gnome-panel crashed with SIGSEGV in gtk_tree_view_column_setup_sort_column_id_callback()

[Hanine HAMZIOUI]

Log in to Gnome classic. Logout, the gnome-panel crashes!
Right after, login to Unity, click report crash report --> relaunch --> the gnome-panel takes over lightdm.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: gnome-panel 1:3.3.91-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-18.28-generic 3.2.9
Uname: Linux 3.2.0-18-generic x86_64
ApportVersion: 1.94-0ubuntu1
Architecture: amd64
Date: Tue Mar 6 05:23:20 2012
ExecutablePath: /usr/bin/gnome-panel
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcCmdline: gnome-panel
SegvAnalysis:
 Segfault happened at: 0x7fe839c83c75: mov 0x78(%rax),%edx
 PC (0x7fe839c83c75) ok
 source "0x78(%rax)" (0xaaaaaaaaaaaaab22) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: gnome-panel
StacktraceTop:
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: gnome-panel crashed with SIGSEGV in g_signal_emit_valist()
UpgradeStatus: Upgraded to precise on 2012-03-02 (3 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 gtk_tree_view_column_setup_sort_column_id_callback (tree_column=0x25d5400) at /build/buildd/gtk+3.0-3.3.18/./gtk/gtktreeviewcolumn.c:1267
 _g_closure_invoke_va (closure=0x7fe839c86a3c, return_value=0x0, instance=0x7fe8381f64c0, args=0x7fffdc9bd7d8, n_params=0, param_types=<optimized out>) at /build/buildd/glib2.0-2.31.20/./gobject/gclosure.c:840
 g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=0, var_args=<optimized out>) at /build/buildd/glib2.0-2.31.20/./gobject/gsignal.c:3206
 g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.31.20/./gobject/gsignal.c:3352
 gtk_ui_manager_buildable_custom_tag_end (buildable=0x26087e0, builder=<optimized out>, child=<optimized out>, tagname=<optimized out>, data=0x4e) at /build/buildd/gtk+3.0-3.3.18/./gtk/gtkuimanager.c:3333

[Launchpad Janitor (janitor)]

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

[Sasa Paporovic (melchiaros)]

Miguel A. Lopez-Molina wrote in

https://bugs.launchpad.net/ubuntu/+source/gnome-panel/+bug/945993
----------------------------------------------------------------------------------------------------:

Testing Ubuntu 12.04 Beta 1 on a VM (Virtualbox), I installed GNOME Shell (gnome-shell 3.2.2.1-0ubuntu1) from the Ubuntu Software Center. I then logged off and proceeded to test the Gnome Shell environment and, later, Gnome Classic.

I eventually returned to Unity 3D and walked away from my computer for a few minutes. When I returned I found the following crash message: gnome-panel crashed with SIGSEGV in g_closure_invoke()

When I chose to relaunch gnome-panel, both CLASSIC gnome panels (top and bottom) were launched instead of just the top one from Unity. The top panel shows the classic menus (Applications, Places) and the bottom one has the 'show desktop' and 'change workspace' buttons, and open application windows minimise to it as expected. I still have a fully functional Unity launcher.

gnome-panel shouldn't crash, and if it does, the proper gnome-panel should be relaunched i.e. the one that matches its "environment" (Unity, Gnome Shell, Gnome Classic, etc.)

Ubuntu precise beta 1
gnome-panel 1:3.3.90-0ubuntu1