Application: kdevelop (4.6.0)
KDE Platform Version: 4.12.5
Qt Version: 4.8.6
Operating System: Linux 3.14.4-200.fc20.x86_64 x86_64
Distribution: "Fedora release 20 (Heisenbug)"

-- Information about the crash:
In the filesystems tool I clicked on a file with a .osm extention. That is an xml file 82,672 lines long.  Now kdevelop crashes with
:
[RB@localhost ~]$ kdevelop
WARNING: deleting stale lockfile /home/RB/.kde/share/apps/kdevelop/sessions/{28e633ce-10de-46c6-9be7-bcb918c0deb2}/lock
kdevelop(15347)/kdevplatform (language) KDevelop::ItemRepositoryRegistryPrivate::open: version-hint not found, seems to be an old version 
kdevelop(15347)/kdevplatform (language) KDevelop::ItemRepositoryRegistryPrivate::open: "The data-repository at /home/RB/.cache/kdevduchain/kdevelop-{28e633ce-10de-46c6-9be7-bcb918c0deb2} has to be cleared." 
loaded the Generic plugin 
kdevelop(15347) KXMLGUIClient::setXMLFile: cannot find .rc file "marble_part.rc" for component "kdevelop" 
KCrash: Application 'kdevelop' crashing...
KCrash: Attempting to start /usr/libexec/kde4/drkonqi from kdeinit
sock_file=/home/RB/.kde/socket-localhost.localdomain/kdeinit4__0

[1]+  Stopped                 kdevelop
[RB@localhost ~]$ QSocketNotifier: Invalid socket 26 and type 'Read', disabling...
QSocketNotifier: Invalid socket 20 and type 'Read', disabling...

The crash can be reproduced every time.

-- Backtrace:
Application: KDevelop (kdevelop), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f1fcc5d78c0 (LWP 15347))]

Thread 9 (Thread 0x7f1fc10f5700 (LWP 15348)):
#0  0x0000003eed20bd20 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x000000357478ef2b in QTWTF::TCMalloc_PageHeap::scavengerThread() () from /lib64/libQtScript.so.4
#2  0x000000357478ef69 in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*) () from /lib64/libQtScript.so.4
#3  0x0000003eed207f33 in start_thread () from /lib64/libpthread.so.0
#4  0x0000003eecef4ded in clone () from /lib64/libc.so.6

