Application: kwin (4.8.5 (4.8.5))
KDE Platform Version: 4.8.5 (4.8.5)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-32-generic x86_64
Distribution: Ubuntu 12.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:

I exited some windows and just wanted to shutdown the computer.... then this crash. i've noticed a function in Firefox didn't work anymore, it is the drag a link to another tab or drag a tab out of the main Firefox window..  I don(t if it is relevant but it was surprising because it worked before!

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f0e07de0780 (LWP 2391))]

Thread 3 (Thread 0x7f0de7fff700 (LWP 2394)):
#0  0x00007f0e075e8023 in select () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007f0e02e37366 in qt_safe_select (nfds=18, fdread=0x7f0de0000ac8, fdwrite=0x7f0de0000d60, fdexcept=0x7f0de0000ff8, orig_timeout=<optimized out>) at kernel/qcore_unix.cpp:83
#2  0x00007f0e02e3c7b2 in QEventDispatcherUNIXPrivate::doSelect (this=0x7f0de0000910, flags=..., timeout=0x0) at kernel/qeventdispatcher_unix.cpp:223
#3  0x00007f0e02e3cca3 in QEventDispatcherUNIX::processEvents (this=0x7f0de00008f0, flags=...) at kernel/qeventdispatcher_unix.cpp:926
#4  0x00007f0e02e09c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f0e02e09ed7 in QEventLoop::exec (this=0x7f0de7ffedd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f0e02d08fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007f0e02de99ff in QInotifyFileSystemWatcherEngine::run (this=0x1f072e0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f0e02d0bfcb in QThreadPrivate::start (arg=0x1f072e0) at thread/qthread_unix.cpp:298
#9  0x00007f0dfbf30e9a in start_thread (arg=0x7f0de7fff700) at pthread_create.c:308
#10 0x00007f0e075eecbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f0de77fe700 (LWP 2395)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f0e040a3222 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f0e040a3259 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f0dfbf30e9a in start_thread (arg=0x7f0de77fe700) at pthread_create.c:308
#4  0x00007f0e075eecbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f0e07de0780 (LWP 2391)):
[KCrash Handler]
#6  0x0000000000000000 in ?? ()
#7  0x00007f0e0798692a in KWin::Deleted::copyToDeleted (this=0x2262080, c=0x22b3ed0) at ../../kwin/deleted.cpp:78
#8  0x00007f0e07986bad in KWin::Deleted::create (c=0x22b3ed0) at ../../kwin/deleted.cpp:53
#9  0x00007f0e07968570 in KWin::Unmanaged::release (this=0x22b3ed0) at ../../kwin/unmanaged.cpp:85
#10 0x00007f0e07900ced in KWin::Workspace::~Workspace (this=0x1eb57a0, __in_chrg=<optimized out>) at ../../kwin/workspace.cpp:533
#11 0x00007f0e07901559 in KWin::Workspace::~Workspace (this=0x1eb57a0, __in_chrg=<optimized out>) at ../../kwin/workspace.cpp:563
#12 0x00007f0e07918305 in KWin::Application::~Application (this=0x7fff0e41b890, __in_chrg=<optimized out>) at ../../kwin/main.cpp:340
#13 0x00007f0e0791ac94 in kdemain (argc=<optimized out>, argv=<optimized out>) at ../../kwin/main.cpp:541
#14 0x00007f0e0751c76d in __libc_start_main (main=0x400630 <main(int, char**)>, argc=3, ubp_av=0x7fff0e41bfb8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff0e41bfa8) at libc-start.c:226
#15 0x0000000000400661 in _start ()

This bug may be a duplicate of or related to bug 299076.

Possible duplicates by query: bug 308593, bug 307068, bug 302768, bug 301165, bug 299933.

Reported using DrKonqi