Wrong method override called

[roberthusak]

Test case:

<?php
class A implements Iterator {
  function rewind() { echo "A"; }
  function next() { }
  function valid() { }
  function key() { }
  function current() { }
}
class B extends A {
  function rewind() { echo "B"; }
}
function test(Iterator $i) {
  $i->rewind();
}
test(new B);

Expected result: B
Actual result: A