Application: plasma-desktop (0.4)
KDE Platform Version: 4.9.4
Qt Version: 4.8.3
Operating System: Linux 3.5.0-17-generic x86_64
Distribution: Linux Mint 14 Nadia

-- Information about the crash:
Nothing. I had just logged in when it spontaneously crashed. It also happens intermittently for no reason that I can discern.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fe4e9903780 (LWP 1993))]

Thread 4 (Thread 0x7fe4d843a700 (LWP 1996)):
#0  0x00007fe4fcc8c8bd in read () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007fe4f096a15f in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe4f092d914 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe4f092dd22 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe4f092dea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe4f993cc16 in QEventDispatcherGlib::processEvents (this=0x7fe4d00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007fe4f990d2bf in QEventLoop::processEvents (this=this@entry=0x7fe4d8439dd0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fe4f990d548 in QEventLoop::exec (this=0x7fe4d8439dd0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007fe4f980eb10 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007fe4f98ed9af in QInotifyFileSystemWatcherEngine::run (this=0x171f580) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007fe4f9811aec in QThreadPrivate::start (arg=0x171f580) at thread/qthread_unix.cpp:338
#11 0x00007fe4f102ce9a in start_thread (arg=0x7fe4d843a700) at pthread_create.c:308
#12 0x00007fe4fcc99cbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fe4d70e5700 (LWP 1997)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fe4f6993cd7 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007fe4f6993d09 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007fe4f102ce9a in start_thread (arg=0x7fe4d70e5700) at pthread_create.c:308
#4  0x00007fe4fcc99cbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fe4cffff700 (LWP 1999)):
#0  0x00007fe4fcc8e303 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fe4f092dd84 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe4f092e1e2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe4d52014a6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fe4f0951645 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe4f102ce9a in start_thread (arg=0x7fe4cffff700) at pthread_create.c:308
#6  0x00007fe4fcc99cbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fe4e9903780 (LWP 1993)):
[KCrash Handler]
#6  QHash<QObject*, QObject**>::findNode (this=this@entry=0x1633820, akey=@0x7fff84973ad0: 0x18ed590, ahp=ahp@entry=0x0) at ../../include/QtCore/../../src/corelib/tools/qhash.h:895
#7  0x00007fe4f9922480 in find (akey=@0x7fff84973ad0: 0x18ed590, this=0x1633820) at ../../include/QtCore/../../src/corelib/tools/qhash.h:868
#8  QMetaObject::removeGuard (ptr=0x7fff84973ad0) at kernel/qobject.cpp:419
#9  0x00007fe4f8cb6d21 in ~QPointer (this=0x7fff84973ad0, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qpointer.h:64
#10 QApplicationPrivate::sendMouseEvent (receiver=0x18ed590, event=0x7fff84973c20, alienWidget=<optimized out>, nativeWidget=<optimized out>, buttonDown=<optimized out>, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3197
#11 0x00007fe4f8d34554 in QETWidget::translateMouseEvent (this=this@entry=0x2214230, event=event@entry=0x7fff849743a0) at kernel/qapplication_x11.cpp:4622
#12 0x00007fe4f8d3344f in QApplication::x11ProcessEvent (this=0x15cb2a0, event=0x7fff849743a0) at kernel/qapplication_x11.cpp:3737
#13 0x00007fe4f8d5afa2 in x11EventSourceDispatch (s=0x15e6070, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#14 0x00007fe4f092dab5 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#15 0x00007fe4f092dde8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007fe4f092dea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007fe4f993cbf6 in QEventDispatcherGlib::processEvents (this=0x156bad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#18 0x00007fe4f8d5ac1e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#19 0x00007fe4f990d2bf in QEventLoop::processEvents (this=this@entry=0x7fff84974770, flags=...) at kernel/qeventloop.cpp:149
#20 0x00007fe4f990d548 in QEventLoop::exec (this=0x7fff84974770, flags=...) at kernel/qeventloop.cpp:204
#21 0x00007fe4f9912708 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#22 0x00007fe4fcfa0035 in kdemain (argc=1, argv=0x7fff84974a68) at ../../../../plasma/desktop/shell/main.cpp:120
#23 0x00007fe4fcbc776d in __libc_start_main (main=0x4006a0 <main(int, char**)>, argc=1, ubp_av=0x7fff84974a68, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff84974a58) at libc-start.c:226
#24 0x00000000004006d1 in _start ()

Reported using DrKonqi