Thread 8 (Thread 0x7f1f3fe50700 (LWP 15349)):
#0  0x0000003eed20c0c9 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x000000356807cbd4 in QWaitCondition::wait(QMutex*, unsigned long) () from /lib64/libQtCore.so.4
#2  0x00000035724b4a42 in KDevelop::DUChainPrivate::CleanupThread::run() () from /lib64/libkdevplatformlanguage.so.7
#3  0x000000356807c6bf in QThreadPrivate::start(void*) () from /lib64/libQtCore.so.4
#4  0x0000003eed207f33 in start_thread () from /lib64/libpthread.so.0
#5  0x0000003eecef4ded in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7f1f31337700 (LWP 15350)):
#0  0x0000003eed20a050 in pthread_mutex_lock () from /lib64/libpthread.so.0
#1  0x0000003eef68a5a1 in g_mutex_lock () from /lib64/libglib-2.0.so.0
#2  0x0000003eef648deb in g_main_context_query () from /lib64/libglib-2.0.so.0
#3  0x0000003eef64950a in g_main_context_iterate.isra.24 () from /lib64/libglib-2.0.so.0
#4  0x0000003eef6496dc in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#5  0x00000035681b5a7e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#6  0x000000356818595f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#7  0x0000003568185cad in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#8  0x0000003568079e8f in QThread::exec() () from /lib64/libQtCore.so.4
#9  0x000000356807c6bf in QThreadPrivate::start(void*) () from /lib64/libQtCore.so.4
#10 0x0000003eed207f33 in start_thread () from /lib64/libpthread.so.0
#11 0x0000003eecef4ded in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7f1f29b81700 (LWP 15353)):
#0  0x0000003eeceea9dd in poll () from /lib64/libc.so.6
#1  0x0000003eef6495b4 in g_main_context_iterate.isra.24 () from /lib64/libglib-2.0.so.0
#2  0x0000003eef6496dc in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#3  0x00000035681b5a7e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#4  0x000000356818595f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#5  0x0000003568185cad in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#6  0x0000003568079e8f in QThread::exec() () from /lib64/libQtCore.so.4
#7  0x000000356807c6bf in QThreadPrivate::start(void*) () from /lib64/libQtCore.so.4
#8  0x0000003eed207f33 in start_thread () from /lib64/libpthread.so.0
#9  0x0000003eecef4ded in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7f1f29380700 (LWP 15354)):
#0  0x0000003eed20e87d in read () from /lib64/libpthread.so.0
#1  0x0000003eef6897b0 in g_wakeup_acknowledge () from /lib64/libglib-2.0.so.0
#2  0x0000003eef64909c in g_main_context_check () from /lib64/libglib-2.0.so.0
#3  0x0000003eef649533 in g_main_context_iterate.isra.24 () from /lib64/libglib-2.0.so.0
#4  0x0000003eef6496dc in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#5  0x00000035681b5a7e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#6  0x000000356818595f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#7  0x0000003568185cad in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#8  0x0000003568079e8f in QThread::exec() () from /lib64/libQtCore.so.4
#9  0x000000356807c6bf in QThreadPrivate::start(void*) () from /lib64/libQtCore.so.4
#10 0x0000003eed207f33 in start_thread () from /lib64/libpthread.so.0
#11 0x0000003eecef4ded in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f1f1eb3e700 (LWP 15359)):
#0  0x0000003eed20e87d in read () from /lib64/libpthread.so.0
#1  0x0000003eef6897b0 in g_wakeup_acknowledge () from /lib64/libglib-2.0.so.0
#2  0x0000003eef64909c in g_main_context_check () from /lib64/libglib-2.0.so.0
#3  0x0000003eef649533 in g_main_context_iterate.isra.24 () from /lib64/libglib-2.0.so.0
#4  0x0000003eef6496dc in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#5  0x00000035681b5a7e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#6  0x000000356818595f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#7  0x0000003568185cad in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#8  0x0000003568079e8f in QThread::exec() () from /lib64/libQtCore.so.4
#9  0x00000035681662e3 in QInotifyFileSystemWatcherEngine::run() () from /lib64/libQtCore.so.4
#10 0x000000356807c6bf in QThreadPrivate::start(void*) () from /lib64/libQtCore.so.4
#11 0x0000003eed207f33 in start_thread () from /lib64/libpthread.so.0
#12 0x0000003eecef4ded in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f1f12935700 (LWP 15360)):
#0  0x0000003eef648b80 in g_main_context_prepare () from /lib64/libglib-2.0.so.0
#1  0x0000003eef6494bb in g_main_context_iterate.isra.24 () from /lib64/libglib-2.0.so.0
