unity-window-decorator crashed with SIGSEGV in draw_decor_list()

StacktraceTop:
 draw_decor_list (data=0x0) at /build/buildd/compiz-0.9.4/unity/unity_window_decorator/src/decorator.c:686
 g_idle_dispatch (source=0x92af178, callback=0x805c120 <draw_decor_list>, user_data=0x0) at /build/buildd/glib2.0-2.28.1/./glib/gmain.c:4537
 g_main_dispatch (context=0x9109e20) at /build/buildd/glib2.0-2.28.1/./glib/gmain.c:2440
 g_main_context_dispatch (context=0x9109e20) at /build/buildd/glib2.0-2.28.1/./glib/gmain.c:3013
 g_main_context_iterate (context=0x9109e20, block=5032096, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.1/./glib/gmain.c:3091

Can I get some detailed steps to reproduce, that trace isn't useful

Hi

Like I said:

I was synchronizing my music files using grsync and looking at photos
using shockwell when compiz closed unexpectedly.

I do not know which action caused the problem, but I was stepping
through some photos using the shockwell photo viewer. At the same time
grsync was updating my music library. It happens more often on my Dell
Inspiron 1521. I try to reproduce it.

Best regards

Bert

On Mon, 2011-02-28 at 11:55 +0000, Sam "SmSpillaz" Spilsbury wrote:
> Can I get some detailed steps to reproduce, that trace isn't useful
>

Confirming from dup bug #725982, which also has compiz valgrind log.

Got this this time:

Program received signal SIGSEGV, Segmentation fault.
window_closed (screen=0x9286810, win=0x93532a0) at /build/buildd/compiz-0.9.4/unity/unity_window_decorator/src/wnck.c:722
722 /build/buildd/compiz-0.9.4/unity/unity_window_decorator/src/wnck.c: No such file or directory.
 in /build/buildd/compiz-0.9.4/unity/unity_window_decorator/src/wnck.c

but stupidly typed 'cont' instead of 'bt'. Assuming it's the same crash, and not another one.

(gdb) frame
#0 0x0805c145 in draw_decor_list (data=0x0)
    at /build/buildd/compiz-0.9.4/unity/unity_window_decorator/src/decorator.c:686
686 in /build/buildd/compiz-0.9.4/unity/unity_window_decorator/src/decorator.c

Null pointer. Great.

sam said the diff on http://paste.ubuntu.com/573543/ should fix it

one easy way to trigger the crash is to use update-manager, click on check updates and close the dialog

This bug was fixed in the package compiz - 1:0.9.4-0ubuntu2

---------------
compiz (1:0.9.4-0ubuntu2) natty; urgency=low

  * Force libdecoration0 to have the same version than compiz-plugins
  * debian/patches/01_unity_window_decorator.patch
    - fix a crash in unity-window-decorator (LP: #726063, #725284, #726101)
  * Backport some patches from upstream to fix other crashes and bring
    support to the unity plugin (LP: #726702)
  * debian/compiz-core.install:
    png are now installed in /usr/share/compiz
  * add the future unity mt plugin by default
 -- Didier Roche <email address hidden> Mon, 28 Feb 2011 20:51:00 +0100

Easy steps to reproduce: send an email from Thunderbird. Crashes unity-window-decorator every single time.

On 28 February 2011 11:55, Sam "SmSpillaz" Spilsbury
<email address hidden> wrote:
> Can I get some detailed steps to reproduce, that trace isn't useful

Nope - it just happened in the middle of a normal desktop session
without any particular actions.

--
Matthew East
http://www.mdke.org
gnupg pub 1024D/0E6B06FF

# Ubuntu 64
# Run compiz
# Run thunderbird
# Send message with thunderbird
# Boom - compiz crashes :)