Under "random" circumstances (ie. no clear reproducer), wnck-applet segfaults, as in the upstream bug: http://bugzilla.gnome.org/show_bug.cgi?id=139080 gnome-panel-2.8.1-3.3E GNU gdb Red Hat Linux (6.3.0.0-1.96rh) Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-redhat-linux-gnu". Attaching to process 5741 Reading symbols from /usr/libexec/wnck-applet... warning: the debug information found in "/usr/lib/debug//usr/libexec/wnck-applet.debug" does not match "/usr/libexec/wnck-applet" (CRC mismatch). (no debugging symbols found)...done. Using host libthread_db library "/lib/tls/libthread_db.so.1". Reading symbols from /usr/lib/libpanel-applet-2.so.0... warning: the debug information found in "/usr/lib/debug//usr/lib/libpanel-applet-2.so.0.0.19.debug" does not match "/usr/lib/libpanel-applet-2.so.0" (CRC mismatch). (no debugging symbols found)...done. Loaded symbols for /usr/lib/libpanel-applet-2.so.0 Reading symbols from /usr/lib/libwnck-1.so.4...Reading symbols from /usr/lib/debug/usr/lib/libwnck-1.so.4.9.0.debug...done. done. Loaded symbols for /usr/lib/libwnck-1.so.4 Reading symbols from /usr/lib/libglade-2.0.so.0...done. Loaded symbols for /usr/lib/libglade-2.0.so.0 Reading symbols from /usr/lib/libgnome-desktop-2.so.2...done. Loaded symbols for /usr/lib/libgnome-desktop-2.so.2 Reading symbols from /usr/lib/libgnomeui-2.so.0...done. Loaded symbols for /usr/lib/libgnomeui-2.so.0 Reading symbols from /usr/X11R6/lib/libSM.so.6...done. Loaded symbols for /usr/X11R6/lib/libSM.so.6 Reading symbols from /usr/X11R6/lib/libICE.so.6...done. Loaded symbols for /usr/X11R6/lib/libICE.so.6 Reading symbols from /usr/lib/libstartup-notification-1.so.0...done. Loaded symbols for /usr/lib/libstartup-notification-1.so.0 Reading symbols from /usr/lib/libbonoboui-2.so.0...done. Loaded symbols for /usr/lib/libbonoboui-2.so.0 Reading symbols from /usr/lib/libxml2.so.2...done. Loaded symbols for /usr/lib/libxml2.so.2 Reading symbols from /lib/tls/libpthread.so.0...done. [Thread debugging using libthread_db enabled] [New Thread -1208785216 (LWP 5741)] Loaded symbols for /lib/tls/libpthread.so.0 Reading symbols from /usr/lib/libz.so.1...done. Loaded symbols for /usr/lib/libz.so.1 Reading symbols from /usr/lib/libgnomecanvas-2.so.0...done. Loaded symbols for /usr/lib/libgnomecanvas-2.so.0 Reading symbols from /usr/lib/libgnome-2.so.0...done. Loaded symbols for /usr/lib/libgnome-2.so.0 Reading symbols from /usr/lib/libpopt.so.0...done. Loaded symbols for /usr/lib/libpopt.so.0 Reading symbols from /usr/lib/libart_lgpl_2.so.2...done. Loaded symbols for /usr/lib/libart_lgpl_2.so.2 Reading symbols from /usr/lib/libpangoft2-1.0.so.0...done. Loaded symbols for /usr/lib/libpangoft2-1.0.so.0 Reading symbols from /usr/lib/libgtk-x11-2.0.so.0...Reading symbols from /usr/lib/debug/usr/lib/libgtk-x11-2.0.so.0.400.13.debug...done. done. Loaded symbols for /usr/lib/libgtk-x11-2.0.so.0 Reading symbols from /usr/lib/libgdk-x11-2.0.so.0...Reading symbols from /usr/lib/debug/usr/lib/libgdk-x11-2.0.so.0.400.13.debug...done. done. Loaded