Newer version of Unity (2019 LTS) throws NativeArray not allocated exception when trying to draw tree

[VergilUa]

This happens because of NativeQuadTree.Draw tries to GetEnumerator from results, which does not exist.
Can be simply fixed by checking if results list exist like so:

if (results.IsCreated) {
	foreach (var element in results) {
		texture[(int) ((element.pos.x + widthAdd) * widthMult)][(int) ((element.pos.y + heightAdd) * heightMult)]	= Color.green;
	}
}

[marijnz]

That makes sense. You could create a PR for this if you like.