Standard output does not get flushed in cygwin?

[Anonymouse via Digitalmars-d-learn]

Try this in a cygwin terminal:

import std.stdio;
import core.thread;
void main()
{
    foreach (i; 0..10)
    {
        writeln(i);
        Thread.sleep(1.seconds);
    }
}

This program will not output i, wait a second and then output 
i+1, etc. It will be silent for ten seconds and then spam the 
complete output in one go. If you hit Ctrl+C to break it in the 
middle of execution, nothing will be output at all.

Is there a way to work around this? The only thing I found was to 
tack stdout.flush() after every writeln call.