symbols for /usr/lib/libgdk-x11-2.0.so.0 Reading symbols from /usr/lib/libatk-1.0.so.0...done. Loaded symbols for /usr/lib/libatk-1.0.so.0 Reading symbols from /usr/lib/libgdk_pixbuf-2.0.so.0...Reading symbols from /usr/lib/debug/usr/lib/libgdk_pixbuf-2.0.so.0.400.13.debug...done. done. Loaded symbols for /usr/lib/libgdk_pixbuf-2.0.so.0 Reading symbols from /usr/lib/libpangoxft-1.0.so.0...done. Loaded symbols for /usr/lib/libpangoxft-1.0.so.0 Reading symbols from /usr/lib/libpangox-1.0.so.0...done. Loaded symbols for /usr/lib/libpangox-1.0.so.0 Reading symbols from /usr/lib/libpango-1.0.so.0...done. Loaded symbols for /usr/lib/libpango-1.0.so.0 Reading symbols from /usr/lib/libgobject-2.0.so.0...Reading symbols from /usr/lib/debug/usr/lib/libgobject-2.0.so.0.400.7.debug...done. done. Loaded symbols for /usr/lib/libgobject-2.0.so.0 Reading symbols from /usr/lib/libbonobo-2.so.0...done. Loaded symbols for /usr/lib/libbonobo-2.so.0 Reading symbols from /usr/lib/libgconf-2.so.4...done. Loaded symbols for /usr/lib/libgconf-2.so.4 Reading symbols from /usr/lib/libgnomevfs-2.so.0...done. Loaded symbols for /usr/lib/libgnomevfs-2.so.0 Reading symbols from /usr/lib/libbonobo-activation.so.4...done. Loaded symbols for /usr/lib/libbonobo-activation.so.4 Reading symbols from /usr/lib/libORBit-2.so.0...done. Loaded symbols for /usr/lib/libORBit-2.so.0 Reading symbols from /lib/tls/libm.so.6...done. Loaded symbols for /lib/tls/libm.so.6 Reading symbols from /usr/lib/libgmodule-2.0.so.0...Reading symbols from /usr/lib/debug/usr/lib/libgmodule-2.0.so.0.400.7.debug...done. done. Loaded symbols for /usr/lib/libgmodule-2.0.so.0 Reading symbols from /lib/libdl.so.2...done. Loaded symbols for /lib/libdl.so.2 Reading symbols from /usr/lib/libgthread-2.0.so.0...Reading symbols from /usr/lib/debug/usr/lib/libgthread-2.0.so.0.400.7.debug...done. done. Loaded symbols for /usr/lib/libgthread-2.0.so.0 Reading symbols from /usr/lib/libglib-2.0.so.0...Reading symbols from /usr/lib/debug/usr/lib/libglib-2.0.so.0.400.7.debug...done. done. Loaded symbols for /usr/lib/libglib-2.0.so.0 Reading symbols from /lib/tls/libc.so.6...done. Loaded symbols for /lib/tls/libc.so.6 Reading symbols from /usr/X11R6/lib/libX11.so.6...done. Loaded symbols for /usr/X11R6/lib/libX11.so.6 Reading symbols from /usr/X11R6/lib/libXRes.so.1...done. Loaded symbols for /usr/X11R6/lib/libXRes.so.1 Reading symbols from /usr/X11R6/lib/libXext.so.6...done. Loaded symbols for /usr/X11R6/lib/libXext.so.6 Reading symbols from /usr/lib/libgnome-keyring.so.0...done. Loaded symbols for /usr/lib/libgnome-keyring.so.0 Reading symbols from /usr/lib/libjpeg.so.62...done. Loaded symbols for /usr/lib/libjpeg.so.62 Reading symbols from /lib/ld-linux.so.2...done. Loaded symbols for /lib/ld-linux.so.2 Reading symbols from /usr/lib/libesd.so.0...done. Loaded symbols for /usr/lib/libesd.so.0 Reading symbols from /usr/lib/libaudiofile.so.0...done. Loaded symbols for /usr/lib/libaudiofile.so.0 Reading symbols from /usr/lib/libfontconfig.so.1...done. Loaded symbols