+ gsu_is_a_number "${BASH_VERSINFO[0]}"
+ if [[ $ret -lt 0 ]]; then
+ gsu_msg "fatal: failed to determine bash version"
+ exit 1
+ fi
+
+ if [[ "${BASH_VERSINFO[0]}" -lt 4 ]]; then
+ gsu_msg "fatal: This script requires at least bash 4.0"
+ exit 1
+ fi