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PHP 8.5.12 CLI Segfault (exit code 2) when running PHPUnit 12 on Ubuntu 26.04 #25208
Closed as not planned
Description
Description
Description
I am experiencing a hard CLI segmentation fault (exit code 2) when running a PHPUnit test suite. The crash occurs on the latest PHP 8.5.12 release, even though the 8.5.12 changelog mentions fixes for several JIT segfaults (e.g., GH-20890, GH-24388).
PHPUnit only outputs Fatal error: Premature end of PHP process when running <TestClass>::<method>. The crash is highly reproducible on Ubuntu 26.04 but does not happen on PHP 8.3.
Environment
- OS: Ubuntu 26.04 LTS (also reproducible on GitHub Actions
ubuntu-latestwhich recently migrated to Ubuntu 26) - PHP Version: PHP 8.5.12 (cli) (built: Oct 21 2026)
- PHPUnit Version: 12.5.37 (Laravel 13)
- SAPI: CLI
- OpCache: Enabled (JIT is on by default in CLI). Note: The crash still occurs even when JIT is explicitly disabled via
-d opcache.enable_cli=0.
Steps to Reproduce
- Clone a Laravel 13 project with ~145 feature/unit tests.
- Run
php artisan test(which invokesvendor/bin/phpunit). - The process silently crashes and exits with code 2 right at
Tests\Feature\Admin\AdminFinanceTest::test_plain_admin_gets_403_on_approve_withdrawal_post.
Expected Behavior
All tests should pass without crashing the CLI process.
Actual Behavior
The process terminates abruptly with exit code 2. No standard PHP fatal error is logged.
Additional Context
- Running a single test file (
AdminFinanceTest.phpalone) passes successfully. - Running the full suite crashes at the exact same method every time.
- The code is fully compatible with PHP 8.5, and all 12 architecture tests pass. This appears to be an engine-level issue specifically triggered by the full test suite execution on Ubuntu 26.04.
- Downgrading to PHP 8.3 on the exact same codebase resolves the issue completely.
PHP Version
PHP 8.5.12 (cli) (built: Oct 21 2026 08:07:33) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.5.12, Copyright (c) Zend Technologies
with Zend OPcache v8.5.12, Copyright (c), by Zend Technologies
Operating System
Ubuntu 26.04 LTS (Tencent Cloud VM)
Activity
arshidkv12 commentedon Nov 5, 2026
Note: The test
Tests\Feature\Admin\AdminFinanceTest::test_plain_admin_gets_403_on_approve_withdrawal_postdoes not exist in the Laravel framework repository or https://github.com/laravel/laravelxiaxia9615 commentedon Nov 6, 2026
为造成的噪音致歉 —— 这是我这边的一场乌龙。我判断得太急了，把 PHPUnit 的输出误读成了引擎级 segfault。
应用层的 FatalError（Class App\Models\Withdrawal cannot extend final class ...）首次记录于 2026-11-05 12:52:37。修好
final class
继承问题后，故障就消失了。退出码 2 的 Premature end of PHP process 和 SIGSEGV 不是一回事。
为占用 triage 时间致歉，也感谢 @arshidkv12 的快速核查。关闭此 issue。