glxinfo crashed with SIGSEGV in XF86DRIQueryExtension()

[hadi]

i get this bug when i run glxinfo | grep rendering command.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: mesa-utils 8.0.1+git20110129+d8f7d6b-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
CrashCounter: 1
Date: Fri Apr 8 20:52:00 2011
ExecutablePath: /usr/bin/glxinfo
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta 1 i386 (20110329.1)
ProcCmdline: glxinfo
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
 LANGUAGE=en_US:en
SegvAnalysis:
 Segfault happened at: 0xb776a824 <XF86DRIQueryExtension+142>: movzbl 0x4(%esi),%edx
 PC (0xb776a824) ok
 source "0x4(%esi)" (0x00000004) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: mesa-demos
Stacktrace:
 #0 0xb776a824 in XF86DRIQueryExtension () from /usr/lib/fglrx/libGL.so.1
 No symbol table info available.
 #1 0xb760caa6 in ?? () from /usr/lib/i386-linux-gnu/libX11.so.6
 No symbol table info available.
StacktraceTop:
 XF86DRIQueryExtension () from /usr/lib/fglrx/libGL.so.1
 ?? () from /usr/lib/i386-linux-gnu/libX11.so.6
Title: glxinfo crashed with SIGSEGV in XF86DRIQueryExtension()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[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 #747565, 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.