#2  0x0000003eef6496dc in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#3  0x00000035681b5a7e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#4  0x000000356818595f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#5  0x0000003568185cad in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQtCore.so.4
#6  0x0000003568079e8f in QThread::exec() () from /lib64/libQtCore.so.4
#7  0x00000035681662e3 in QInotifyFileSystemWatcherEngine::run() () from /lib64/libQtCore.so.4
#8  0x000000356807c6bf in QThreadPrivate::start(void*) () from /lib64/libQtCore.so.4
#9  0x0000003eed207f33 in start_thread () from /lib64/libpthread.so.0
#10 0x0000003eecef4ded in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f1ec967a700 (LWP 15361)):
#0  0x0000003eed20bd20 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00000035798bc1bd in JSC::BlockAllocator::blockFreeingThreadMain() () from /lib64/libQtWebKit.so.4
#2  0x0000003579baea86 in WTF::wtfThreadEntryPoint(void*) () from /lib64/libQtWebKit.so.4
#3  0x0000003eed207f33 in start_thread () from /lib64/libpthread.so.0
#4  0x0000003eecef4ded in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f1fcc5d78c0 (LWP 15347)):
[KCrash Handler]
#5  0x000000356a215995 in QWidget::setUpdatesEnabled(bool) () from /lib64/libQtGui.so.4
#6  0x00007f1f1f29e8a7 in Marble::MarblePart::MarblePart(QWidget*, QObject*, QList<QVariant> const&) () from /usr/lib64/kde4/libmarble_part.so
#7  0x00007f1f1f2a72f1 in QObject* KPluginFactory::createPartInstance<Marble::MarblePart>(QWidget*, QObject*, QList<QVariant> const&) () from /usr/lib64/kde4/libmarble_part.so
#8  0x0000003569c1f383 in KPluginFactory::create(char const*, QWidget*, QObject*, QList<QVariant> const&, QString const&) () from /lib64/libkdecore.so.5
#9  0x000000356fc24bbe in KDevelop::IPartController::createPart(QString const&, QString const&) () from /lib64/libkdevplatforminterfaces.so.7
#10 0x000000357668eeae in KDevelop::PartController::createPart(KUrl const&, QString const&) () from /lib64/libkdevplatformshell.so.7
#11 0x000000357669006d in KDevelop::PartDocument::createViewWidget(QWidget*) () from /lib64/libkdevplatformshell.so.7
#12 0x0000003575a36166 in Sublime::View::widget(QWidget*) () from /lib64/libsublime.so.7
#13 0x0000003575a33575 in Sublime::MainWindowPrivate::ViewCreator::operator()(Sublime::AreaIndex*) () from /lib64/libsublime.so.7
#14 0x0000003575a35aa5 in Sublime::Area::WalkerMode Sublime::Area::walkViewsInternal<Sublime::MainWindowPrivate::ViewCreator>(Sublime::MainWindowPrivate::ViewCreator&, Sublime::AreaIndex*) () from /lib64/libsublime.so.7
#15 0x0000003575a3466b in Sublime::MainWindowPrivate::viewAdded(Sublime::AreaIndex*, Sublime::View*) () from /lib64/libsublime.so.7
#16 0x000000356819b938 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /lib64/libQtCore.so.4
#17 0x0000003575a1ef28 in Sublime::Area::viewAdded(Sublime::AreaIndex*, Sublime::View*) () from /lib64/libsublime.so.7
#18 0x0000003575a20ddf in Sublime::Area::addView(Sublime::View*, Sublime::AreaIndex*, Sublime::View*) () from /lib64/libsublime.so.7
#19 0x000000357665b492 in KDevelop::WorkingSet::loadToArea(Sublime::Area*, Sublime::AreaIndex*, KConfigGroup, KConfigGroup, QMultiMap<QString, Sublime::View*>&) () from /lib64/libkdevplatformshell.so.7
#20 0x000000357665bc63 in KDevelop::WorkingSet::loadToArea(Sublime::Area*, Sublime::AreaIndex*) () from /lib64/libkdevplatformshell.so.7
#21 0x0000003576657dfb in KDevelop::WorkingSetController::changedWorkingSet(Sublime::Area*, QString const&, QString const&) () from /lib64/libkdevplatformshell.so.7
#22 0x000000357665812f in KDevelop::WorkingSetController::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) [clone .part.24] () from /lib64/libkdevplatformshell.so.7
#23 0x000000356819b938 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /lib64/libQtCore.so.4
#24 0x0000003575a1f2fc in Sublime::Area::changedWorkingSet(Sublime::Area*, QString, QString) () from /lib64/libsublime.so.7
#25 0x0000003575a21d35 in Sublime::Area::setWorkingSet(QString) () from /lib64/libsublime.so.7
#26 0x0000003575a2255a in Sublime::Area::load(KConfigGroup const&) () from /lib64/libsublime.so.7
#27 0x0000003576679996 in KDevelop::UiController::loadArea(Sublime::Area*, KConfigGroup const&) () from /lib64/libkdevplatformshell.so.7
#28 0x000000357667cb31 in KDevelop::UiController::loadAllAreas(KSharedPtr<KSharedConfig>) () from /lib64/libkdevplatformshell.so.7
#29 0x00000035766773ee in KDevelop::CorePrivate::initialize(KDevelop::Core::Setup, QString) () from /lib64/libkdevplatformshell.so.7
#30 0x0000003576678614 in KDevelop::Core::initialize(KSplashScreen*, KDevelop::Core::Setup, QString const&) () from /lib64/libkdevplatformshell.so.7
#31 0x000000000040fa8a in main ()

Reported using DrKonqi