Assertion failure Zend/Optimizer/zend_inference.c:2086

Description

The following code:

<?php
require "connect.inc";
$link = ldap_connect_and_bind($uri, $user, $passwd, $protocol_version);
insert_dummy_data($link, $base);
$result = ldap_list($link, "$base", "(objectClass=person)");
$entry = ldap_first_entry($link, $result);
var_dump(
$entry = ldap_next_entry($link, $entry),
ldap_get_values($link, $entry, 'sn'),
$entry = ldap_next_entry($link, $entry)
);
$fusion = $base;
function renderRawGraph(array $parents) {
$fusion = array();
foreach ($parents as $p) {
foreach ($graph as $graph) {
$graph[$graph]['line'] = 1;
}
$graph[] = array(
'line' => 1,
);
}
}

Resulted in this output:

Warning: Narrowing occurred during type inference of ZEND_FETCH_DIM_W. Please file a bug report on https://github.com/php/php-src/issues in /tmp/test.php on line 17
php: /home/phpfuzz/WorkSpace/flowfusion/php-src/Zend/Optimizer/zend_inference.c:2086: void emit_type_narrowing_warning(const zend_op_array *, zend_ssa *, int): Assertion `0 && "Narrowing during type inference"' failed.
Aborted (core dumped)

To reproduce (only in JIT):

-d "zend_extension=/home/phpfuzz/WorkSpace/flowfusion/php-src/modules/opcace.so" -d "opcache.enable=1" -d "opcache.enable_cli=1" -d "opcache.jit=1254"

PHP Version

nightly

Operating System

ubuntu 22.04

Start with Zend/Optimizer/zend_inference.c:2086 and reproduce the assertion using PHP nightly with opcache JIT enabled and the supplied PHP snippet. Done means the example no longer emits the type-inference warning or aborts in the assertion path.