a:array[2] of int = mk();
a[0]=100;
a[1]=200;
prog(x:array of int){
	print("2==", ref x, "\n");
	x[0]=12345;
	print("1==", ref x, "\n");
	print("12345==", x[0], "\n");
	print("1==", ref a, "\n");
	print("100==", a[0], "\n");
}(a);
ref a;
a[0];
ref a;
