It is a bug ?

[Du Liang]

import std.stdio;
class AB{
	int A;
	int B = 2;
	int[] arrA;
	int[] arrB = [2,2,2]; // arrB is static in[]  or bug ?
	this(){
		this.A = 1;
		this.arrA=[1,1,1];
	}
}
void main(){
	AB ab1 = new AB();
	AB ab2 = new AB();
	writeln(ab1.A, " | " ,ab1.B, " | " ,ab1.arrA, " | " ,ab1.arrB);
	writeln(ab2.A, " | " ,ab2.B, " | " ,ab2.arrA, " | " ,ab2.arrB);
	writeln("change...");
	ab1.A = 10; 
	ab1.B = 20; 
	ab1.arrA[0] = 10; 
	ab1.arrB[0] = 20; // ab2.arrB = 20  why? bug?
	writeln(ab1.A, " | " ,ab1.B, " | " ,ab1.arrA, " | " ,ab1.arrB);
	writeln(ab2.A, " | " ,ab2.B, " | " ,ab2.arrA, " | " ,ab2.arrB);
	readln();
}