Application: rekonq (2.2.1)
KDE Platform Version: 4.10.2
Qt Version: 4.8.4
Operating System: Linux 3.8.0-19-generic i686
Distribution: Ubuntu 13.04

-- Information about the crash:
I have been seeing this bug for maybe as long as two weeks.  Today I was fully up to date on 13.04 updates. I started Konq and went into it's and called up the site www.engadget.com and just started scrolling up and down, (lather rinse, repeat!) using nothing more then up up & down arrow key, and in short order Konq will crash with the attached error and JSC failure

I will be happy to test any proposed fix.

The crash can be reproduced every time.

-- Backtrace:
Application: rekonq (rekonq), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xb237d980 (LWP 2992))]

Thread 7 (Thread 0xafdb0b40 (LWP 2993)):
#0  0xb7778424 in __kernel_vsyscall ()
#1  0xb2d1884b in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:187
#2  0xb7563d7c in __pthread_cond_wait (cond=0xb7457d70 <WTF::pageheap_memory+20720>, mutex=0xb7457d58 <WTF::pageheap_memory+20696>) at forward.c:149
#3  0xb6b96ae5 in WTF::TCMalloc_PageHeap::scavengerThread() () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#4  0xb6b96b1f in WTF::TCMalloc_PageHeap::runScavengerThread(void*) () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#5  0xb2d14d78 in start_thread (arg=0xafdb0b40) at pthread_create.c:311
#6  0xb75563de in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:131

Thread 6 (Thread 0xaf48fb40 (LWP 2994)):
#0  0xb7778424 in __kernel_vsyscall ()
#1  0xb2d1884b in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:187
#2  0xb7563d7c in __pthread_cond_wait (cond=0xaf5007dc, mutex=0xaf5007c4) at forward.c:149
#3  0xb6bc7f63 in WTF::ThreadCondition::wait(WTF::Mutex&) () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#4  0xb68a6b1b in JSC::BlockAllocator::blockFreeingThreadMain() () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#5  0xb6bac982 in WTF::threadEntryPoint(void*) () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#6  0xb6bc7b12 in WTF::wtfThreadEntryPoint(void*) () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#7  0xb2d14d78 in start_thread (arg=0xaf48fb40) at pthread_create.c:311
#8  0xb75563de in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:131

Thread 5 (Thread 0xae075b40 (LWP 2995)):
#0  0xb7778424 in __kernel_vsyscall ()
#1  0xb7546dcb in poll () at ../sysdeps/unix/syscall-template.S:81
#2  0xb2fc22db in poll (__timeout=3440, __nfds=1, __fds=0xad702160) at /usr/include/i386-linux-gnu/bits/poll2.h:46
#3  g_poll (fds=0xad702160, nfds=1, timeout=3440) at /build/buildd/glib2.0-2.36.0/./glib/gpoll.c:132
#4  0xb2fb36d0 in g_main_context_poll (n_fds=1, fds=0xad702160, timeout=<optimized out>, context=0xad7004e0, priority=<optimized out>) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3995
#5  g_main_context_iterate (context=context@entry=0xad7004e0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3696
#6  0xb2fb3831 in g_main_context_iteration (context=0xad7004e0, may_block=1) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3762
#7  0xb37f3c3f in QEventDispatcherGlib::processEvents (this=0xad700468, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#8  0xb37c03ec in QEventLoop::processEvents (this=this@entry=0xae075258, flags=...) at kernel/qeventloop.cpp:149
#9  0xb37c06e1 in QEventLoop::exec (this=this@entry=0xae075258, flags=...) at kernel/qeventloop.cpp:204
#10 0xb36abfec in QThread::exec (this=this@entry=0x9cfcc10) at thread/qthread.cpp:542
#11 0xb36ac14b in QThread::run (this=0x9cfcc10) at thread/qthread.cpp:609
#12 0xb36aeb18 in QThreadPrivate::start (arg=0x9cfcc10) at thread/qthread_unix.cpp:338
#13 0xb2d14d78 in start_thread (arg=0xae075b40) at pthread_create.c:311
#14 0xb75563de in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:131

