compiz crashed with SIGSEGV in unity::panel::Style::GetStyleContext()

[Dale Beaudoin]

I was unpluging the Unity Plugin in CCSM while operating under the Gnome Classic desktop in the process of testing and validating another bug report on Ubuntuforums. The above report had been generated:, crash , but firefox still functional - no desktop menus.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity 5.2.0-0ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-15.24-generic-pae 3.2.5
Uname: Linux 3.2.0-15-generic-pae i686
NonfreeKernelModules: nvidia
ApportVersion: 1.91-0ubuntu1
Architecture: i386
CrashCounter: 1
Date: Tue Feb 14 12:14:54 2012
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20110901)
ProcCmdline: /usr/bin/compiz
SegvAnalysis:
 Segfault happened at: 0xb388e0b4 <_ZN5unity5panel5Style15GetStyleContextEv+4>: mov 0x8(%eax),%eax
 PC (0xb388e0b4) ok
 source "0x8(%eax)" (0x00000008) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 unity::panel::Style::GetStyleContext() () from /usr/lib/compiz/libunityshell.so
 unity::PanelMenuView::DrawText(_cairo*, int&, int, int, int, char const*, char const*, int) () from /usr/lib/compiz/libunityshell.so
 unity::PanelMenuView::Refresh() () from /usr/lib/compiz/libunityshell.so
 unity::PanelMenuView::OnActiveWindowChanged(_BamfMatcher*, _BamfView*, _BamfView*) () from /usr/lib/compiz/libunityshell.so
 sigc::internal::slot_call3<sigc::bound_mem_functor3<void, unity::PanelMenuView, _BamfMatcher*, _BamfView*, _BamfView*>, void, _BamfMatcher*, _BamfView*, _BamfView*>::call_it(sigc::internal::slot_rep*, _BamfMatcher* const&, _BamfView* const&, _BamfView* const&) () from /usr/lib/compiz/libunityshell.so
Title: compiz crashed with SIGSEGV in unity::panel::Style::GetStyleContext()
UpgradeStatus: Upgraded to precise on 2011-11-30 (75 days ago)
UserGroups: adm lpadmin sambashare sudo

[Bilal Akhtar (bilalakhtar)]

Please don't fiddle around with bug tags. Feel free to add new ones but don't remove old ones.

We NEED a retrace of this bug, so I'm re-adding the appropriate bug tags to this bug

And marking it private again, because this bug contains CoreDump.gz and the bug should remain private until the retracer is run and the CoreDump is deleted.

[Apport retracing service (apport)]

StacktraceTop:
 unity::panel::Style::GetStyleContext (this=0x0) at /build/buildd/unity-5.2.0/plugins/unityshell/src/PanelStyle.cpp:130
 unity::PanelMenuView::DrawText (this=0x9bbb870, cr_real=0xaa61800, x=@0xbfee2b38, y=0, width=1159, height=24, font_desc=0x0, label=0xa53b520 "<b>Firefox Web Browser</b>", increase_size=0) at /build/buildd/unity-5.2.0/plugins/unityshell/src/PanelMenuView.cpp:814
 unity::PanelMenuView::Refresh (this=0x9bbb870) at /build/buildd/unity-5.2.0/plugins/unityshell/src/PanelMenuView.cpp:898
 unity::PanelMenuView::OnActiveWindowChanged (this=0x9bbb870, matcher=0x9846d40, old_view=0x95cfb18, new_view=0x95cf958) at /build/buildd/unity-5.2.0/plugins/unityshell/src/PanelMenuView.cpp:1128
 operator() (this=0x9bbe1ac, _A_a1=<optimized out>, _A_a2=<optimized out>, _A_a3=<optimized out>) at /usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:1985