Description:
------------
Throwing exception from inside a foreach block can produce memory leaks, because ZEND_SWITCH_FREE opcode is not executed.

Reproduce code:
---------------
<?php
$data = file(__FILE__);
try {
  foreach ($data as $line) {
    throw new Exception("error");
  }
} catch (Exception $e) {
  echo "ok\n";
}
?>


Expected result:
----------------
ok

Actual result:
--------------
memory leaks