# conditional type1
if ($x1) {

   warn "x1 was true\n";

   if ($x2) {

      warn "x2 was true\n";

      print "here\n";
   }
}

# conditional type2
if ($x1 && $x2) {

   warn "well, they were both true ... still don't see the bug\n"; 

   print "here\n";
}