array(1) {
  [0]=>
  array(1) {
    [0]=>
    array(0) {
    }
  }
}

Notice: Undefined variable: b in %s/test/slow/reference/1096.php on line 6
array(1) {
  [0]=>
  array(1) {
    [0]=>
    NULL
  }
}

Notice: Undefined variable: c in %s/test/slow/reference/1096.php on line 8
array(1) {
  [0]=>
  NULL
}
