Application: rekonq (2.4.2)
KDE Platform Version: 4.12.3
Qt Version: 4.8.6
Operating System: Linux 3.13.0-16-generic x86_64
Distribution: Ubuntu Trusty Tahr (development branch)

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

- Unusual behavior I noticed:
Rekonq has been crashing a lot lately.  Crashes every time after reboot and then randomly while using.

-- Backtrace:
Application: rekonq (rekonq), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb9e621f800 (LWP 11202))]

Thread 6 (Thread 0x7fb9ccddd700 (LWP 11203)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb9e4e2a3bd in WTF::TCMalloc_PageHeap::scavengerThread() () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007fb9e4e2a3f9 in WTF::TCMalloc_PageHeap::runScavengerThread(void*) () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007fb9dc3f3182 in start_thread (arg=0x7fb9ccddd700) at pthread_create.c:312
#4  0x00007fb9e5a1812d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7fb986b55700 (LWP 11205)):
#0  0x00007fb9e59e9057 in sched_yield () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fb9e4b6ace5 in JSC::BlockAllocator::blockFreeingThreadMain() () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007fb9e4e59c76 in WTF::wtfThreadEntryPoint(void*) () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007fb9dc3f3182 in start_thread (arg=0x7fb986b55700) at pthread_create.c:312
#4  0x00007fb9e5a1812d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7fb9853ea700 (LWP 11207)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb9e43110cb in WebCore::IconDatabase::syncThreadMainLoop() () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007fb9e43112b4 in WebCore::IconDatabase::iconDatabaseSyncThread() () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007fb9e4e59c76 in WTF::wtfThreadEntryPoint(void*) () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#4  0x00007fb9dc3f3182 in start_thread (arg=0x7fb9853ea700) at pthread_create.c:312
#5  0x00007fb9e5a1812d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7fb984ac2700 (LWP 11208)):
#0  0x00007fb9e5a094dd in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fb9d7e11e41 in ?? () from /usr/lib/nvidia-331/tls/libnvidia-tls.so.331.38
#2  0x00007fb9dd1b8c00 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb9dd177b14 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb9dd177f7b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb9dd1780ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fb9dfa197be in QEventDispatcherGlib::processEvents (this=0x7fb9700008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#7  0x00007fb9df9eb0af in QEventLoop::processEvents (this=this@entry=0x7fb984ac1de0, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007fb9df9eb3a5 in QEventLoop::exec (this=this@entry=0x7fb984ac1de0, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007fb9df8e7c5f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:537
#10 0x00007fb9df8ea32f in QThreadPrivate::start (arg=0x896200) at thread/qthread_unix.cpp:349
#11 0x00007fb9dc3f3182 in start_thread (arg=0x7fb984ac2700) at pthread_create.c:312
#12 0x00007fb9e5a1812d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7fb97703a700 (LWP 11210)):
#0  0x00007fb9e5a0addd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fb9dd177fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb9dd1780ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb9dfa197be in QEventDispatcherGlib::processEvents (this=0x7fb96c0008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#4  0x00007fb9df9eb0af in QEventLoop::processEvents (this=this@entry=0x7fb977039da0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fb9df9eb3a5 in QEventLoop::exec (this=this@entry=0x7fb977039da0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fb9df8e7c5f in QThread::exec (this=this@entry=0xb10850) at thread/qthread.cpp:537
#7  0x00007fb9df9cc823 in QInotifyFileSystemWatcherEngine::run (this=0xb10850) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007fb9df8ea32f in QThreadPrivate::start (arg=0xb10850) at thread/qthread_unix.cpp:349
#9  0x00007fb9dc3f3182 in start_thread (arg=0x7fb97703a700) at pthread_create.c:312
#10 0x00007fb9e5a1812d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7fb9e621f800 (LWP 11202)):
[KCrash Handler]
#6  0x00007fb9e4b7969d in JSC::BlockAllocator::tryAllocateFromRegion(JSC::BlockAllocator::RegionSet&, WTF::DoublyLinkedList<JSC::Region>&, unsigned long&) () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#7  0x00007fb9e4d91815 in JSC::JSObject::visitChildren(JSC::JSCell*, JSC::SlotVisitor&) () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#8  0x00007fb9e4b7cf0f in JSC::SlotVisitor::drain() () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#9  0x00007fb9e4b6c9ee in JSC::Heap::markRoots(bool) () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#10 0x00007fb9e4b719a5 in JSC::Heap::collect(JSC::Heap::SweepToggle) () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#11 0x00007fb9e4d60202 in JSC::DefaultGCActivityCallback::doWork() () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#12 0x00007fb9e4b74cdc in JSC::HeapTimer::timerEvent(QTimerEvent*) () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#13 0x00007fb9dfa04a31 in QObject::event (this=0x7fb9cc4ebc40, e=<optimized out>) at kernel/qobject.cpp:1156
#14 0x00007fb9e0659e2c in QApplicationPrivate::notify_helper (this=this@entry=0x6a4310, receiver=receiver@entry=0x7fb9cc4ebc40, e=e@entry=0x7fff2e536ef0) at kernel/qapplication.cpp:4567
#15 0x00007fb9e06604a0 in QApplication::notify (this=this@entry=0x7fff2e537290, receiver=receiver@entry=0x7fb9cc4ebc40, e=e@entry=0x7fff2e536ef0) at kernel/qapplication.cpp:4353
#16 0x00007fb9e2f3ab9a in KApplication::notify (this=0x7fff2e537290, receiver=0x7fb9cc4ebc40, event=0x7fff2e536ef0) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007fb9df9ec4dd in QCoreApplication::notifyInternal (this=0x7fff2e537290, receiver=0x7fb9cc4ebc40, event=0x7fff2e536ef0) at kernel/qcoreapplication.cpp:953
#18 0x00007fb9dfa1c323 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#19 QTimerInfoList::activateTimers (this=0x6a3640) at kernel/qeventdispatcher_unix.cpp:621
#20 0x00007fb9dfa19629 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:193
#21 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:240
#22 0x00007fb9dd177e04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007fb9dd178048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fb9dd1780ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fb9dfa197a1 in QEventDispatcherGlib::processEvents (this=0x69ce10, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#26 0x00007fb9e06fbbb6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007fb9df9eb0af in QEventLoop::processEvents (this=this@entry=0x7fff2e537160, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007fb9df9eb3a5 in QEventLoop::exec (this=this@entry=0x7fff2e537160, flags=...) at kernel/qeventloop.cpp:204
#29 0x00007fb9df9f0b79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#30 0x00007fb9e065837c in QApplication::exec () at kernel/qapplication.cpp:3828
#31 0x00007fb9e5dfe155 in kdemain (argc=1, argv=0x7fff2e5373e8) at /build/buildd/rekonq-2.4.2/src/main.cpp:242
#32 0x00007fb9e593eec5 in __libc_start_main (main=0x4006d0 <main(int, char**)>, argc=1, argv=0x7fff2e5373e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff2e5373d8) at libc-start.c:285
#33 0x00000000004006fe in _start ()

Reported using DrKonqi