Comment 4 for bug 659378

StacktraceTop:
 g_object_get_qdata (object=0x15f4f30, quark=887) at /build/buildd/glib2.0-2.26.0/gobject/gobject.c:2727
 get_size_groups (widget=0x15f4f30, requisition=0x7fff466cc230) at /build/buildd/gtk+2.0-2.22.0/gtk/gtksizegroup.c:77
 _gtk_size_group_get_child_requisition (widget=0x15f4f30, requisition=0x7fff466cc230) at /build/buildd/gtk+2.0-2.22.0/gtk/gtksizegroup.c:784
 nautilus_path_bar_size_allocate (widget=<value optimised out>, allocation=<value optimised out>) at nautilus-pathbar.c:670
 g_closure_invoke (closure=0x13da970, return_value=0x0, n_param_values=2, param_values=0x17dd790, invocation_hint=0x7fff466cc3b0) at /build/buildd/glib2.0-2.26.0/gobject/gclosure.c:766