LOL! No, they’ll just grow a bigger onion. You can cut off the greens as you go and use them as you would Green Onions of or Chives. Double Duty! :)
Wait a minute...YOU had an EMPTY POT? LOL!
That pot is on the upper terrace so pots up there see either bulbs like Lilies or annuals when we start using it regularly again for a little splash of color. Winter doesn't get cold here but it does get rainy so we bring all of the cushions in.