for /usr/lib/libfontconfig.so.1 Reading symbols from /usr/lib/libfreetype.so.6...done. Loaded symbols for /usr/lib/libfreetype.so.6 Reading symbols from /usr/X11R6/lib/libXrandr.so.2...done. Loaded symbols for /usr/X11R6/lib/libXrandr.so.2 Reading symbols from /usr/X11R6/lib/libXi.so.6...done. Loaded symbols for /usr/X11R6/lib/libXi.so.6 Reading symbols from /usr/X11R6/lib/libXinerama.so.1...done. Loaded symbols for /usr/X11R6/lib/libXinerama.so.1 Reading symbols from /usr/X11R6/lib/libXft.so.2...done. Loaded symbols for /usr/X11R6/lib/libXft.so.2 Reading symbols from /usr/X11R6/lib/libXcursor.so.1...done. Loaded symbols for /usr/X11R6/lib/libXcursor.so.1 Reading symbols from /usr/X11R6/lib/libXrender.so.1...done. Loaded symbols for /usr/X11R6/lib/libXrender.so.1 Reading symbols from /usr/lib/libORBitCosNaming-2.so.0...done. Loaded symbols for /usr/lib/libORBitCosNaming-2.so.0 Reading symbols from /lib/libssl.so.4...done. Loaded symbols for /lib/libssl.so.4 Reading symbols from /lib/libcrypto.so.4...done. Loaded symbols for /lib/libcrypto.so.4 Reading symbols from /usr/lib/libgssapi_krb5.so.2...done. Loaded symbols for /usr/lib/libgssapi_krb5.so.2 Reading symbols from /usr/lib/libkrb5.so.3...done. Loaded symbols for /usr/lib/libkrb5.so.3 Reading symbols from /lib/libcom_err.so.2...done. Loaded symbols for /lib/libcom_err.so.2 Reading symbols from /usr/lib/libk5crypto.so.3...done. Loaded symbols for /usr/lib/libk5crypto.so.3 Reading symbols from /lib/libresolv.so.2...done. Loaded symbols for /lib/libresolv.so.2 Reading symbols from /lib/tls/librt.so.1...done. Loaded symbols for /lib/tls/librt.so.1 Reading symbols from /lib/libasound.so.2...done. Loaded symbols for /lib/libasound.so.2 Reading symbols from /usr/lib/libexpat.so.0...done. Loaded symbols for /usr/lib/libexpat.so.0 Reading symbols from /usr/X11R6/lib/X11/locale/lib/common/xlcUTF8Load.so.2...done. Loaded symbols for /usr/X11R6/lib/X11/locale/lib/common/xlcUTF8Load.so.2 Reading symbols from /usr/lib/gconv/ISO8859-1.so...done. Loaded symbols for /usr/lib/gconv/ISO8859-1.so Reading symbols from /usr/lib/gtk-2.0/2.4.0/engines/libbluecurve.so...done. Loaded symbols for /usr/lib/gtk-2.0/2.4.0/engines/libbluecurve.so Reading symbols from /usr/lib/pango/1.4.0/modules/pango-basic-fc.so...done. Loaded symbols for /usr/lib/pango/1.4.0/modules/pango-basic-fc.so Reading symbols from /usr/lib/gtk-2.0/2.4.0/loaders/libpixbufloader-png.so...Reading symbols from /usr/lib/debug/usr/lib/gtk-2.0/2.4.0/loaders/libpixbufloader-png.so.debug...done. done. Loaded symbols for /usr/lib/gtk-2.0/2.4.0/loaders/libpixbufloader-png.so Reading symbols from /usr/lib/libpng12.so.0...done. Loaded symbols for /usr/lib/libpng12.so.0 0x008157a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2 (gdb) continue Continuing. Program received signal SIGSEGV, Segmentation fault. [Switching to Thread -1208785216 (LWP 5741)] handlers_find (instance=0x0, mask=4294967271, signal_id=0, detail=0, closure=0x0, func=0x364217, data=0x9a1ece8, one_and_only=0) at gsignal.c:508 508 if (!node->c_marshaller) (gdb) thread apply all bt Thread 1 (Thread -1208785216 (LWP 5741)): #0 handlers_find (instance=0x0, mask=4294967271, signal_id=0, detail=0, closure=0x0, func=0x364217, data=0x9a1ece8, one_and_only=0) at gsignal.c:508 #1 0x00c404e6 in signal_handlers_foreach_matched_R (instance=0x9b21570, mask=10, signal_id=0, detail=0, closure=0x0, func=0x0, data=0x0, callback=0xc3f847 <g_signal_handler_disconnect>) at gsignal.c:1846 #2 0x00c40bab in g_signal_handlers_disconnect_matched (instance=0x9b21570, mask=24, signal_id=0, detail=0, closure=0x0, func=0x0, data=0x0) at gsignal.c:1931 #3 0x00364430 in gtk_tooltips_widget_remove (widget=0x0, data=0x9a1ece8) at gtktooltips.c:140 #4 0x00c440ae in g_cclosure_marshal_VOID__VOID (closure=0x9b17c50, return_value=0x0, n_param_values=1, param_values=0x0, invocation_hint=0xbff430c8, marshal_data=0x0) at gmarshal.c:77 #5 0x00c2c347 in g_closure_invoke (closure=0x9b17c50, return_value=0x0, n_param_values=0, param_values=0x0, invocation_hint=0x0) at gclosure.c:437 #6 0x00c4194e in signal_emit_unlocked_R (node=0x9838678, detail=0, instance=0x9b21570, emission_return=0x0, instance_and_params=0xbff431f0) at gsignal.c:2435 #7 0x00c439bc in g_signal_emit_valist (instance=0x9b21570, signal_id=1, detail=0, var_args=0xbff4337c "\027.-") at gsignal.c:2194 #8 0x00c43c5a in g_signal_emit (instance=0x0, signal_id=0, detail=0) at gsignal.c:2238 #9 0x002d2e5d in gtk_object_dispose (gobject=0x9b21570) at gtkobject.c:376 #10 0x003ae3ca in gtk_widget_dispose (object=0x9b21570) at gtkwidget.c:6386 #11 0x00c2ea0f in g_object_run_dispose (object=0x9b21570) at gobject.c:602 #12 0x002d2de8 in gtk_object_destroy (object=0x9b21570) at gtkobject.c:361 #13 0x003a8383 in gtk_widget_destroy (widget=0x9b21570) at gtkwidget.c:1913 #14 0x00d00d84 in wnck_task_finalize (object=0x9b15b08) at tasklist.c:384 #15 0x00c2e8dc in g_object_unref (_object=0x9b15b08) at gobject.c:570 #16 0x00d00878 in wnck_tasklist_remove (container=0x98c8550, widget=0x9b21570) at tasklist.c:1284 #17 0x00c44c3f in g_cclosure_marshal_VOID__OBJECT (closure=0x986a550, return_value=0x0, n_param_values=2, param_values=0xbff43850, invocation_hint=0xbff43728, marshal_data=0xd0069b) at gmarshal.c:636 #18 0x00c2c6b2 in g_type_class_meta_marshal (closure=0x986a550, return_value=0x0, n_param_values=0, param_values=0xbff43850, invocation_hint=0x0, marshal_data=0x0) at gclosure.c:514 #19 0x00c2c347 in g_closure_invoke (closure=0x986a550, return_value=0x0, n_param_values=0, param_values=0x0, invocation_hint=0x0) at gclosure.c:437 #20 0x00c41616 in signal_emit_unlocked_R (node=0x986a598, detail=0, instance=0x98c8550, emission_return=0x0, instance_and_params=0xbff43850) at gsignal.c:2365 #21 0x00c439bc in g_signal_emit_valist (instance=0x98c8550, signal_id=1, detail=0, var_args=0xbff439e0 "p\025²\t¸K²\t\030u#") at gsignal.c:2194 #22 0x00c43c5a in g_signal_emit (instance=0x0, signal_id=0, detail=0) at gsignal.c:2238 #23 0x00237654 in gtk_container_remove (container=0x98c8550, widget=0x9b21570) at gtkcontainer.c:994 #24 