The following regexp:

con = new RegExp(r"^(.*) .*$");

When used to find "y vn z w" returns "y" for the expression con.match(1).  It should match "y vn z".

Sample Code:

import std.stdio;
import std.regexp;

int main()
{
  RegExp con = new RegExp(r"^(.*) .*$");
  char[] line = "y vn z w";
  int ret = con.find(line);
  fwritef(stderr, "return value = %d, match(1) == %s\n", ret, con.match(1));
  return 0;
}