unity-panel-service crashed with SIGSEGV in g_variant_is_trusted()

[Bowmore]

This bug has been reported ealier but with no crash report but here's one attached.

Problem:
Opening an application, e.g firefox, causes the unity panel to crash. The panel however recovers just to crash again, aso. After a while it stabalizes but just with a few indicators left in the panel.

I removed the package indicator-appmenu and the panel showed up correctly again.

Workaround:
Remove indicator-appmenu

Other:
I've also tried to downgrade libglib-2.0 to version 2.31.20-0ubuntu2 as it is part in the trace but no luck.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity-services 5.6.0-0ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-18.29-generic 3.2.9
Uname: Linux 3.2.0-18-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.94.1-0ubuntu2
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,regex,resize,compiztoolbox,imgpng,move,grid,mousepoll,place,vpswitch,gnomecompat,animation,wall,session,wobbly,workarounds,fade,expo,ezoom,scale,unityshell]
CrashCounter: 1
Date: Thu Mar 15 23:04:49 2012
ExecutablePath: /usr/lib/unity/unity-panel-service
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcCmdline: /usr/lib/unity/unity-panel-service
ProcEnviron:
 SHELL=/bin/bash
 LANGUAGE=sv:en
 LANG=sv_SE.UTF-8
SegvAnalysis:
 Segfault happened at: 0x7f737ace7b92: testb $0x4,0x20(%rdi)
 PC (0x7f737ace7b92) ok
 source "$0x4" ok
 destination "0x20(%rdi)" (0x00000020) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_variant_new_tuple () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? ()
 ?? ()
Title: unity-panel-service crashed with SIGSEGV in g_variant_new_tuple()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin audio cdrom dialout dip fuse libvirtd lpadmin netdev plugdev sambashare sudo video

[Apport retracing service (apport)]

StacktraceTop:
 g_variant_is_trusted (value=0x0) at /build/buildd/glib2.0-2.31.20/./glib/gvariant-core.c:604
 g_variant_new_tuple (children=0x7fff1b76f0c0, n_children=1) at /build/buildd/glib2.0-2.31.20/./glib/gvariant.c:878
 ?? ()
 ?? ()

[Bowmore (bowmore)]

Another workaround:
Downgrade indicator-appmenu to version 0.3.1-0ubuntu2 (oneiric version).

Conclusion:
There's a regression from version 0.3.1-0ubuntu2 to 2.31.20-0ubuntu1

[Bowmore (bowmore)]

The reason why this issue didn't appear for 32-bit was that I hadn't deactivated the globalmenu the same way as for 64-bit.

When I also deactivated it for 32-bit by setting UBUNTU_MENUPROXY=0 this issue appeared.

Probably a dup of bug #953479