Incorrect error "undefined method" messages

[YuanchengJiang]

Description

The following code:

<?php
$i = new ArrayIterator(array(1,1,1,1,1));
$i = new CachingIterator($i,CachingIterator::FULL_CACHE);
$fusion = $i;
$fusion->load("x");
?>

Resulted in this output:

Fatal error: Uncaught Error: Call to undefined method ArrayIterator::load()

But I expected this output instead (JIT 1215):

Fatal error: Uncaught Error: Call to undefined method CachingIterator::load()

PHP Version

nightly

Operating System

ubuntu 22.04

[nielsdos]

It's related to get_method being able to change the object, I think we should be using orig_obj... So this is also SPL-related as SPL changes the object pointer.