Application: kmail (1.13.6)
KDE Platform Version: 4.6.2 (4.6.2)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-11-generic x86_64
Distribution: Ubuntu 11.04

-- Information about the crash:
- What I was doing when the application crashed:
1. I clicked on attachment and then I clicked on Save as.
2. Nothing happend. So I repeated the first step.
3. The save dialog appeared after three reps and Kmail crashed.

- Unusual behavior I noticed:
Kmail was realy slow before.

-- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f467441a840 (LWP 2735))]

Thread 4 (Thread 0x7f465449b700 (LWP 2775)):
#0  __pthread_mutex_unlock (mutex=0x28d4e78) at pthread_mutex_unlock.c:289
#1  0x00007f466927b79a in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f466927c122 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f466927c639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4671cd1446 in QEventDispatcherGlib::processEvents (this=0x2819a60, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f4671ca5882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f4671ca5abc in QEventLoop::exec (this=0x7f465449ad10, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f4671bbc924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#8  0x00007f4671c87c2f in QInotifyFileSystemWatcherEngine::run (this=0x28e3430) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f4671bbf175 in QThreadPrivate::start (arg=0x28e3430) at thread/qthread_unix.cpp:320
#10 0x00007f466ef30d8c in start_thread (arg=0x7f465449b700) at pthread_create.c:304
#11 0x00007f467138104d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f46532a9700 (LWP 2798)):
#0  0x00007f4671373f03 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=<value optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f466927c104 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f466927c9f2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f46604adc44 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f46692a33e4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f466ef30d8c in start_thread (arg=0x7f46532a9700) at pthread_create.c:304
#6  0x00007f467138104d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f464ee53700 (LWP 3138)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007f464ee52a20 in ?? ()
#2  0x00007fffe28bf7b2 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 1 (Thread 0x7f467441a840 (LWP 2735)):
[KCrash Handler]
#6  0x00007f4672e5b5f2 in qstrnlen (this=0x51b3bd8) at /usr/include/qt4/QtCore/qbytearray.h:74
#7  QString (this=0x51b3bd8) at /usr/include/qt4/QtCore/qstring.h:429
#8  KMMessagePart::fileName (this=0x51b3bd8) at ../../kmail/kmmsgpart.cpp:437
#9  0x00007f4672fcc917 in KMSaveAttachmentsCommand::slotSaveAll (this=0x3fca020) at ../../kmail/kmcommands.cpp:2553
#10 0x00007f4672fd1270 in KMSaveAttachmentsCommand::qt_metacall (this=0x3fca020, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=<value optimized out>) at ./kmcommands.moc:895
#11 0x00007f4671cbb5f8 in QMetaObject::activate (sender=0x40837d0, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3287
#12 0x00007f4672fbf039 in KMLoadPartsCommand::execute (this=0x40837d0) at ../../kmail/kmcommands.cpp:2893
#13 0x00007f4672fb7107 in KMLoadPartsCommand::slotStart (this=0x40837d0) at ../../kmail/kmcommands.cpp:2867
#14 0x00007f4672fd0e86 in KMCommand::qt_metacall (this=0x40837d0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x4f4c350) at ./kmcommands.moc:92
#15 0x00007f4672fd10c0 in KMLoadPartsCommand::qt_metacall (this=0x40837d0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x4f4c350) at ./kmcommands.moc:2135
#16 0x00007f4671cba49a in QObject::event (this=0x40837d0, e=<value optimized out>) at kernel/qobject.cpp:1226
#17 0x00007f46721949f4 in QApplicationPrivate::notify_helper (this=0x26916a0, receiver=0x40837d0, e=0x4d839a0) at kernel/qapplication.cpp:4462
#18 0x00007f46721993ba in QApplication::notify (this=<value optimized out>, receiver=0x40837d0, e=0x4d839a0) at kernel/qapplication.cpp:4341
#19 0x00007f4673e44866 in KApplication::notify (this=0x7fffe28abdc0, receiver=0x40837d0, event=0x4d839a0) at ../../kdeui/kernel/kapplication.cpp:311
#20 0x00007f4671ca649c in QCoreApplication::notifyInternal (this=0x7fffe28abdc0, receiver=0x40837d0, event=0x4d839a0) at kernel/qcoreapplication.cpp:731
#21 0x00007f4671ca9c25 in sendEvent (receiver=0x0, event_type=0, data=0x25ffb30) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#22 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x25ffb30) at kernel/qcoreapplication.cpp:1372
#23 0x00007f4671cd1253 in sendPostedEvents (s=0x26913e0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#24 postEventSourceDispatch (s=0x26913e0) at kernel/qeventdispatcher_glib.cpp:277
#25 0x00007f466927bbcd in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f466927c3a8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f466927c639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f4671cd13ef in QEventDispatcherGlib::processEvents (this=0x25ff310, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#29 0x00007f467223e4de in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#30 0x00007f4671ca5882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#31 0x00007f4671ca5abc in QEventLoop::exec (this=0x7fffe28abc00, flags=...) at kernel/qeventloop.cpp:201
#32 0x00007f4671ca9ecb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#33 0x0000000000403175 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../kmail/main.cpp:158

Reported using DrKonqi