gnome-shell crashed with SIGABRT in g_assertion_message()

[bnw]

I had lost all application items and had an empty side bar post migration.
after running "sudo ln -s /etc/xdg/menus/gnome-applications.menu /etc/xdg/menus/applications.menu" to fix this gnome shell crashed.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: gnome-shell 3.2.1-8ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-7.13-generic 3.2.0-rc7
Uname: Linux 3.2.0-7-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 1.90-0ubuntu1
Architecture: amd64
Date: Thu Dec 29 17:49:28 2011
ExecutablePath: /usr/bin/gnome-shell
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64+mac (20111228)
ProcCmdline: /usr/bin/gnome-shell
Signal: 6
SourcePackage: gnome-shell
StacktraceTop:
 raise () from /lib/x86_64-linux-gnu/libc.so.6
 abort () from /lib/x86_64-linux-gnu/libc.so.6
 g_assertion_message () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_assertion_message_expr () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /usr/lib/gnome-shell/libgnome-shell.so
Title: gnome-shell crashed with SIGABRT in raise()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 g_assertion_message (domain=<optimized out>, file=<optimized out>, line=<optimized out>, func=0x7fe6a318b140 "window_backed_app_get_window", message=0x327a660 "assertion failed: (app->running_state)") at /build/buildd/glib2.0-2.31.4.tested/./glib/gtestutils.c:1810
 g_assertion_message_expr (domain=0x0, file=0x7fe6a318af7c "shell-app.c", line=126, func=0x7fe6a318b140 "window_backed_app_get_window", expr=<optimized out>) at /build/buildd/glib2.0-2.31.4.tested/./glib/gtestutils.c:1821
 window_backed_app_get_window (app=<optimized out>) at shell-app.c:126
 shell_app_launch (app=0x30b0700, timestamp=1727247, uris=0x0, workspace=-1, startup_id=<optimized out>, error=0x7fffd053f078) at shell-app.c:1090
 shell_app_activate_full (app=0x30b0700, workspace=-1, timestamp=1727247) at shell-app.c:571

[Launchpad Janitor (janitor)]

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

[Jeremy Bícha (jbicha)]

Thank you for reporting this bug to Ubuntu. Ubuntu 12.04 LTS reached End of Life in April. See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases

Please upgrade to Ubuntu 16.04 LTS and re-test. If the bug is still reproducible, increase the verbosity of the steps to recreate it so we can try again.

I apologize that we are not always to respond to bug reports promptly. Do feel free to report any other bugs you may find.