Comment 2 for bug 1212279

StacktraceTop:
 IA__gtk_tree_model_get_valist (tree_model=tree_model@entry=0x2d58410, iter=iter@entry=0x7fffd4bd1070, var_args=var_args@entry=0x7fffd4bd0f18) at /build/buildd/gtk+2.0-2.24.20/gtk/gtktreemodel.c:1470
 IA__gtk_tree_model_get (tree_model=0x2d58410, iter=0x7fffd4bd1070) at /build/buildd/gtk+2.0-2.24.20/gtk/gtktreemodel.c:1432
 combo_box_row_separator_func (model=<optimized out>, iter=<optimized out>, user_data=<optimized out>) at /build/buildd/gtk+2.0-2.24.20/gtk/gtkfilechooserbutton.c:2365
 tree_column_row_is_sensitive (combo_box=combo_box@entry=0x2bcc6b0, iter=iter@entry=0x7fffd4bd1070) at /build/buildd/gtk+2.0-2.24.20/gtk/gtkcombobox.c:1904
 gtk_combo_box_list_button_released (widget=<optimized out>, event=0x2d0f970, data=0x2bcc6b0) at /build/buildd/gtk+2.0-2.24.20/gtk/gtkcombobox.c:4160