No print output after using Pointer

[Moosems]

I couldn't find any good examples on how to use the Pointer type and was messing around with it in the playground and noticed this gave no print output when all comments are uncommented, am I just doing this wrong?

from memory.unsafe import Pointer


@value
@register_passable("trivial")
struct Pair:
    var a: Int
    #var b: Pointer[Int]


def main():
    var ex_a = 5
    #var ex_b = Pointer[Int]()
    #ex_b[0] = 5
    var ex_pair = Pair(ex_a)#, ex_b)
    print(ex_pair.a)
    #print(ex_pair.b)
    print("Worked?")

[Moosems]

I got it working:

from memory.unsafe import Pointer


@value
@register_passable("trivial")
struct Pair:
    var a: Int
    var b: Pointer[Int]


def main():
    var ex_a = 5
    var ex_b = Pointer[Int].alloc(1)
    ex_b[0] = 5
    var ex_pair = Pair(ex_a, ex_b)
    print(ex_pair.a)
    print(ex_pair.b.load())
    print("Worked?")