Application: kwin (4.9.00)
KDE Platform Version: 4.9.00
Qt Version: 4.8.2
Operating System: Linux 3.2.0-31-generic x86_64
Distribution: Ubuntu 12.04.1 LTS

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

I was trying to shut down the computer and during powering off kwin just crashed.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[KCrash Handler]
#6  0x0000000000000000 in ?? ()
#7  0x00007f85543c55df in KWin::Unmanaged::release (this=0x24ed780, on_shutdown=true) at ../../kwin/unmanaged.cpp:90
#8  0x00007f8554356902 in KWin::Workspace::~Workspace (this=0x2182c90, __in_chrg=<optimized out>) at ../../kwin/workspace.cpp:537
#9  0x00007f8554357149 in KWin::Workspace::~Workspace (this=0x2182c90, __in_chrg=<optimized out>) at ../../kwin/workspace.cpp:564
#10 0x00007f8554372735 in KWin::Application::~Application (this=0x7fff2c0cdb50, __in_chrg=<optimized out>) at ../../kwin/main.cpp:343
#11 0x00007f8554374fe4 in kdemain (argc=<optimized out>, argv=<optimized out>) at ../../kwin/main.cpp:545
#12 0x00007f8553f7576d in __libc_start_main (main=0x400630 <main(int, char**)>, argc=1, ubp_av=0x7fff2c0ce248, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff2c0ce238) at libc-start.c:226
#13 0x0000000000400661 in _start ()

This bug may be a duplicate of or related to bug 303244.

Possible duplicates by query: bug 305944, bug 304538, bug 303244, bug 301165, bug 299933.

Reported using DrKonqi