on_row_expanded could be called on node without children by sig_autodetect, in such case the returned child is an invalid GtkTreeIter. So it must ignore such case to let sig_autodetect popup an error message. issue4313 review7791002
on_row_expanded could be called on node without children by sig_autodetect, in such case the returned child is an invalid GtkTreeIter. So it must ignore such case to let sig_autodetect popup an error message. issue4313 review7791002