Thread 4 (Thread 0xad399b40 (LWP 2997)):
#0  0xb2fb07e0 in g_source_iter_next (iter=iter@entry=0xad399090, source=source@entry=0xad399088) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:911
#1  0xb2fb2cad in g_main_context_prepare (context=context@entry=0xaca004e0, priority=priority@entry=0xad3990f8) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3306
#2  0xb2fb35cf in g_main_context_iterate (context=context@entry=0xaca004e0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3681
#3  0xb2fb3831 in g_main_context_iteration (context=0xaca004e0, may_block=1) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3762
#4  0xb37f3c3f in QEventDispatcherGlib::processEvents (this=0xaca00468, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0xb37c03ec in QEventLoop::processEvents (this=this@entry=0xad399228, flags=...) at kernel/qeventloop.cpp:149
#6  0xb37c06e1 in QEventLoop::exec (this=this@entry=0xad399228, flags=...) at kernel/qeventloop.cpp:204
#7  0xb36abfec in QThread::exec (this=this@entry=0xa35cf68) at thread/qthread.cpp:542
#8  0xb379ff2d in QInotifyFileSystemWatcherEngine::run (this=0xa35cf68) at io/qfilesystemwatcher_inotify.cpp:256
#9  0xb36aeb18 in QThreadPrivate::start (arg=0xa35cf68) at thread/qthread_unix.cpp:338
#10 0xb2d14d78 in start_thread (arg=0xad399b40) at pthread_create.c:311
#11 0xb75563de in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:131

Thread 3 (Thread 0x9fc39b40 (LWP 3061)):
#0  g_mutex_get_impl (mutex=0xe07e038) at /build/buildd/glib2.0-2.36.0/./glib/gthread-posix.c:123
#1  0xb2ff6d68 in g_mutex_unlock (mutex=mutex@entry=0xe07e038) at /build/buildd/glib2.0-2.36.0/./glib/gthread-posix.c:229
#2  0xb2fb35bf in g_main_context_iterate (context=context@entry=0xe07e038, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3679
#3  0xb2fb3831 in g_main_context_iteration (context=0xe07e038, may_block=may_block@entry=1) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3762
#4  0xb2fb38be in glib_worker_main (data=0x0) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:5427
#5  0xb2fd8fc3 in g_thread_proxy (data=0xa445a30) at /build/buildd/glib2.0-2.36.0/./glib/gthread.c:798
#6  0xb2d14d78 in start_thread (arg=0x9fc39b40) at pthread_create.c:311
#7  0xb75563de in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:131

Thread 2 (Thread 0x9f3d0b40 (LWP 3063)):
#0  0xb2d16de3 in __GI___pthread_mutex_lock (mutex=0xe08b090) at pthread_mutex_lock.c:95
#1  0xb7563f84 in pthread_mutex_lock (mutex=0xe08b090) at forward.c:192
#2  0xb2ff6d30 in g_mutex_lock (mutex=mutex@entry=0xe08b018) at /build/buildd/glib2.0-2.36.0/./glib/gthread-posix.c:210
#3  0xb2fb3026 in g_main_context_check (context=context@entry=0xe08b018, max_priority=2147483647, fds=fds@entry=0xad70dd38, n_fds=n_fds@entry=3) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3491
#4  0xb2fb3662 in g_main_context_iterate (context=0xe08b018, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3698
#5  0xb2fb3c2b in g_main_loop_run (loop=0xe08afe0) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3895
#6  0xa81aabca in gdbus_shared_thread_func (user_data=0xe08b000) at /build/buildd/glib2.0-2.36.0/./gio/gdbusprivate.c:278
#7  0xb2fd8fc3 in g_thread_proxy (data=0xe08a200) at /build/buildd/glib2.0-2.36.0/./glib/gthread.c:798
#8  0xb2d14d78 in start_thread (arg=0x9f3d0b40) at pthread_create.c:311
#9  0xb75563de in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:131

