D Book page 402 Concurrency FAIL

[Brother Bill via Digitalmars-d-learn]

In "The D Programming Language", page 402, the toy program fails.

The first fail is that enforce() needs: import std.exception;

The second fail is that when debugging, in Visual Studio 2015 
Community Edition,
it fails with this error:
   First-change exception: std.format.FormatException Unterminated 
format specifier: "%" at 
C:\D\dmd2\windows\bin\..\..\src\phobos\std\format.d(830).

Please provide full replacement of this toy program that works 
with D version 2.070.0

This is what was entered:

import std.concurrency, std.stdio, std.exception;

void main() {
	auto low = 0,
	     high = 100;
	auto tid = spawn(&writer);

	foreach (i; low .. high) {
		writeln("Main thread: ", i);
		tid.send(thisTid, i);
		enforce(receiveOnly!Tid() == tid);
	}
}

void writer() {
	for (;;) {
		auto msg = receiveOnly!(Tid, int)();
		writeln("secondary thread: ", msg[1]);
		msg[0].send(thisTid);
	}
}


Thank you.