compiz crashed with SIGSEGV in nux::WindowThread::IsInsideLayoutCycle()

[Prakash]

Compiz and Emerald crashes very often. Neither screen resolution of external monitor doesnt sets to 1280 x 1024

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: libnux-0.9-0 0.9.44-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
Date: Fri Apr 15 18:26:05 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu-Netbook 10.04 "Lucid Lynx" - Release i386 (20100429.4)
ProcCmdline: compiz --replace
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, no user)
 LANG=en_CA.UTF-8
 LC_MESSAGES=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x1c318c7 <_ZNK3nux12WindowThread19IsInsideLayoutCycleEv+7>: movzbl 0x128(%eax),%eax
 PC (0x01c318c7) ok
 source "0x128(%eax)" (0x00000128) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: nux
StacktraceTop:
 nux::WindowThread::IsInsideLayoutCycle() const () from /usr/lib/libnux-0.9.so.0
 nux::Area::InitiateResizeLayout(nux::Area*) () from /usr/lib/libnux-0.9.so.0
 nux::Area::SetMinimumWidth(int) () from /usr/lib/libnux-0.9.so.0
 PanelIndicatorObjectEntryView::Refresh() () from /usr/lib/compiz/libunityshell.so
 sigc::internal::slot_call0<sigc::bound_mem_functor0<void, PanelIndicatorObjectEntryView>, void>::call_it(sigc::internal::slot_rep*) () from /usr/lib/compiz/libunityshell.so
Title: compiz crashed with SIGSEGV in nux::WindowThread::IsInsideLayoutCycle()
UpgradeStatus: Upgraded to natty on 2011-04-13 (2 days ago)
UserGroups: adm admin audio cdrom dialout dip fax floppy fuse lpadmin netdev nopasswdlogin plugdev powerdev sambashare tape video

[Apport retracing service (apport)]

StacktraceTop:
 nux::WindowThread::IsInsideLayoutCycle (this=0x0) at ./WindowThread.cpp:767
 IsComputingLayout (this=0xb5364348, child=0x0) at ./WindowThread.h:175
 nux::Area::InitiateResizeLayout (this=0xb5364348, child=0x0) at ./Area.cpp:412
 nux::Area::SetMinimumWidth (this=0xb5364348, w=28) at ./Area.cpp:218
 PanelIndicatorObjectEntryView::Refresh (this=0xb5364348) at /build/buildd/unity-3.8.8/src/PanelIndicatorObjectEntryView.cpp:225

[Jason Smith (jassmith)]

Steps to reproduce this issue would be incredibly helpful