Application that crashed: kmail
Version of the application: 1.12.0
KDE Version: 4.2.98 (KDE 4.2.98 (KDE 4.3 RC3))
Qt Version: 4.5.0
Operating System: Linux 2.6.28-13-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
creating gmail disconnected imap account and the whole application crashed after the final dialogue

 -- Backtrace:
Application: KMail (kmail), signal: Aborted
[Current thread is 0 (LWP 342)]

Thread 2 (Thread 0x7ffcb4670950 (LWP 353)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007ffcce324939 in QWaitCondition::wait (this=0x20477e0, mutex=0x20477d8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007ffccf8894cc in QHostInfoAgent::run (this=0x20477c0) at kernel/qhostinfo.cpp:260
#3  0x00007ffcce323952 in QThreadPrivate::start (arg=0x20477c0) at thread/qthread_unix.cpp:189
#4  0x00007ffcc90c23ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007ffccd880fcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7ffcd35b1750 (LWP 342)):
[KCrash Handler]
#5  0x00007ffccd7cdfb5 in *__GI_raise (sig=<value optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#6  0x00007ffccd7cfbc3 in *__GI_abort () at abort.c:88
#7  0x00007ffccd80d228 in __libc_message (do_abort=2, fmt=0x7ffccd8d7488 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:170
#8  0x00007ffccd812cb8 in malloc_printerr (action=2, str=0x7ffccd8d4a86 "free(): invalid pointer", ptr=<value optimized out>) at malloc.c:5994
#9  0x00007ffccd815276 in *__GI___libc_free (mem=0x7ffccd8cd8a0) at malloc.c:3625
#10 0x00007ffcce41082c in QList<QPostEvent>::erase (this=0x936ac8, afirst={i = 0x6}, alast={i = 0xffffffffffffffff}) at ../../include/QtCore/../../src/corelib/tools/qlist.h:348
#11 0x00007ffcce40d32d in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x936aa0) at kernel/qcoreapplication.cpp:1271
#12 0x00007ffcce4361e3 in postEventSourceDispatch (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#13 0x00007ffcc52b920a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#14 0x00007ffcc52bc8e0 in ?? () from /usr/lib/libglib-2.0.so.0
#15 0x00007ffcc52bca7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#16 0x00007ffcce435e6f in QEventDispatcherGlib::processEvents (this=0x9366d0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:323
#17 0x00007ffccebe9bef in QGuiEventDispatcherGlib::processEvents (this=0x156, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#18 0x00007ffcce40b002 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -614487936}) at kernel/qeventloop.cpp:149
#19 0x00007ffcce40b3cd in QEventLoop::exec (this=0x7fffdb5fa8c0, flags={i = -614487856}) at kernel/qeventloop.cpp:200
#20 0x00007ffcce40d694 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#21 0x00000000004030db in _start ()

Reported using DrKonqi