Application: kmail (1.13.3)
KDE Platform Version: 4.4.3 (KDE 4.4.3)
Qt Version: 4.6.2
Operating System: Linux 2.6.33-3.slh.5-sidux-686 i686
Distribution: Debian GNU/Linux unstable (sid)

-- Information about the crash:
I checked some old gmail folders via imap. Some had thousands of unread mails. I used the right click menu and the option "mark whole folder as read" (translated from german localization) on three folders and switch to iceweasel to read a news I opened from a mail before. After some time surfing DrKonqi told me that kmail had crashed.

Thanks for all efforts.
PS: The most bugreports DrKonqi are showing me to check for duplication are dealing with konqueror. Confusing, isn't it?

 -- Backtrace:
Application: KMail (kmail), signal: Aborted
[Current thread is 1 (Thread 0xb270f700 (LWP 12272))]

Thread 2 (Thread 0xb0794b70 (LWP 12376)):
#0  0xb7791424 in __kernel_vsyscall ()
#1  0xb599eb63 in __lll_lock_wait_private () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/lowlevellock.S:95
#2  0xb593391d in _L_lock_9675 () from /lib/i686/cmov/libc.so.6
#3  0xb59320d6 in *__GI___libc_free (mem=0x8bfec00) at malloc.c:3736
#4  0xb3eaac56 in IA__g_free (mem=0x8bfec00) at /build/buildd-glib2.0_2.24.1-1-i386-84Pp4V/glib2.0-2.24.1/glib/gmem.c:191
#5  0xb3ea1c6a in g_source_unref_internal (source=0x8bfec00, context=<value optimized out>, have_lock=0) at /build/buildd-glib2.0_2.24.1-1-i386-84Pp4V/glib2.0-2.24.1/glib/gmain.c:1339
#6  0xb6758e1d in ~QEventDispatcherGlib (this=0x8c01ef0, __in_chrg=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:366
#7  0xb662a4aa in QThreadPrivate::finish (arg=0xb6842370) at thread/qthread_unix.cpp:284
#8  0xb662a946 in ~__pthread_cleanup_class (arg=0xb6842370) at /usr/include/pthread.h:535
#9  QThreadPrivate::start (arg=0xb6842370) at thread/qthread_unix.cpp:253
#10 0xb46f8585 in start_thread (arg=0xb0794b70) at pthread_create.c:300
#11 0xb599129e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 1 (Thread 0xb270f700 (LWP 12272)):
[KCrash Handler]
#6  0xb7791424 in __kernel_vsyscall ()
#7  0xb58ec8e0 in *__GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#8  0xb58efe15 in *__GI_abort () at abort.c:88
#9  0xb59236c5 in __libc_message (do_abort=2, fmt=0xb59ea0e8 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:173
#10 0xb592d824 in malloc_printerr (action=2, str=0xb59ea270 "double free or corruption (out)", ptr=0x9fbed00) at malloc.c:6239
#11 0xb592f0b3 in _int_free (av=0xb5a063c0, p=0x9fbecf8) at malloc.c:4772
#12 0xb59320dd in *__GI___libc_free (mem=0x9fbed00) at malloc.c:3738
#13 0xb662508d in qFree (ptr=0x9fbed00) at global/qmalloc.cpp:60
#14 0xb673c894 in ~QMetaCallEvent (this=0xa0cc760, __in_chrg=<value optimized out>) at kernel/qobject.cpp:549
#15 0xb672f2d5 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x89b9fb8) at kernel/qcoreapplication.cpp:1361
#16 0xb672f42d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1238
#17 0xb67587ff in QCoreApplication::sendPostedEvents (s=0x89ecf10) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#18 postEventSourceDispatch (s=0x89ecf10) at kernel/qeventdispatcher_glib.cpp:276
#19 0xb3ea22f5 in g_main_dispatch (context=0x89ece90) at /build/buildd-glib2.0_2.24.1-1-i386-84Pp4V/glib2.0-2.24.1/glib/gmain.c:1960
#20 IA__g_main_context_dispatch (context=0x89ece90) at /build/buildd-glib2.0_2.24.1-1-i386-84Pp4V/glib2.0-2.24.1/glib/gmain.c:2513
#21 0xb3ea5fd8 in g_main_context_iterate (context=0x89ece90, block=<value optimized out>, dispatch=1, self=0x89e1638) at /build/buildd-glib2.0_2.24.1-1-i386-84Pp4V/glib2.0-2.24.1/glib/gmain.c:2591
#22 0xb3ea61b8 in IA__g_main_context_iteration (context=0x89ece90, may_block=1) at /build/buildd-glib2.0_2.24.1-1-i386-84Pp4V/glib2.0-2.24.1/glib/gmain.c:2654
#23 0xb67582f5 in QEventDispatcherGlib::processEvents (this=0x89b9c98, flags=...) at kernel/qeventdispatcher_glib.cpp:412
#24 0xb5d32255 in QGuiEventDispatcherGlib::processEvents (this=0x89b9c98, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#25 0xb672af09 in QEventLoop::processEvents (this=0xbfc41e14, flags=) at kernel/qeventloop.cpp:149
#26 0xb672b35a in QEventLoop::exec (this=0xbfc41e14, flags=...) at kernel/qeventloop.cpp:201
#27 0xb672f4ef in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#28 0xb5c73c87 in QApplication::exec () at kernel/qapplication.cpp:3579
#29 0x0804aafe in _start ()

Possible duplicates by query: bug 228333, bug 228223, bug 227104, bug 223957, bug 223723.

Reported using DrKonqi