Bug 336068

Application: rekonq (2.4.2)
KDE Platform Version: 4.13.0
Qt Version: 4.8.6
Operating System: Linux 3.13.0-29-generic x86_64
Distribution: Ubuntu 14.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:
I was downloading new Aurorae themes. This has been happening quite often tonight. Using Rekonq which is a common theme but circumstances seem to vary, so I cannot tell if they are the same or if this adds new information.

The crash can be reproduced sometimes.

-- 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 0x7f55ca8ba7c0 (LWP 14240))]

Thread 7 (Thread 0x7f55b207f700 (LWP 14241)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f55c94b981d in WTF::TCMalloc_PageHeap::scavengerThread() () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f55c94b9859 in WTF::TCMalloc_PageHeap::runScavengerThread(void*) () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f55c0a58182 in start_thread (arg=0x7f55b207f700) at pthread_create.c:312
#4  0x00007f55ca0ab30d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7f556fc6e700 (LWP 14243)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f55c91fa20d in JSC::BlockAllocator::blockFreeingThreadMain() () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f55c94e8fd6 in WTF::wtfThreadEntryPoint(void*) () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f55c0a58182 in start_thread (arg=0x7f556fc6e700) at pthread_create.c:312
#4  0x00007f55ca0ab30d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7f556e71f700 (LWP 14245)):
#0  0x00007f55ca09dfbd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f55c1720fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f55c17210ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f55c407a7be in QEventDispatcherGlib::processEvents (this=0x7f55640008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#4  0x00007f55c404c0af in QEventLoop::processEvents (this=this@entry=0x7f556e71ee20, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f55c404c3a5 in QEventLoop::exec (this=this@entry=0x7f556e71ee20, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f55c3f48c5f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:537
#7  0x00007f55c3f4b32f in QThreadPrivate::start (arg=0x143dcb0) at thread/qthread_unix.cpp:349
#8  0x00007f55c0a58182 in start_thread (arg=0x7f556e71f700) at pthread_create.c:312
#9  0x00007f55ca0ab30d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7f553889f700 (LWP 14283)):
#0  0x00007f55c176262a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f55c1762989 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f55c1720fca in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f55c172130a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f554c8a6e16 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#5  0x00007f55c1745f15 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f55c0a58182 in start_thread (arg=0x7f553889f700) at pthread_create.c:312
#7  0x00007f55ca0ab30d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f5533fff700 (LWP 14284)):
#0  0x00007f55c16f2360 in pthread_mutex_unlock@plt () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f55c17629c1 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f55c1720bda in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f55c1721048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f55c17210ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f55c1721129 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f55c1745f15 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f55c0a58182 in start_thread (arg=0x7f5533fff700) at pthread_create.c:312
#8  0x00007f55ca0ab30d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f5530eaf700 (LWP 14294)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f55c89a417b in WebCore::IconDatabase::syncThreadMainLoop() () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f55c89a4364 in WebCore::IconDatabase::iconDatabaseSyncThread() () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f55c94e8fd6 in WTF::wtfThreadEntryPoint(void*) () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#4  0x00007f55c0a58182 in start_thread (arg=0x7f5530eaf700) at pthread_create.c:312
#5  0x00007f55ca0ab30d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f55ca8ba7c0 (LWP 14240)):
[KCrash Handler]
#6  ref (this=0x38) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86_64.h:121
#7  QtSharedPointer::ExternalRefCountData::getAndRef (obj=obj@entry=0x1e4a790) at tools/qsharedpointer.cpp:1257
#8  0x00007f55c5a784d3 in QWeakPointer<QObject> (ptr=0x1e4a790, this=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qsharedpointer_impl.h:595
#9  operator=<QObject> (ptr=0x1e4a790, this=0x238a920) at ../../include/QtCore/../../src/corelib/tools/qsharedpointer_impl.h:600
#10 QNetworkRequest::setOriginatingObject (this=0x7ffffba05570, object=0x1e4a790) at access/qnetworkrequest.cpp:565
#11 0x00007f55c893f254 in WebCore::ResourceRequest::toNetworkRequest(WebCore::NetworkingContext*) const () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#12 0x00007f55c8945665 in WebCore::QNetworkReplyHandler::redirect(WebCore::ResourceResponse&, QUrl const&) () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#13 0x00007f55c89464e2 in WebCore::QNetworkReplyHandler::sendResponseIfNeeded() () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#14 0x00007f55c89442cf in WebCore::QNetworkReplyHandlerCallQueue::flush() [clone .part.56] () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#15 0x00007f55c8944c64 in WebCore::QNetworkReplyWrapper::receiveMetaData() () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#16 0x00007f55c406187a in QMetaObject::activate (sender=0x2392fc0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3539
