Application that crashed: kontact
Version of the application: 4.3.4
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.3
Operating System: Linux 2.6.27-1-mepis64-smp x86_64
Distribution: MEPIS 8.5 (upgradable from Debian lenny)

What I was doing when the application crashed:
Using the Kontact calendar program. Was checking tabs (time line-monthly weekly) in the calendar and tried to close the program, then realised it had hung up.

 -- Backtrace:
Application: Kontact (kontact), signal: Aborted
[Current thread is 0 (LWP 8173)]

Thread 2 (Thread 0x421ef950 (LWP 8174)):
#0  0x00007fe0c92a702e in __lll_lock_wait_private () from /lib/libc.so.6
#1  0x00007fe0c9244b43 in _L_lock_4488 () from /lib/libc.so.6
#2  0x00007fe0c9241aab in free () from /lib/libc.so.6
#3  0x00007fe0c34a73fa in g_source_unref_internal (source=0x26ea750, context=0x26e9e70, have_lock=0) at /usr/src/projects/pkgs/main-8.5/KDE4-aug/glib2.0/glib2.0-2.21.4/glib/gmain.c:1339
#4  0x00007fe0ca5c50c9 in ~QEventDispatcherGlib (this=0x26e4c20) at kernel/qeventdispatcher_glib.cpp:380
#5  0x00007fe0ca4b286c in QThreadPrivate::finish (arg=<value optimized out>) at thread/qthread_unix.cpp:212
#6  0x00007fe0ca4b27ad in QThreadPrivate::start (arg=0x1d35920) at /usr/include/pthread.h:533
#7  0x00007fe0c3256fc7 in start_thread () from /lib/libpthread.so.0
#8  0x00007fe0c929b64d in clone () from /lib/libc.so.6
#9  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fe0cbba36f0 (LWP 8173)):
[KCrash Handler]
#5  0x00007fe0c91fded5 in raise () from /lib/libc.so.6
#6  0x00007fe0c91ff3f3 in abort () from /lib/libc.so.6
#7  0x00007fe0c923a408 in __libc_message () from /lib/libc.so.6
#8  0x00007fe0c923f9a8 in malloc_printerr () from /lib/libc.so.6
#9  0x00007fe0c923fc3a in malloc_consolidate () from /lib/libc.so.6
#10 0x00007fe0c9242326 in _int_malloc () from /lib/libc.so.6
#11 0x00007fe0c9243ad8 in malloc () from /lib/libc.so.6
#12 0x00007fe0ca4b5965 in QByteArray::resize (this=0x7fff93d6f3b0, size=9156) at tools/qbytearray.cpp:1336
#13 0x00007fe0c607af65 in KMime::Codec::decode (this=0x285e8d0, src=@0x2e66fc8, withCRLF=<value optimized out>) at ../../kmime/kmime_codecs.cpp:164
#14 0x00007fe0b2e3192f in KMMessagePart::bodyDecodedBinary (this=0x2e66f88) at ../../kmail/kmmsgpart.cpp:265
#15 0x00007fe0b2fce7d9 in KMHandleAttachmentCommand::createAtmFileLink (this=0x25e6050) at ../../kmail/kmcommands.cpp:2972
#16 0x00007fe0b2fd0a05 in KMHandleAttachmentCommand::atmOpen (this=0x25e6050) at ../../kmail/kmcommands.cpp:3035
#17 0x00007fe0b2fd215d in KMHandleAttachmentCommand::execute (this=0x1fed) at ../../kmail/kmcommands.cpp:2936
#18 0x00007fe0b2fce56a in KMHandleAttachmentCommand::slotStart (this=0x25e6050) at ../../kmail/kmcommands.cpp:2922
#19 0x00007fe0b2fbc6eb in KMHandleAttachmentCommand::qt_metacall (this=0x25e6050, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff93d6f7a0) at ./kmcommands.moc:2240
#20 0x00007fe0ca5b0632 in QMetaObject::activate (sender=0x30c2330, from_signal_index=<value optimized out>, to_signal_index=4, argv=0xffffffffffffffff) at kernel/qobject.cpp:3112
#21 0x00007fe0ca5b58df in QSingleShotTimer::timerEvent (this=0x30c2330) at kernel/qtimer.cpp:298
#22 0x00007fe0ca5aa9f3 in QObject::event (this=0x30c2330, e=0x1fed) at kernel/qobject.cpp:1074
#23 0x00007fe0c9a0316d in QApplicationPrivate::notify_helper (this=0x1d42a00, receiver=0x30c2330, e=0x7fff93d6fe60) at kernel/qapplication.cpp:4065
#24 0x00007fe0c9a0b3da in QApplication::notify (this=0x7fff93d702b0, receiver=0x30c2330, e=0x7fff93d6fe60) at kernel/qapplication.cpp:4030
#25 0x00007fe0caf43d9b in KApplication::notify (this=0x7fff93d702b0, receiver=0x30c2330, event=0x7fff93d6fe60) at ../../kdeui/kernel/kapplication.cpp:302
#26 0x00007fe0ca59af0c in QCoreApplication::notifyInternal (this=0x7fff93d702b0, receiver=0x30c2330, event=0x7fff93d6fe60) at kernel/qcoreapplication.cpp:610
#27 0x00007fe0ca5c81f6 in QTimerInfoList::activateTimers (this=0x1d34460) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#28 0x00007fe0ca5c4518 in idleTimerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#29 0x00007fe0c34a7ada in IA__g_main_context_dispatch (context=0x1d33480) at /usr/src/projects/pkgs/main-8.5/KDE4-aug/glib2.0/glib2.0-2.21.4/glib/gmain.c:1960
#30 0x00007fe0c34ab378 in g_main_context_iterate (context=0x1d33480, block=1, dispatch=1, self=<value optimized out>)
    at /usr/src/projects/pkgs/main-8.5/KDE4-aug/glib2.0/glib2.0-2.21.4/glib/gmain.c:2591
#31 0x00007fe0c34ab53c in IA__g_main_context_iteration (context=0x1d33480, may_block=1) at /usr/src/projects/pkgs/main-8.5/KDE4-aug/glib2.0/glib2.0-2.21.4/glib/gmain.c:2654
#32 0x00007fe0ca5c424c in QEventDispatcherGlib::processEvents (this=0x1d09da0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:407
#33 0x00007fe0c9a9bb1f in QGuiEventDispatcherGlib::processEvents (this=0x1fed, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#34 0x00007fe0ca5997a2 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -1814626096}) at kernel/qeventloop.cpp:149
#35 0x00007fe0ca599b74 in QEventLoop::exec (this=0x7fff93d70110, flags={i = -1814626016}) at kernel/qeventloop.cpp:201
#36 0x00007fe0ca59be44 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#37 0x0000000000404741 in main (argc=1, argv=0x7fff93d70888) at ../../../kontact/src/main.cpp:218

Reported using DrKonqi