gnome-panel crashed with SIGSEGV

StacktraceTop:_gtk_tooltip_handle_event (event=0x85c0d90)
IA__gtk_main_do_event (event=0x85c0d90) at /build/buildd/gtk+2.0-2.12.9/gtk/gtkmain.c:1608
gdk_event_dispatch (source=0x80eb270, callback=0, user_data=0x0)
IA__g_main_context_dispatch (context=0x80ec620)
g_main_context_iterate (context=0x80ec620, block=1, dispatch=1, self=0x80c25b8)

Thanks for your bug report. This bug has been reported to the developers of the software. You can track it and make comments here: http://bugzilla.gnome.org/show_bug.cgi?id=524651

Just mousing over 4 times make it crash

could you give extra details? mouse what over what and where?

I can reproduce this like breefru described. Steps to reproduce :

1. Have compiz enabled
2. Have 5 virtual desktop
3. Put your mouse over the virtual desktop switcher applet and wait for the instructions about how to use virtual Desktop with keyboard to appears.
4. Put your mouse over something else to make this bubble disappears.
5. Repeat 3 and 4, at least 4 time.

Result: Gnome panel crash. You might have to repeat the mentioned steps if it does not crash the first time.

Crash can be triggered when you put your mouse over the virtual switch applet and change the workspace with Ctrl-Alt-Left or Right

Just a side-note, it alse crashes with 4 virtual desktops. Just wait for the balloon to pop-up and switch to another desktop by clicking on it and there she goes...... And indeed its reproducible for just a couple times (i tried it for several times and it looks like it is stable when it crashes three times, after a reboot you can try it again).

I can confirm this problem in Gutsy Beta, clean install.

Aicardi is correct. That does indeed cause the problem.

seems to be due to the libwnck tooltip changes

I am seeing the same behaviour here. I too wondered if it was something to do with the tooltip...

Same here, although I must admit my installation does not contain the latest updates (kind of weird that I'm no longer prompted about this). Will check again when the latest (30 march 2008) updates are applied, if this still happens.

With latest updates installed, this still happens (although I wasn't promted to report the crash this time). Just hover over the Workspace Switcher a few times and boom.

I think my crash came after hovering over the workspace switcher as well. See trace.

https://bugs.edge.launchpad.net/ubuntu/+source/libwnck/+bug/199380 is the same bug and contains a valgrind showing the issue :

==27419== Invalid read of size 4
==27419== at 0x44B87D1: gtk_tooltip_start_delay (gtktooltip.c:1015)
==27419== by 0x44B93DF: _gtk_tooltip_handle_event (gtktooltip.c:1298)
==27419== by 0x43DBCF9: gtk_main_do_event (gtkmain.c:1608)
==27419== by 0x464FA99: gdk_event_dispatch (gdkevents-x11.c:2351)
==27419== by 0x4858D15: g_main_context_dispatch (gmain.c:2003)
==27419== by 0x485C0D2: g_main_context_iterate (gmain.c:2636)
==27419== by 0x485C68D: g_main_context_iteration (gmain.c:2699)
==27419== by 0x751BDF3: processEvents (gconf.c:1886)
==27419== by 0x757B13D: ccsProcessEvents (main.c:1729)
==27419== by 0x7544549: wnck_pager_query_tooltip (in /usr/lib/libwnck-1.so.22.3.6)
==27419== by 0x43E09A3: _gtk_marshal_BOOLEAN__INT_INT_BOOLEAN_OBJECT (gtkmarshalers.c:835)
==27419== by 0x47EE078: g_type_class_meta_marshal (gclosure.c:567)
==27419== by 0x47EF82E: g_closure_invoke (gclosure.c:490)
==27419== by 0x4804119: signal_emit_unlocked_R (gsignal.c:2478)
==27419== by 0x4805946: g_signal_emit_valist (gsignal.c:2209)
==27419== by 0x4805EDF: g_signal_emit_by_name (gsignal.c:2267)
==27419== by 0x44B9275: gtk_tooltip_run_requery (gtktooltip.c:747)
==27419== by 0x44B9485: _gtk_tooltip_handle_event (gtktooltip.c:1256)
==27419== by 0x43DBCF9: gtk_main_do_event (gtkmain.c:1608)
==27419== by 0x464FA99: gdk_event_dispatch (gdkevents-x11.c:2351)
==27419== by 0x4858D15: g_main_context_dispatch (gmain.c:2003)
==27419== by 0x485C0D2: g_main_context_iterate (gmain.c:2636)
==27419== by 0x485C68D: g_main_context_iteration (gmain.c:2699)
==27419== by 0x751BDF3: processEvents (gconf.c:1886)
==27419== by 0x757B13D: ccsProcessEvents (main.c:1729)
==27419== by 0x7544549: wnck_pager_query_tooltip (in /usr/lib/libwnck-1.so.22.3.6)
==27419== by 0x43E09A3: _gtk_marshal_BOOLEAN__INT_INT_BOOLEAN_OBJECT (gtkmarshalers.c:835)
==27419== by 0x47EE078: g_type_class_meta_marshal (gclosure.c:567)
==27419== by 0x47EF82E: g_closure_invoke (gclosure.c:490)
==27419== by 0x4804119: signal_emit_unlocked_R (gsignal.c:2478)
==27419== by 0x4805946: g_signal_emit_valist (gsignal.c:2209)
==27419== by 0x4805EDF: g_signal_emit_by_name (gsignal.c:2267)
==27419== by 0x44B9275: gtk_tooltip_run_requery (gtktooltip.c:747)
==27419== by 0x44B9485: _gtk_tooltip_handle_event (gtktooltip.c:1256)
==27419== by 0x43DBCF9: gtk_main_do_event (gtkmain.c:1608)
==27419== by 0x464FA99: gdk_event_dispatch (gdkevents-x11.c:2351)
==27419== by 0x4858D15: g_main_context_dispatch (gmain.c:2003)
==27419== by 0x485C0D2: g_main_context_iterate (gmain.c:2636)
==27419== by 0x485C68D: g_main_context_iteration (gmain.c:2699)
==27419== by 0x751BDF3: processEvents (gconf.c:1886)
==27419== Address 0x48 is not stack'd, malloc'd or (recently) free'd

i am having the same problem, just switching desk tops fast can cause it to crash.

the bug is already milestoned, no need to add extra tags there

i am having the same problem after upgrading to hardy heron beta.

This bug was fixed in the package libwnck - 2.22.0-0ubuntu3

---------------
libwnck (2.22.0-0ubuntu3) hardy; urgency=low

  * debian/control.in:
    - don't build using libcompizconfig
  * debian/patches/02_expose_wm_keybindings.patch:
    - drop the ubuntu changes adding the keyboard shortcuts to the
      workspace switcher tooltip for hardy, the implementation has some issues
      which will be worked next cycle (lp: #204994, #207693)
  * debian/patches/90_autoreconf_update.patch:
    - don't update the autotools not required now
  * debian/pixmaps:
    - the compiz icons are not required now
  * debian/rules:
    - don't install the icons which are not required now
  * debian/patches/80_from_bugzilla_add_action_above.patch:
    - drop change which should not be required

 -- Sebastien Bacher <email address hidden> Tue, 01 Apr 2008 21:13:26 +0200

It still happenes here...
2.22.0-0ubuntu3 <-- I checked my system and I'm running this update.

Thanks

same happens to me.
updates till now (5th april 2008 - 01:30)

system info > see profile