Generator memory leak when interrupted during argument evaluation

[arnaud-lb]

Description

Found while looking at #9735

The following code:

<?php

function f() {
}

$gen = function () use (&$gen) {
    f($gen, yield);
};

$gen = $gen();

foreach ($gen as $value) {
    break;
}

$gen = null;

gc_collect_cycles();

Resulted in this output:

[Fri Oct 14 15:51:40 2022]  Script:  'gen.php'
Zend/zend_generators.c(409) :  Freeing 0x00007fb3a365d3c0 (272 bytes), script=gen.php
=== Total 1 memory leaks detected ===

But I expected this output instead:

PHP Version

PHP 8.1 24c2970

Operating System

No response

[arnaud-lb]

Fixed in #9756