[[ -v <var> ]] and bash5

In bash 4.4+ (I think it was 4.4), [[ -v <var> ]] behaves differently from the versions before.

In Line 192 this occures.

#@ bini_db_is_loaded <db-name>
# check if db is loaded
# errors 2, 51, 52
function bini_db_is_loaded() {
    (( $# == 1 )) || {
	bb_ierr "bini_db_is_loaded called with $# args instead of 1"
	return 2
    }

    local _dbname=$1
    _bini_validate_dbname "$_dbname" || return 51

    [[ -v "bini_db_$_dbname" ]] || return 52
}