compiz crashed with SIGSEGV in RegexExp::evaluate()

[zorgoth]

Binary package hint: unity

This bug occurs using an ATI Mobility Radeon 5470 graphics card with the latest fglrx from the repositories (2:8.840-0ubuntu1), unity 3.8.6, and the latest compiz (0.9.4.0) from ubuntu-daily. Based on the replies forum post I wrote I believe this bug is probably related to ATI/fglrx. Ubuntu is 11.04 beta.

(Here is the post: http://ubuntuforums.org/showthread.php?p=10647375#post10647375)

Whenever I open a text menu, such as a menu from the global menubar, a right click context menu, the shutdown menu from the panel, or a various other menus, there is a decent chance that my compiz will crash (and usually recover in a few seconds). This bug only exists if Unity is active. It happens more often for menus I haven't used for a while than menus I just used, and with right click it happens more often if you right click a currently unfocused window.

I intentionally generated this by opening firefox and swiping my mouse down the global menubar. This reliably crashes Unity/compiz within 1-2 seconds. This bug is very serious. In general, I can expect a compiz crash every 2-5 minutes from standard use, invariably as a result of opening a text menu of the kind I describe.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: unity 3.8.6-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
Date: Mon Apr 11 20:51:38 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110330)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7fe4e7d1c335 <_ZN8RegexExp8evaluateEP10CompWindow+69>: mov (%rsi),%rsi
 PC (0x7fe4e7d1c335) ok
 source "(%rsi)" (0x00000010) not located in a known VMA region (needed readable region)!
 destination "%rsi" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 RegexExp::evaluate(CompWindow*) () from /usr/lib/compiz/libregex.so
 ?? ()
 ?? ()
 ?? ()
 DecorWindow::update(bool) () from /usr/lib/compiz/libdecor.so
Title: compiz crashed with SIGSEGV in RegexExp::evaluate()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin audio cdrom dialout lpadmin netdev plugdev sambashare video

[zorgoth (freepskov)]

Ubuntu 11.04 Natty beta 1

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #748383, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.