Application: konqueror (4.14.13)
KDE Platform Version: 4.14.14
Qt Version: 4.8.7
Operating System: Linux 4.3.0-1-amd64 x86_64
Distribution: Debian GNU/Linux unstable (sid)

-- Information about the crash:
- What I was doing when the application crashed:

I opened konqueror from krunner. Iit restored a previously saved session. I always kill konqueror so session is saved. The session is quite big with a ~15 tabs window and another singled tab window.
After the session was successfully restored konqueror "idled"* in the background for some minutes and it crashed.
* I say idled but it actually takes some CPU as some opened webs require javascript running in background
I have had some other similar crashed also related with autosave but unfortunately I'm unable to explain how they are reproduced.

-- Backtrace:
Application: Konqueror (konqueror), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f92a7262900 (LWP 7333))]

Thread 6 (Thread 0x7f9285604700 (LWP 7735)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f928af18a4d in WTF::TCMalloc_PageHeap::scavengerThread (this=0x7f928b9a3514 <WTF::pageheap_memory+57556>) at /build/qtwebkit-B2cRei/qtwebkit-2.3.4.dfsg/Source/WTF/wtf/FastMalloc.cpp:2575
#2  0x00007f928af18aa9 in WTF::TCMalloc_PageHeap::runScavengerThread (context=0x7f928b9a3514 <WTF::pageheap_memory+57556>) at /build/qtwebkit-B2cRei/qtwebkit-2.3.4.dfsg/Source/WTF/wtf/FastMalloc.cpp:1771
#3  0x00007f929fde6284 in start_thread (arg=0x7f9285604700) at pthread_create.c:333
#4  0x00007f92a6b8774d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f9244602700 (LWP 7757)):
#0  0x00007f92a6b7e86d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f929f70c1cc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f929f70c2dc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f92a45b93a6 in QEventDispatcherGlib::processEvents (this=0x7f923c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#4  0x00007f92a45872e1 in QEventLoop::processEvents (this=this@entry=0x7f9244601cd0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f92a4587655 in QEventLoop::exec (this=this@entry=0x7f9244601cd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f92a4476559 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:538
#7  0x00007f92a4478e4c in QThreadPrivate::start (arg=0x1be0d70) at thread/qthread_unix.cpp:352
#8  0x00007f929fde6284 in start_thread (arg=0x7f9244602700) at pthread_create.c:333
#9  0x00007f92a6b8774d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f92430ac700 (LWP 7787)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1  0x00007f92a4479394 in QWaitConditionPrivate::wait (time=30000, this=0x1e77be0) at thread/qwaitcondition_unix.cpp:84
#2  QWaitCondition::wait (this=this@entry=0x1f04f00, mutex=mutex@entry=0x1e86848, time=30000) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f92a446bff7 in QThreadPoolThread::run (this=0x1f04ef0) at concurrent/qthreadpool.cpp:142
#4  0x00007f92a4478e4c in QThreadPrivate::start (arg=0x1f04ef0) at thread/qthread_unix.cpp:352
#5  0x00007f929fde6284 in start_thread (arg=0x7f92430ac700) at pthread_create.c:333
#6  0x00007f92a6b8774d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f924246e700 (LWP 7801)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f928ac3c191 in JSC::BlockAllocator::blockFreeingThreadMain (this=0x7f9284d73398) at /build/qtwebkit-B2cRei/qtwebkit-2.3.4.dfsg/Source/JavaScriptCore/heap/BlockAllocator.cpp:128
#2  0x00007f928af48fe6 in WTF::wtfThreadEntryPoint (param=0x1fa8be0) at /build/qtwebkit-B2cRei/qtwebkit-2.3.4.dfsg/Source/WTF/wtf/ThreadingPthreads.cpp:196
#3  0x00007f929fde6284 in start_thread (arg=0x7f924246e700) at pthread_create.c:333
#4  0x00007f92a6b8774d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f9241532700 (LWP 7826)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1  0x00007f92a4479394 in QWaitConditionPrivate::wait (time=30000, this=0x1e6d5d0) at thread/qwaitcondition_unix.cpp:84
#2  QWaitCondition::wait (this=this@entry=0x1e79430, mutex=mutex@entry=0x1e86848, time=30000) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f92a446bff7 in QThreadPoolThread::run (this=0x1e79420) at concurrent/qthreadpool.cpp:142
#4  0x00007f92a4478e4c in QThreadPrivate::start (arg=0x1e79420) at thread/qthread_unix.cpp:352
#5  0x00007f929fde6284 in start_thread (arg=0x7f9241532700) at pthread_create.c:333
