I do not know what is exactly the meaning of the elements in the output of the 3-element Array. Are they randomly given or? I thought the vector is uninitialized, right?
I’m not in the computer right now, but I think that is the representation of a float64 of the bit value 0000000...000, you can try with println(bitstring(x[1])) to see what’s happening. About why 64 zero bits have that representation… I don’t know, that’s how floating point works