Description:
------------
After the script is opcache'd, it results in the error below.

Testing environment: Apache 2.4.27 with event MPM on 64bit

Haven't tested for regression.

Test script:
---------------
<?php
function f() {
  $retval = false;
  if ($retval) { }
}
f();
exit("OK");


Expected result:
----------------
OK

Actual result:
--------------
PHP Fatal error:  Invalid opcode 49/1/8. in [...] on line 4