#6  0x00007f92a6b8774d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f92a7262900 (LWP 7333)):
[KCrash Handler]
#6  0x00007f92922ddb2c in QPointer<KHTMLView>::operator-> (this=<optimized out>) at /usr/include/qt4/QtCore/qpointer.h:74
#7  KHTMLPart::saveState (this=0x139c6f10, stream=...) at ../../khtml/khtml_part.cpp:5403
#8  0x00007f92922ddf93 in KHTMLPart::saveState (this=<optimized out>, stream=...) at ../../khtml/khtml_part.cpp:5467
#9  0x00007f92a6e88efe in KonqView::updateHistoryEntry (this=this@entry=0x2468980, saveLocationBarURL=saveLocationBarURL@entry=true) at ../../../konqueror/src/konqview.cpp:751
#10 0x00007f92a6e8a27d in KonqView::saveConfig (this=0x2468980, config=..., prefix=..., options=...) at ../../../konqueror/src/konqview.cpp:1348
#11 0x00007f92a6e9b9f4 in KonqFrame::saveConfig (this=0x243e040, config=..., prefix=..., options=..., docContainer=0x16c3300) at ../../../konqueror/src/konqframe.cpp:116
#12 0x00007f92a6ea49d1 in KonqFrameTabs::saveConfig (this=0x16c32d0, config=..., prefix=..., options=..., docContainer=0x16c3300, id=0, depth=1) at ../../../konqueror/src/konqtabs.cpp:162
#13 0x00007f92a6e8dbc2 in KonqViewManager::saveViewProfileToGroup (this=0x16041c0, profileGroup=..., options=...) at ../../../konqueror/src/konqviewmanager.cpp:899
#14 0x00007f92a6eba753 in KonqMainWindow::saveProperties (this=<optimized out>, config=...) at ../../../konqueror/src/konqmainwindow.cpp:4908
#15 0x00007f92a6ef7811 in KonqSessionManager::saveCurrentSessionToFile (this=this@entry=0xe42ba0, config=0xfecf10) at ../../../konqueror/src/konqsessionmanager.cpp:489
#16 0x00007f92a6ef7a08 in KonqSessionManager::autoSaveSession (this=0xe42ba0) at ../../../konqueror/src/konqsessionmanager.cpp:448
#17 0x00007f92a6efbf9b in KonqSessionManager::autoSaveSession (this=<optimized out>) at ../../../konqueror/src/konqsessionmanager.cpp:441
#18 KonqSessionManager::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=<optimized out>, _c=<optimized out>) at ./konqsessionmanager.moc:137
#19 0x00007f92a459d160 in QMetaObject::activate (sender=0xe42bb0, m=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3567
#20 0x00007f92a45a2dd3 in QObject::event (this=0xe42bb0, e=<optimized out>) at kernel/qobject.cpp:1253
#21 0x00007f92a364e8dc in QApplicationPrivate::notify_helper (this=this@entry=0xd1b8d0, receiver=receiver@entry=0xe42bb0, e=e@entry=0x7ffd1fd0ef20) at kernel/qapplication.cpp:4570
#22 0x00007f92a3655816 in QApplication::notify (this=this@entry=0x7ffd1fd0f370, receiver=receiver@entry=0xe42bb0, e=e@entry=0x7ffd1fd0ef20) at kernel/qapplication.cpp:4356
#23 0x00007f92a503f71a in KApplication::notify (this=0x7ffd1fd0f370, receiver=0xe42bb0, event=0x7ffd1fd0ef20) at ../../kdeui/kernel/kapplication.cpp:311
#24 0x00007f92a4588a6d in QCoreApplication::notifyInternal (this=0x7ffd1fd0f370, receiver=0xe42bb0, event=event@entry=0x7ffd1fd0ef20) at kernel/qcoreapplication.cpp:955
#25 0x00007f92a45bb830 in QCoreApplication::sendEvent (event=0x7ffd1fd0ef20, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#26 QTimerInfoList::activateTimers (this=0xd0cf50) at kernel/qeventdispatcher_unix.cpp:621
#27 0x00007f92a45b8a31 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:186
#28 0x00007f929f70bfd7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007f929f70c230 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007f929f70c2dc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007f92a45b9384 in QEventDispatcherGlib::processEvents (this=0xcd4cf0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#32 0x00007f92a36f8a76 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#33 0x00007f92a45872e1 in QEventLoop::processEvents (this=this@entry=0x7ffd1fd0f1a0, flags=...) at kernel/qeventloop.cpp:149
#34 0x00007f92a4587655 in QEventLoop::exec (this=this@entry=0x7ffd1fd0f1a0, flags=...) at kernel/qeventloop.cpp:204
#35 0x00007f92a458d629 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1227
#36 0x00007f92a364d06c in QApplication::exec () at kernel/qapplication.cpp:3828
#37 0x00007f92a6f0648f in kdemain (argc=<optimized out>, argv=<optimized out>) at ../../../konqueror/src/konqmain.cpp:227
#38 0x00007f92a6abf870 in __libc_start_main (main=0x4006d0 <main(int, char**)>, argc=2, argv=0x7ffd1fd0f518, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd1fd0f508) at libc-start.c:291
#39 0x0000000000400709 in _start () at ../sysdeps/x86_64/start.S:118

Reported using DrKonqi