What is the corect behavour for lazy in foreach variadic template

[Sean Campbell via Digitalmars-d-learn]

Take the following code for example

module test;
import std.stdio;
void test(T...)(lazy T args)
{
        foreach(arg;args) //bar is invoked here
        {
                writeln("about to process arg");
		writefln("processing arg %s",arg); //but it should be invoked 
here, right?
        }
}

int bar()
{
        writeln("bar invoked");
        return 1;
}

void main()
{
        test(bar());
}

shouldn't bar be evaluated when writefln is called, not at the 
start of the loop.