A array bug?

[taqya]

Hi,i write this code. then d compiler is shutdown.
Is it a array bug?

//Digital Mars D Compiler v2.014 (windows)
import std.stdio;
int main()
{
        char[] a = "a".dup;
        char[] b = "b".dup;
        writefln(a + b); //Error: Array operations not implemented
        return 0;                
}