#17 0x00007f55c4055908 in QMetaMethod::invoke (this=this@entry=0x7ffffba05f50, object=object@entry=0x2392fc0, connectionType=Qt::DirectConnection, connectionType@entry=Qt::AutoConnection, returnValue=..., val0=..., val1=..., val2=..., val3=..., val4=..., val5=..., val6=..., val7=..., val8=..., val9=...) at kernel/qmetaobject.cpp:1664
#18 0x00007f55c4057dc2 in QMetaObject::invokeMethod (obj=obj@entry=0x2392fc0, member=member@entry=0x7f55c7113d25 "finished", type=type@entry=Qt::AutoConnection, ret=..., val0=..., val1=..., val2=..., val3=..., val4=..., val5=..., val6=..., val7=..., val8=..., val9=...) at kernel/qmetaobject.cpp:1179
#19 0x00007f55c6fac47c in invokeMethod (val9=..., val8=..., val7=..., val6=..., val5=..., val4=..., val3=..., val2=..., val1=..., val0=..., type=Qt::AutoConnection, member=0x7f55c7113d25 "finished", obj=0x2392fc0) at /usr/include/qt4/QtCore/qobjectdefs.h:418
#20 KDEPrivate::AccessManagerReply::emitFinished (this=this@entry=0x2392fc0, state=state@entry=true, type=type@entry=Qt::AutoConnection) at ../../kio/kio/accessmanagerreply_p.cpp:485
#21 0x00007f55c6fae100 in KDEPrivate::AccessManagerReply::slotResult (this=0x2392fc0, kJob=0x14e7fa0) at ../../kio/kio/accessmanagerreply_p.cpp:427
#22 0x00007f55c406187a in QMetaObject::activate (sender=sender@entry=0x14e7fa0, m=m@entry=0x7f55c4aea600 <KJob::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7ffffba06440) at kernel/qobject.cpp:3539
#23 0x00007f55c475a622 in KJob::result (this=this@entry=0x14e7fa0, _t1=_t1@entry=0x14e7fa0) at ./kjob.moc:207
#24 0x00007f55c475a660 in KJob::emitResult (this=this@entry=0x14e7fa0) at ../../kdecore/jobs/kjob.cpp:318
#25 0x00007f55c6fe839a in KIO::SimpleJob::slotFinished (this=this@entry=0x14e7fa0) at ../../kio/kio/job.cpp:496
#26 0x00007f55c6fe94ee in KIO::TransferJob::slotFinished (this=0x14e7fa0) at ../../kio/kio/job.cpp:1110
#27 0x00007f55c406187a in QMetaObject::activate (sender=0x1e3d710, m=m@entry=0x7f55c7391580 <KIO::SlaveInterface::staticMetaObject>, local_signal_index=local_signal_index@entry=4, argv=argv@entry=0x0) at kernel/qobject.cpp:3539
#28 0x00007f55c7086263 in KIO::SlaveInterface::finished (this=<optimized out>) at ./slaveinterface.moc:184
#29 0x00007f55c70877a6 in KIO::SlaveInterface::dispatch (this=<optimized out>, _cmd=104, rawdata=...) at ../../kio/kio/slaveinterface.cpp:176
#30 0x00007f55c708529e in KIO::SlaveInterface::dispatch (this=0x1e3d710) at ../../kio/kio/slaveinterface.cpp:92
#31 0x00007f55c7079f16 in KIO::Slave::gotInput (this=0x1e3d710) at ../../kio/kio/slave.cpp:344
#32 0x00007f55c406187a in QMetaObject::activate (sender=0x1e304c0, m=m@entry=0x7f55c738aaa0 <KIO::Connection::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3539
#33 0x00007f55c6fb5b40 in KIO::Connection::readyRead (this=<optimized out>) at ./connection.moc:105
#34 0x00007f55c6fb6231 in KIO::ConnectionPrivate::dequeue (this=0x1e831c0) at ../../kio/kio/connection.cpp:82
#35 0x00007f55c4065c1e in QObject::event (this=0x1e304c0, e=<optimized out>) at kernel/qobject.cpp:1194
#36 0x00007f55c4cc9e2c in QApplicationPrivate::notify_helper (this=this@entry=0x1257840, receiver=receiver@entry=0x1e304c0, e=e@entry=0x23133e0) at kernel/qapplication.cpp:4567
#37 0x00007f55c4cd04a0 in QApplication::notify (this=this@entry=0x7ffffba071c0, receiver=receiver@entry=0x1e304c0, e=e@entry=0x23133e0) at kernel/qapplication.cpp:4353
#38 0x00007f55c75c9baa in KApplication::notify (this=0x7ffffba071c0, receiver=0x1e304c0, event=0x23133e0) at ../../kdeui/kernel/kapplication.cpp:311
#39 0x00007f55c404d4dd in QCoreApplication::notifyInternal (this=0x7ffffba071c0, receiver=receiver@entry=0x1e304c0, event=event@entry=0x23133e0) at kernel/qcoreapplication.cpp:953
#40 0x00007f55c4050b3d in sendEvent (event=0x23133e0, receiver=0x1e304c0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#41 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x120a240) at kernel/qcoreapplication.cpp:1577
#42 0x00007f55c4050fe3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#43 0x00007f55c407af83 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#44 postEventSourceDispatch (s=0x1252250) at kernel/qeventdispatcher_glib.cpp:287
#45 0x00007f55c1720e04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#46 0x00007f55c1721048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#47 0x00007f55c17210ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#48 0x00007f55c407a7a1 in QEventDispatcherGlib::processEvents (this=0x120bbc0, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#49 0x00007f55c4d6bbb6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#50 0x00007f55c404c0af in QEventLoop::processEvents (this=this@entry=0x7ffffba07090, flags=...) at kernel/qeventloop.cpp:149
#51 0x00007f55c404c3a5 in QEventLoop::exec (this=this@entry=0x7ffffba07090, flags=...) at kernel/qeventloop.cpp:204
#52 0x00007f55c4051b79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#53 0x00007f55c4cc837c in QApplication::exec () at kernel/qapplication.cpp:3828
#54 0x00007f55ca493155 in kdemain (argc=2, argv=0x7ffffba07318) at /build/buildd/rekonq-2.4.2/src/main.cpp:242
#55 0x00007f55c9fd1ec5 in __libc_start_main (main=0x4006d0 <main(int, char**)>, argc=2, argv=0x7ffffba07318, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffffba07308) at libc-start.c:287
#56 0x00000000004006fe in _start ()

Possible duplicates by query: bug 333940, bug 333783, bug 333633, bug 331792, bug 331598.

Reported using DrKonqi