Thread 1 (Thread 0xb237d980 (LWP 2992)):
[KCrash Handler]
#7  0xa29429b3 in ?? ()
#8  0xb6991261 in JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#9  0xb6a92f5e in JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#10 0xb5529563 in WebCore::JSEventListener::handleEvent(WebCore::ScriptExecutionContext*, WebCore::Event*) () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#11 0xb57650b2 in WebCore::EventTarget::fireEventListeners(WebCore::Event*, WebCore::EventTargetData*, WTF::Vector<WebCore::RegisteredEventListener, 1u>&) () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#12 0xb5765360 in WebCore::EventTarget::fireEventListeners(WebCore::Event*) () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#13 0xb57c25de in WebCore::WindowEventContext::handleLocalEvents(WebCore::Event*) () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#14 0xb575ddea in WebCore::EventDispatcher::dispatchEvent(WTF::PassRefPtr<WebCore::Event>) () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#15 0xb575ae47 in WebCore::EventDispatchMediator::dispatchEvent(WebCore::EventDispatcher*) const () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#16 0xb575c1d7 in WebCore::EventDispatcher::dispatchEvent(WebCore::Node*, WTF::PassRefPtr<WebCore::EventDispatchMediator>) () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#17 0xb577fe37 in WebCore::Node::dispatchEvent(WTF::PassRefPtr<WebCore::Event>) () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#18 0xb57341ee in WebCore::DocumentEventQueue::dispatchEvent(WTF::PassRefPtr<WebCore::Event>) () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#19 0xb57355cd in WebCore::DocumentEventQueue::pendingEventTimerFired() () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#20 0xb5ca9803 in WebCore::ThreadTimers::sharedTimerFiredInternal() () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#21 0xb5ca9885 in WebCore::ThreadTimers::sharedTimerFired() () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#22 0xb5f2935e in WebCore::SharedTimerQt::timerEvent(QTimerEvent*) () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#23 0xb37dd2d4 in QObject::event (this=0x9cf74c8, e=0xbf8959c0) at kernel/qobject.cpp:1156
#24 0xb3d34c7c in QApplicationPrivate::notify_helper (this=0x9bca140, receiver=0x9cf74c8, e=0xbf8959c0) at kernel/qapplication.cpp:4567
#25 0xb3d37b94 in QApplication::notify (this=0xbf8959c0, receiver=0x9cf74c8, e=0xbf8959c0) at kernel/qapplication.cpp:3949
#26 0xb503fd01 in KApplication::notify (this=0xbf895cf8, receiver=0x9cf74c8, event=0xbf8959c0) at ../../kdeui/kernel/kapplication.cpp:311
#27 0xb37c190e in QCoreApplication::notifyInternal (this=0xbf895cf8, receiver=0x9cf74c8, event=event@entry=0xbf8959c0) at kernel/qcoreapplication.cpp:946
#28 0xb37f68c0 in sendEvent (event=0xbf8959c0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#29 QTimerInfoList::activateTimers (this=this@entry=0x9bca5ac) at kernel/qeventdispatcher_unix.cpp:622
#30 0xb37f35a8 in timerSourceDispatch (source=0x9bca578) at kernel/qeventdispatcher_glib.cpp:186
#31 timerSourceDispatch (source=source@entry=0x9bca578) at kernel/qeventdispatcher_glib.cpp:180
#32 0xb2fb33b3 in g_main_dispatch (context=0x9bca4a8, context@entry=0x9b9c6b8) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3054
#33 g_main_context_dispatch (context=context@entry=0x9bca4a8) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3630
#34 0xb2fb3750 in g_main_context_iterate (context=context@entry=0x9bca4a8, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3701
#35 0xb2fb3831 in g_main_context_iteration (context=0x9bca4a8, may_block=1) at /build/buildd/glib2.0-2.36.0/./glib/gmain.c:3762
#36 0xb37f3c21 in QEventDispatcherGlib::processEvents (this=this@entry=0x9b96ed8, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#37 0xb3deba5a in QGuiEventDispatcherGlib::processEvents (this=0x9b96ed8, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#38 0xb37c03ec in QEventLoop::processEvents (this=this@entry=0xbf895c28, flags=...) at kernel/qeventloop.cpp:149
#39 0xb37c06e1 in QEventLoop::exec (this=this@entry=0xbf895c28, flags=...) at kernel/qeventloop.cpp:204
#40 0xb37c63fa in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#41 0xb3d32fc4 in QApplication::exec () at kernel/qapplication.cpp:3828
#42 0xb7736725 in kdemain (argc=1, argv=0xbf895de4) at /build/buildd/rekonq-2.2.1/src/main.cpp:240
#43 0x0804854b in main (argc=1, argv=0xbf895de4) at /build/buildd/rekonq-2.2.1/obj-i686-linux-gnu/src/rekonq_dummy.cpp:3

Possible duplicates by query: bug 316501, bug 313824, bug 310847, bug 310315, bug 306197.

Reported using DrKonqi