require "variables"; # Invalid variable name set "${frop}" "frop"; set "...." "frop"; set "name." "frop"; set ".name" "frop"; # Not an error set "\n\a\m\e" "frop"; # Trying to assign match variable; set "0" "frop"; # Not an error set :UPPER "name" "frop"; # Invalid tag set :inner "name" "frop";