libnotify-0.4.4-10.fc9.x86_64 The original patch for notifications in gnome-user-share did: notify_notification_add_action (notification, "display", _("Open File"), notify_notification_add_action (notification, "display", _("Open File"), (NotifyActionCallback) notification_launch_action_on_file_cb, (gpointer) file_uri, (GFreeFunc) g_free); notify_notification_add_action (notification, "reveal", _("Reveal File"), (NotifyActionCallback) notification_launch_action_on_file_cb, (gpointer) file_uri, (GFreeFunc) g_free); This will crash in libnotify: ==3954== Invalid free() / delete / delete[] ==3954== at 0x4A0609F: free (vg_replace_malloc.c:323) ==3954== by 0x3EF1603637: (within /usr/lib64/libnotify.so.1.1.2) ==3954== by 0x30B2C29891: g_hash_table_remove_node (ghash.c:204) ==3954== by 0x30B2C2990C: g_hash_table_remove_all_nodes (ghash.c:231) ==3954== by 0x30B2C2A4F9: g_hash_table_remove_all (ghash.c:914) ==3954== by 0x30B2C2A604: g_hash_table_destroy (ghash.c:639) ==3954== by 0x3EF16056AC: (within /usr/lib64/libnotify.so.1.1.2) ==3954== by 0x30B380D6A7: g_object_unref (gobject.c:1793) ==3954== by 0x3D53211893: (within /usr/lib64/libdbus-glib-1.so.2.1.0) ==3954== by 0x30B380B6DC: g_closure_invoke (gclosure.c:490) ==3954== by 0x30B381F6C0: signal_emit_unlocked_R (gsignal.c:2440) ==3954== by 0x30B3820B9B: g_signal_emit_valist (gsignal.c:2199) ==3954== Address 0x4dd5d60 is 0 bytes inside a block of size 51 free'd ==3954== at 0x4A0609F: free (vg_replace_malloc.c:323) ==3954== by 0x3EF1603637: (within /usr/lib64/libnotify.so.1.1.2) ==3954== by 0x30B2C29891: g_hash_table_remove_node (ghash.c:204) ==3954== by 0x30B2C2990C: g_hash_table_remove_all_nodes (ghash.c:231) ==3954== by 0x30B2C2A4F9: g_hash_table_remove_all (ghash.c:914) ==3954== by 0x30B2C2A604: g_hash_table_destroy (ghash.c:639) ==3954== by 0x3EF16056AC: (within /usr/lib64/libnotify.so.1.1.2) ==3954== by 0x30B380D6A7: g_object_unref (gobject.c:1793) ==3954== by 0x3D53211893: (within /usr/lib64/libdbus-glib-1.so.2.1.0) ==3954== by 0x30B380B6DC: g_closure_invoke (gclosure.c:490) ==3954== by 0x30B381F6C0: signal_emit_unlocked_R (gsignal.c:2440) ==3954== by 0x30B3820B9B: g_signal_emit_valist (gsignal.c:2199) libnotify doesn't realise that the 2 user_data are the same, and tries to free it twice. The work-around is to duplicate the data for one of the calls. Original patch is at: http://bugzilla.gnome.org/show_bug.cgi?id=534794#c5 http://bugzilla.gnome.org/show_bug.cgi?id=534794
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Probably still a problem.
Matthias was right about the problem being in our code. The destructor will be run twice, and that's our fault.