Comment 5 for bug 977938

I just tested with the devel version of inkscape (from Archlinux's AUR - 0.48+devel r11233), and strangely enough, the crash occurs only after repeating the operation twice.
I mean :
1. Click add a new layer
2. Cancel
3. Click add a new layer, again
4. Cancel
=> crash.

As far as I can see, the crash output is the same, except the 2 last lines :

#0 0x00007ffff1835678 in __dynamic_cast () from /usr/lib/libstdc++.so.6
#1 0x00007ffff6d4249f in Gtk::Container_Class::forall_vfunc_callback(_GtkContainer*, int, void (*)(_GtkWidget*, void*), void*) () from /usr/lib/libgtkmm-2.4.so.1
#2 0x00007ffff5cefec5 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#3 0x00007ffff5cf205b in gtk_widget_queue_draw () from /usr/lib/libgtk-x11-2.0.so.0
#4 0x00007fffea966860 in Oxygen::WidgetStateData::delayedUpdate(void*) ()
   from /usr/lib/gtk-2.0/2.10.0/engines/liboxygen-gtk.so
#5 0x00007fffea960eed in Oxygen::TimeLine::update() () from /usr/lib/gtk-2.0/2.10.0/engines/liboxygen-gtk.so
#6 0x00007fffea961609 in Oxygen::TimeLineServer::update(void*) ()
   from /usr/lib/gtk-2.0/2.10.0/engines/liboxygen-gtk.so
#7 0x00007ffff1b2309b in ?? () from /usr/lib/libglib-2.0.so.0
#8 0x00007ffff1b218bd in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#9 0x00007ffff1b220b8 in ?? () from /usr/lib/libglib-2.0.so.0
#10 0x00007ffff1b225f2 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#11 0x00007ffff5bce637 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#12 0x00000000006a2fdb in sp_main_gui(int, char const**) ()
#13 0x00007ffff1164455 in __libc_start_main () from /lib/libc.so.6
#14 0x00000000006a0601 in _start ()