bash 4.3 introduced a lot of changes (like addition of declare -n); there are many versions of bash, so it's not something set in stone. https://lists.gnu.org/

bash 4.3 introduced a lot of changes (like addition of declare -n); there are many versions of bash, so it's not something set in stone. https://lists.gnu.org/archive/html/info-gnu/2016-09/msg00012.html https://lists.gnu.org/archive/html/info-gnu/2016-09/msg00012...