Segmentation fault when comparing FFI object

[YuanchengJiang]

Description

The following code:

<?php
$ffi = FFI::scope("TEST_300");
$ffi->printf("Hello World from %s!\n", "PHP");
$fusion = $ffi;
var_dump($fusion != 1);
?>

Resulted in this output:

Segmentation fault (core dumped)

To reproduce:

-d "zend_extension=/php-src/modules/opcache.so" -d "ffi.enable=1" -d "opcache.enable=1" -d "opcache.enable_cli=1" -d "opcache.preload=/php-src/tests/fused/preload.inc"

PHP Version

nightly

Operating System

ubuntu 22.04

[nielsdos]

Much simpler reproducer that doesn't need opcache:

<?php
$ffi = FFI::cdef();
var_dump($ffi != 1);

[nielsdos]

The problem is that the compare handler is required according to https://github.com/php/php-src/blob/35c8a010c6633a2a1ba7c16a0cf83affa07b819e/Zend/zend_object_handlers.h#L231C1-L231C64, but it isn't set for FFI. Should probably return ZEND_UNCOMPARABLE. I'll think a bit.