What does this program print?

What does this program print?

squares = (number * number for number in range(3))

print(next(squares))
print(list(squares))
print(list(squares))

1. 0, then [1, 4], then []
2. 0, then [0, 1, 4], then [0, 1, 4]
3. 0, then [1, 4], then [1, 4]
4. It raises StopIteration on the second list() call.