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Segmentation fault (zend_mm_heap corrupted) with pipe operator #21748
Description
Description
Step 1:
The following code:
function test(string $string): void
{
echo $string . PHP_EOL;
}
'abc' |> test(...);
Running with extra debug output :
php -e -n ./test.php
As expected returns:
abc
Step 2:
Add a file const.php
<?php
define('OPQ', false);
And require it in test.php:
require_once __DIR__ . '/const.php';
Run the same command:
php -e -n ./test.php
Returns:
zend_mm_heap corrupted
Step 3:
But add another define in test.php
require_once 'const.php';
define('XYZ', false);
function test(string $string): void
{
echo $string . PHP_EOL;
}
'abc' |> test(...);
Run the same command:
php -e -n ./test.php
Works fine and returns:
abc
Bonus content:
Try the steps above without -n:
php -e ./test.php
Returns random content eg.:
<�V
PHP Version
PHP 8.5.5 (cli) (built: Apr 9 2026 22:14:17) (ZTS)
Copyright (c) The PHP Group
Built by https://github.com/docker-library/php
Zend Engine v4.5.5, Copyright (c) Zend Technologies
with Zend OPcache v8.5.5, Copyright (c), by Zend Technologies
Operating System
Linux 88a458a84760 6.19.12-1-cachyos #1 SMP PREEMPT_DYNAMIC Sat, 11 Apr 2026 19:24:21 +0000 x86_64 GNU/Linux
Activity
iluuu1994 commentedon Apr 14, 2026
Hi @adrianszczotkowski. See GH-21504, this should be fixed in the next release.