immutable(ubyte)[] to receive

[Alexey]

Maybe someone knows why it doesn't work?
```
import std.concurrency;
import std.stdio: write, writeln, writef, writefln;
import std.variant : Variant;
import std.process : thisThreadID;

alias Buffer = immutable(ubyte)[];

void pros2(string name)
     {
      receive(

             (immutable(Buffer[]) h){
                 writeln(h);
                 ownerTid.send(123);
             }
      );
  }
void main()
{

     Buffer[] t ;
     t ~= cast(Buffer)"sdfsdfsdf";
     t ~= cast(Buffer)"sdfsdfsdf";
     immutable(Buffer[]) ti = cast(immutable)t;


     auto tid2 = spawn(&pros2, "hello");
     send(tid2, ti);
     receive(
        (int h){writeln(h);}
     );
  }
```