Application: kmail (4.14.8)
KDE Platform Version: 4.14.8
Qt Version: 4.8.6
Operating System: Linux 3.19.4-1-desktop x86_64
Distribution: "openSUSE 20150516 (Tumbleweed) (x86_64)"

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

using kdevelop + konsole + chromium normally

- Unusual behavior I noticed:

krunner crashes
plasmashell lockups (menu)

-- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
81	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[Current thread is 1 (Thread 0x7fe9ba9568c0 (LWP 635))]

Thread 4 (Thread 0x7fe9945bb700 (LWP 638)):
#0  0x00007fe9b07cf91f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fe9acba5896 in WTF::TCMalloc_PageHeap::scavengerThread() () at /usr/lib64/libQtWebKit.so.4
#2  0x00007fe9acba58c9 in  () at /usr/lib64/libQtWebKit.so.4
#3  0x00007fe9b07cb484 in start_thread (arg=0x7fe9945bb700) at pthread_create.c:333
#4  0x00007fe9b7c7aa4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fe953418700 (LWP 639)):
#0  0x00007fe9b07cf91f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fe9ac9183cd in JSC::BlockAllocator::blockFreeingThreadMain() () at /usr/lib64/libQtWebKit.so.4
#2  0x00007fe9acbcd406 in WTF::wtfThreadEntryPoint(void*) () at /usr/lib64/libQtWebKit.so.4
#3  0x00007fe9b07cb484 in start_thread (arg=0x7fe953418700) at pthread_create.c:333
#4  0x00007fe9b7c7aa4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fe9525aa700 (LWP 640)):
[KCrash Handler]
#5  0x00007fe9a6f03b3e in _dbus_counter_notify (counter=0x2542a10) at dbus-resources.c:187
#6  0x00007fe9a6efcbc2 in free_counter (element=0x2542a10, data=0x3d1cd40) at dbus-message.c:639
#7  0x00007fe9a6efd0d2 in dbus_message_unref (message=0x3d1cd40) at dbus-message.c:661
#8  0x00007fe9a6efd0d2 in dbus_message_unref (message=0x3d1cd40) at dbus-message.c:1707
#9  0x00007fe9b2383b09 in QDBusArgument::~QDBusArgument() (message=<optimized out>) at qdbus_symbols_p.h:296
#10 0x00007fe9b2383b09 in QDBusArgument::~QDBusArgument() (this=<optimized out>, __in_chrg=<optimized out>) at qdbusargument.cpp:66
#11 0x00007fe9b2383b09 in QDBusArgument::~QDBusArgument() (this=0x2542a10, __in_chrg=<optimized out>) at qdbusargument.cpp:348
#12 0x00007fe9b236076e in qMetaTypeDeleteHelper<QDBusArgument>(QDBusArgument*) (t=0x365eb10) at ../../src/corelib/kernel/qmetatype.h:134
#13 0x00007fe9b92bb9b3 in clear(QVariant::Private*) (d=0x3975ff0) at kernel/qvariant.cpp:290
#14 0x00007fe9b234fa5c in QList<QVariant>::~QList() (this=<optimized out>, to=<optimized out>, from=<optimized out>) at ../../src/corelib/tools/qlist.h:431
#15 0x00007fe9b234fa5c in QList<QVariant>::~QList() (this=<optimized out>, data=<optimized out>) at ../../src/corelib/tools/qlist.h:757
#16 0x00007fe9b234fa5c in QList<QVariant>::~QList() (this=0x2542a10, __in_chrg=<optimized out>) at ../../src/corelib/tools/qlist.h:732
#17 0x00007fe9b2363f7f in QDBusMessage::~QDBusMessage() (this=0x2542a10, __in_chrg=<optimized out>) at qdbusmessage.cpp:537
#18 0x00007fe9b2360d56 in QDBusCallDeliveryEvent::~QDBusCallDeliveryEvent() (this=0x38264c0, __in_chrg=<optimized out>) at qdbusintegrator_p.h:93
#19 0x00007fe9b2360d56 in QDBusCallDeliveryEvent::~QDBusCallDeliveryEvent() (this=0x38264c0, __in_chrg=<optimized out>) at qdbusintegrator_p.h:93
#20 0x00007fe9b929b596 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x29df940) at kernel/qcoreapplication.cpp:1593
#21 0x00007fe9b929ba33 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#22 0x00007fe9b92c590e in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) () at kernel/qcoreapplication.h:236
#23 0x00007fe9b92c590e in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x7fe9440012e0) at kernel/qeventdispatcher_glib.cpp:300
#24 0x00007fe9af9aac74 in g_main_context_dispatch (context=0x7fe9440009a0) at gmain.c:3122
#25 0x00007fe9af9aac74 in g_main_context_dispatch (context=context@entry=0x7fe9440009a0) at gmain.c:3737
#26 0x00007fe9af9aaec8 in g_main_context_iterate (context=context@entry=0x7fe9440009a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3808
#27 0x00007fe9af9aaf6c in g_main_context_iteration (context=0x7fe9440009a0, may_block=1) at gmain.c:3869
#28 0x00007fe9b92c50ce in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fe9440008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:450
#29 0x00007fe9b9296e7f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fe9525a9d20, flags=...) at kernel/qeventloop.cpp:149
#30 0x00007fe9b9297175 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fe9525a9d20, flags=...) at kernel/qeventloop.cpp:204
#31 0x00007fe9b919451f in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:538
#32 0x00007fe9b9196bff in QThreadPrivate::start(void*) (arg=0x25f1dc0) at thread/qthread_unix.cpp:349
#33 0x00007fe9b07cb484 in start_thread (arg=0x7fe9525aa700) at pthread_create.c:333
#34 0x00007fe9b7c7aa4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fe9ba9568c0 (LWP 635)):
#0  0x00007fe9b7c6e59d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fe9af9ebb20 in g_wakeup_acknowledge (__nbytes=16, __buf=0x7ffdba6e4050, __fd=<optimized out>) at /usr/include/bits/unistd.h:44
#2  0x00007fe9af9ebb20 in g_wakeup_acknowledge (wakeup=0x1ed7330) at gwakeup.c:210
#3  0x00007fe9af9aa989 in g_main_context_check (context=context@entry=0x1f31ec0, max_priority=2147483647, fds=fds@entry=0x46ce330, n_fds=n_fds@entry=10) at gmain.c:3600
#4  0x00007fe9af9aade8 in g_main_context_iterate (context=context@entry=0x1f31ec0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3805
#5  0x00007fe9af9aaf6c in g_main_context_iteration (context=0x1f31ec0, may_block=1) at gmain.c:3869
#6  0x00007fe9b92c50ee in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x1ece110, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#7  0x00007fe9b86cd706 in QGuiEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#8  0x00007fe9b9296e7f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffdba6e4280, flags=...) at kernel/qeventloop.cpp:149
#9  0x00007fe9b9297175 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffdba6e4280, flags=...) at kernel/qeventloop.cpp:204
#10 0x00007fe9b929c5c9 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1225
#11 0x0000000000402f3f in  ()
#12 0x00007fe9b7bb48c5 in __libc_start_main (main=0x4024b0, argc=3, argv=0x7ffdba6e4858, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffdba6e4848) at libc-start.c:289
#13 0x0000000000403419 in _start ()

Reported using DrKonqi