Bug in Rdmd?

[Jonathan Marler via Digitalmars-d-learn]

This code doesn't seem to work with rdmd.  Is this a bug?

  import std.stdio : byLine;
  int main(string[] args)
  {
    foreach(line; stdin.byLine) {
    }
    return 0;
  }

Compiler Output:
  Error: module std.stdio import 'byLine' not found