compiz crashed with SIGSEGV in nux::WindowCompositor::RenderTopViews()

[surasit]

always, after log on, the report of clash present!!

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: libnux-0.9-0 0.9.42-0ubuntu1
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: Fri Apr 15 00:10:36 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: 0x7ff01b20e191 <_ZN3nux16WindowCompositor14RenderTopViewsEbRSt4listINS_13ObjectWeakPtrINS_10BaseWindowEEESaIS4_EEbb+97>: mov 0x8(%rbx),%r13
 PC (0x7ff01b20e191) ok
 source "0x8(%rbx)" (0x00000008) not located in a known VMA region (needed readable region)!
 destination "%r13" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: nux
StacktraceTop:
 nux::WindowCompositor::RenderTopViews(bool, std::list<nux::ObjectWeakPtr<nux::BaseWindow>, std::allocator<nux::ObjectWeakPtr<nux::BaseWindow> > >&, bool, bool) () from /usr/lib/libnux-0.9.so.0
 nux::WindowCompositor::Draw(bool, bool) () from /usr/lib/libnux-0.9.so.0
 nux::WindowThread::RenderInterfaceFromForeignCmd(nux::Rect*) () from /usr/lib/libnux-0.9.so.0
 UnityScreen::paintDisplay(CompRegion const&) () from /usr/lib/compiz/libunityshell.so
 UnityWindow::glDraw(GLMatrix const&, GLFragment::Attrib&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libunityshell.so
Title: compiz crashed with SIGSEGV in nux::WindowCompositor::RenderTopViews()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Vish (vish)]

Removed core dump, as bug is now set to public, and cause Sebastien mentions that "The bug is fixed in the vcs and the fix will be in natty when the beta2 freeze relaxes btw"