0x003ae3dd in gtk_widget_dispose (object=0x9b21570) at gtkwidget.c:6380 #25 0x00c2ea0f in g_object_run_dispose (object=0x9b21570) at gobject.c:602 #26 0x002d2de8 in gtk_object_destroy (object=0x9b21570) at gtkobject.c:361 #27 0x003a8383 in gtk_widget_destroy (widget=0x9b21570) at gtkwidget.c:1913 #28 0x00d02e50 in wnck_tasklist_update_lists (tasklist=0x98c8550) at tasklist.c:1445 #29 0x00d03782 in do_wnck_tasklist_update_lists (data=0x0) at tasklist.c:1768 #30 0x00bcca98 in g_idle_dispatch (source=0x9b24bb8, callback=0xa, user_data=0x0) at gmain.c:3806 #31 0x00bc974b in g_main_context_dispatch (context=0x9855ad8) at gmain.c:1942 #32 0x00bcb1d2 in g_main_context_iterate (context=0x9855ad8, block=1, dispatch=1, self=0x9836378) at gmain.c:2573 #33 0x00bcb47f in g_main_loop_run (loop=0x9842bf8) at gmain.c:2777 #34 0x038c4dd5 in bonobo_main () from /usr/lib/libbonobo-2.so.0 #35 0x038c3034 in bonobo_generic_factory_main_timeout () from /usr/lib/libbonobo-2.so.0 #36 0x038c30b8 in bonobo_generic_factory_main () from /usr/lib/libbonobo-2.so.0 #37 0x00cc2f50 in panel_applet_factory_main_closure () from /usr/lib/libpanel-applet-2.so.0 #38 0x00cc3076 in panel_applet_factory_main () from /usr/lib/libpanel-applet-2.so.0 #39 0x0804e2aa in main () (gdb) quit The program is running. Quit anyway (and detach it)? (y or n) Detaching from program: /usr/libexec/wnck-applet, process 5741
Note that this warning: warning: the debug information found in "/usr/lib/debug//usr/libexec/wnck-applet.debug" does not match "/usr/libexec/wnck-applet" (CRC mismatch). shouldn't have much consequence on the backtrace gathered, as all the logic of the wnck-applet is in libwnck.
Created attachment 131937 [details] nullify button before calling destroy here's an untested patch for the type of change I mentioned in comment 4. I'm a bit busy with RHEL5 work right now, but if someone wants to try this before I have more time to investigate, it might fix the problem. (sorry for the delay in the ping, by the way. I've been at a conference in Spain)
Created attachment 133585 [details] latest stack trace from most recent libwnck packages
Created attachment 134143 [details] metacity debug
Created attachment 134212 [details] metacity log
Created attachment 135568 [details] gdb output
Created attachment 135569 [details] second gdb output
The component this request has been filed against is not planned for inclusion in the next update. The decision is based on weighting the priority and number of requests for a component as well as the impact on the Red Hat Enterprise Linux user-base: other components are considered having higher priority and the number of changes we intend to include in update cycles is limited.
Product Management has reviewed and declined this request. You may appeal this decision by reopening this request.
Reopening
Created attachment 135848 [details] more gdb error output from the applet failing
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release.
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2007-0775.html