compiz crashed with SIGSEGV in nux::NThreadSafeCounter::GetValue() from unity::launcher::LauncherIcon::EmitNeedsRedraw() from unity::launcher::HudLauncherIcon::HudLauncherIcon() from unity::UBusManager::OnCallback()

[Alexandru Cucu]

Compiz crashes when repeatedly trying to open HUD by pressing the <ALT> key.
Can be related to compiz, unity and HUD.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: libnux-2.0-0 2.10.0-0ubuntu1
Uname: Linux 3.3.0-030300rc7-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.0.1-0ubuntu4
Architecture: amd64
Date: Wed Apr 18 19:04:27 2012
ExecutablePath: /usr/bin/compiz
ProcCmdline: compiz
SegvAnalysis:
 Segfault happened at: 0x7f6d05c1b8c0 <_ZNK3nux18NThreadSafeCounter8GetValueEv>: mov (%rdi),%eax
 PC (0x7f6d05c1b8c0) ok
 source "(%rdi)" (0x00000000) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: nux
StacktraceTop:
 nux::NThreadSafeCounter::GetValue() const () from /usr/lib/libnux-core-2.0.so.0
 unity::launcher::LauncherIcon::EmitNeedsRedraw() () from /usr/lib/compiz/libunityshell.so
 ?? () from /usr/lib/compiz/libunityshell.so
 unity::UBusManager::OnCallback(_GVariant*, void*) () from /usr/lib/compiz/libunityshell.so
 ?? () from /usr/lib/compiz/libunityshell.so
Title: compiz crashed with SIGSEGV in nux::NThreadSafeCounter::GetValue()
UpgradeStatus: Upgraded to precise on 2012-04-07 (11 days ago)
UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare vboxusers

[Apport retracing service (apport)]

StacktraceTop:
 nux::NThreadSafeCounter::GetValue (this=0x0) at ./ThreadGNU.cpp:46
 unity::launcher::LauncherIcon::EmitNeedsRedraw (this=0x1b641e0) at /build/buildd/unity-5.10.0/plugins/unityshell/src/LauncherIcon.cpp:1171
 unity::launcher::HudLauncherIcon::HudLauncherIcon(unity::launcher::LauncherHideMode)::{lambda(_GVariant*)#1}::operator()(_GVariant*) const () at /build/buildd/unity-5.10.0/plugins/unityshell/src/HudLauncherIcon.cpp:68
 operator() (_A_a1=@0x7fff238cc338, this=<optimized out>) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:515
 unity::UBusManager::OnCallback (args=0x7f6cf00ab2a0, user_data=<optimized out>) at /build/buildd/unity-5.10.0/plugins/unityshell/src/UBusWrapper.cpp:67

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Will Cooke (willcooke)]

As part of the big bug clear up for 16.04 LTS I am marking this bug as Wont Fix.
These types of crasher are better handled by errors.ubutnu.com which can collate similar crash reports to help us identify persitent bugs rather than one-off crashes.
Sorry we are not able to help with this specific issue. If you are still experiencing this crash, please re-open the bug and add the tag "desktop-bugscrub-reopened". See https://wiki.ubuntu.com/BigDesktopBugScrub for more information.