event=0x7fff302d9b90) at kernel/qcoreapplication.cpp:876
#49 0x000000376c9cab92 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../src/corelib/kernel/qcoreapplication.h:231
#50 QApplicationPrivate::sendMouseEvent (receiver=0x1fb8870, event=0x7fff302d9b90, alienWidget=0x0, nativeWidget=0x1fb8870, buttonDown=0x0, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3165
#51 0x000000376ca46a61 in QETWidget::translateMouseEvent (this=0x1fb8870, event=<optimized out>) at kernel/qapplication_x11.cpp:4457
#52 0x000000376ca4525a in QApplication::x11ProcessEvent (this=0x7fff302daa40, event=0x7fff302da450) at kernel/qapplication_x11.cpp:3646
#53 0x000000376ca6cbdc in x11EventSourceDispatch (s=0xc33350, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:148
#54 0x00000034a3244acd in g_main_dispatch (context=0xc32000) at gmain.c:2441
#55 g_main_context_dispatch (context=0xc32000) at gmain.c:3011
#56 0x00000034a32452c8 in g_main_context_iterate (context=0xc32000, block=<optimized out>, dispatch=1, self=<optimized out>) at gmain.c:3089
#57 0x00000034a324549c in g_main_context_iteration (context=0xc32000, may_block=1) at gmain.c:3152
#58 0x000000376c3a85bf in QEventDispatcherGlib::processEvents (this=0xbfaa70, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#59 0x000000376ca6c8ce in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:207
#60 0x000000376c378a12 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#61 0x000000376c378c67 in QEventLoop::exec (this=0x7fff302da820, flags=...) at kernel/qeventloop.cpp:204
#62 0x000000376c37d665 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#63 0x000000000040a399 in ?? ()
#64 0x00000034a122169d in __libc_start_main (main=0x404cd0, argc=1, ubp_av=0x7fff302dc8f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff302dc8e8) at libc-start.c:226
#65 0x000000000040aaf1 in _start ()

Reported using DrKonqi