Version:            (using KDE 4.2.2)
Compiler:          4.3.2 
OS:                Linux
Installed from:    Gentoo Packages

I did a search for some terms, and failed to find an email I wanted.  But then I found kmail (inside kontact, though I doubt that's relevant) to be really slow (I think it kept searching dynamically in the background?), so I went to check the "recent searches" and then got this crash:

Application: Kontact (kontact), signal SIGABRT
0x00007f42a0717c11 in nanosleep () from /lib/libc.so.6
[Current thread is 0 (LWP 6619)]

Thread 4 (Thread 0x423a2950 (LWP 8279)):
#0  0x00007f42a07417a2 in select () from /lib/libc.so.6
#1  0x00007f42a14a1785 in QProcessManager::run () from /usr/lib64/qt4/libQtCore.so.4
#2  0x00007f42a13ec009 in QThreadPrivate::start () from /usr/lib64/qt4/libQtCore.so.4
#3  0x00007f42a117d057 in start_thread () from /lib/libpthread.so.0
#4  0x00007f42a074803d in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x410ad950 (LWP 28615)):
#0  0x00007f42a073f736 in poll () from /lib/libc.so.6
#1  0x00007f4299e5db05 in __libc_res_nsend () from /lib64/libresolv.so.2
#2  0x00007f4299e5c5a4 in __libc_res_nquery () from /lib64/libresolv.so.2
#3  0x00007f4299e5c896 in __libc_res_nquerydomain () from /lib64/libresolv.so.2
#4  0x00007f4299e5ca4f in __libc_res_nsearch () from /lib64/libresolv.so.2
#5  0x00007f428aa135d9 in _nss_dns_gethostbyname3_r () from /lib/libnss_dns.so.2
#6  0x00007f428aa13854 in _nss_dns_gethostbyname2_r () from /lib/libnss_dns.so.2
#7  0x00007f42a0732ea3 in gaih_inet () from /lib/libc.so.6
#8  0x00007f42a0734fb9 in getaddrinfo () from /lib/libc.so.6
#9  0x00007f42a2b731e4 in QHostInfoAgent::fromName () from /usr/lib64/qt4/libQtNetwork.so.4
#10 0x00007f42a2b6ccb5 in QHostInfo::fromName () from /usr/lib64/qt4/libQtNetwork.so.4
#11 0x00007f42a386ef54 in QtConcurrent::StoredFunctorCall1<QHostInfo, QHostInfo (*)(QString const&), QString>::runFunctor () from /usr/kde/4.2/lib64/libkio.so.5
#12 0x00007f42a3870742 in QtConcurrent::RunFunctionTask<QHostInfo>::run () from /usr/kde/4.2/lib64/libkio.so.5
#13 0x00007f42a13e4224 in QThreadPoolThread::run () from /usr/lib64/qt4/libQtCore.so.4
#14 0x00007f42a13ec009 in QThreadPrivate::start () from /usr/lib64/qt4/libQtCore.so.4
#15 0x00007f42a117d057 in start_thread () from /lib/libpthread.so.0
#16 0x00007f42a074803d in clone () from /lib/libc.so.6
#17 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x418ae950 (LWP 28693)):
#0  0x00007f42a118104d in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f42a13ecd17 in QWaitCondition::wait () from /usr/lib64/qt4/libQtCore.so.4
#2  0x00007f42a13e4271 in QThreadPoolThread::run () from /usr/lib64/qt4/libQtCore.so.4
#3  0x00007f42a13ec009 in QThreadPrivate::start () from /usr/lib64/qt4/libQtCore.so.4
#4  0x00007f42a117d057 in start_thread () from /lib/libpthread.so.0
#5  0x00007f42a074803d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f42a722e750 (LWP 6619)):
[KCrash Handler]
#5  0x00007f42a06aa225 in raise () from /lib/libc.so.6
#6  0x00007f42a06ab743 in abort () from /lib/libc.so.6
#7  0x00007f42a13e51e5 in qt_message_output () from /usr/lib64/qt4/libQtCore.so.4
