Bug #81249 [NEW]: Intermittent property assignment failure with JIT enabled
From: smokey101stair at gmail dot com
Operating system: Ubuntu 20.04
PHP version: 8.0.8
Package: JIT
Bug Type: Bug
Bug description:Intermittent property assignment failure with JIT enabled
Description:
------------
PHP 8.0.8 (cli) (built: Jul 4 2021 21:22:34) ( NTS )
Copyright (c) The PHP Group
Zend Engine v4.0.8, Copyright (c) Zend Technologies
with Zend OPcache v8.0.8, Copyright (c), by Zend Technologies
PHP was compiled using PHPBrew, if that makes a difference.
opcache.jit=1255
opcache.memory_consumption=256
opcache.max_accelerated_files=20000
opcache.jit_buffer_size=256M
zend.assertions=1
The test script decodes EUC-JP text to Unicode Code Points. I tried to
reduce the script as much as possible, but it was very temperamental
when removing if statements.
When processing the first byte, 8F, the assignment at
https://gist.github.com/TRowbotham/4dc7c8dc1714edab69019e0d71c17c02#file-jit1-php-L90
fails intermittently. This leaves $this->lead set to its initial value
of 0, which eventually leads to the script returning an error instead of
a code point.
The script is expected to transform the EUC-JP encoded bytes to the
Unicode U+2D8 code point.
Test script:
---------------
https://gist.github.com/TRowbotham/4dc7c8dc1714edab69019e0d71c17c02
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Edit bug report at https://bugs.php.net/bug.php?id=81249&edit=1
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Fix committed: https://bugs.php.net/fix.php?id=81249&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=81249&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=81249&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=81249&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=81249&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=81249&r=support
Expected behavior: https://bugs.php.net/fix.php?id=81249&r=notwrong
Not enough info: https://bugs.php.net/fix.php?id=81249&r=notenoughinfo
Submitted twice: https://bugs.php.net/fix.php?id=81249&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=81249&r=globals
PHP version support discontinued: https://bugs.php.net/fix.php?id=81249&r=phptooold
Daylight Savings: https://bugs.php.net/fix.php?id=81249&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=81249&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=81249&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=81249&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=81249&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=81249&r=mysqlcfg
Thread (5 messages)
- smokey101stair at gmail dot com