Indexing array of thing gives (thing?) ?

[Zash]

This is things.tl:

local interface thing
	x:string
end

local things:{thing} = {};

for i = 1, #things do
	local t:thing = things[i];
	print(t.x);
end

This is the output of tlc things.tl:

things.tl:10:8: type error, attempt to assign 'thing?' to 'thing'
local t:thing = things[i];
      ^
things.tl:11:8: type error, attempt to index 'thing?' with '"x"'
print(t.x);
      ^

Why is this? How do I tell it that I'm really sure that it's not out of bounds?

[Veltas]

I recommend aliasing assert like suggested here: #89 (comment)

From that issue you'll see that there is a better way of doing this planned, but for now this is what we have.