#8  0x00007f42a13e5317 in qFatal () from /usr/lib64/qt4/libQtCore.so.4
#9  0x00007f428f480128 in KMail::MessageListView::StorageModel::slotMessageAdded () from /usr/kde/4.2/lib64/libkmailprivate.so.4
#10 0x00007f428eff62dd in KMail::MessageListView::StorageModel::qt_metacall () from /usr/kde/4.2/lib64/libkmailprivate.so.4
#11 0x00007f42a14ce233 in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#12 0x00007f428f0f1d20 in KMFolder::msgAdded () from /usr/kde/4.2/lib64/libkmailprivate.so.4
#13 0x00007f428f0f271c in KMFolder::qt_metacall () from /usr/kde/4.2/lib64/libkmailprivate.so.4
#14 0x00007f42a14ce233 in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#15 0x00007f428f124185 in FolderStorage::emitMsgAddedSignals () from /usr/kde/4.2/lib64/libkmailprivate.so.4
#16 0x00007f428f345cfa in KMFolderSearch::addSerNum () from /usr/kde/4.2/lib64/libkmailprivate.so.4
#17 0x00007f428f346686 in KMFolderSearch::qt_metacall () from /usr/kde/4.2/lib64/libkmailprivate.so.4
#18 0x00007f42a14ce233 in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#19 0x00007f428f341904 in KMSearch::slotSearchFolderResult () from /usr/kde/4.2/lib64/libkmailprivate.so.4
#20 0x00007f428f3437a3 in KMSearch::qt_metacall () from /usr/kde/4.2/lib64/libkmailprivate.so.4
#21 0x00007f42a14ce233 in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#22 0x00007f428f122915 in FolderStorage::searchResult () from /usr/kde/4.2/lib64/libkmailprivate.so.4
#23 0x00007f428f124681 in FolderStorage::slotProcessNextSearchBatch () from /usr/kde/4.2/lib64/libkmailprivate.so.4
#24 0x00007f428f343651 in KMSearch::slotProcessNextBatch () from /usr/kde/4.2/lib64/libkmailprivate.so.4
#25 0x00007f428f3437b8 in KMSearch::qt_metacall () from /usr/kde/4.2/lib64/libkmailprivate.so.4
#26 0x00007f42a14ce233 in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#27 0x00007f42a14ca5ab in QObject::event () from /usr/lib64/qt4/libQtCore.so.4
#28 0x00007f42a201f27d in QApplicationPrivate::notify_helper () from /usr/lib64/qt4/libQtGui.so.4
#29 0x00007f42a202545a in QApplication::notify () from /usr/lib64/qt4/libQtGui.so.4
#30 0x00007f42a326a10a in KApplication::notify () from /usr/kde/4.2/lib64/libkdeui.so.5
#31 0x00007f42a14bce88 in QCoreApplication::notifyInternal () from /usr/lib64/qt4/libQtCore.so.4
#32 0x00007f42a14e45be in QTimerInfoList::activateTimers () from /usr/lib64/qt4/libQtCore.so.4
#33 0x00007f42a14e128d in timerSourceDispatch () from /usr/lib64/qt4/libQtCore.so.4
#34 0x00007f429c8993d4 in g_main_dispatch () from /usr/lib/libglib-2.0.so.0
#35 0x00007f429c89b165 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#36 0x00007f429c89b33d in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#37 0x00007f42a14e11ef in QEventDispatcherGlib::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#38 0x00007f42a209db08 in QGuiEventDispatcherGlib::processEvents () from /usr/lib64/qt4/libQtGui.so.4
#39 0x00007f42a14bb7d2 in QEventLoop::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#40 0x00007f42a14bb975 in QEventLoop::exec () from /usr/lib64/qt4/libQtCore.so.4
#41 0x00007f42a14bda55 in QCoreApplication::exec () from /usr/lib64/qt4/libQtCore.so.4
#42 0x0000000000404f24 in main ()
Current language:  auto; currently asm