Bug #81432 [Opn]: JIT bug (tracing mode only) with named arguments
Edit report at https://bugs.php.net/bug.php?id=81432&edit=1
ID: 81432
Updated by: nikic@php.net
Reported by: julien dot boudry at gmail dot com
Summary: JIT bug (tracing mode only) with named arguments
Status: Open
Type: Bug
Package: JIT
Operating System: Windows 10 + Linux (With Docker)
PHP Version: 8.0.11
Block user comment: N
Private report: N
New Comment:
This might have been fixed by https://github.com/php/php-src/commit/512dfaba3a15062b447ec02f492f0af8b3e14d2a,
which is part of 8.0.12.
Previous Comments:
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[2021-10-06 16:57:50] julien dot boudry at gmail dot com
Still the same with php version 8.0.11
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[2021-09-14 12:54:50] julien dot boudry at gmail dot com
Reproduce it easily with Docker Official images:
(from docker image php:8.0.10-cli-bullseye)
apt-get update && apt-get install -qq git
git clone https://github.com/julien-boudry/Condorcet.git
cd Condorcet
#(not necessary today)
git checkout 31093192e8fa21e1
# Working fine
php Dev/bugs/JitBug.php
# OR
php -dzend_extension=opcache -dopcache.enable_cli=1 Dev/bugs/JitBug.php
# OR
php -dzend_extension=opcache -dopcache.enable_cli=1 -dopcache.jit_buffer_size=100M
-dopcache.jit=function Dev/bugs/JitBug.php
# Failing
php -dzend_extension=opcache -dopcache.enable_cli=1 -dopcache.jit_buffer_size=100M
-dopcache.jit=tracing Dev/bugs/JitBug.php
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[2021-09-12 14:12:26] julien dot boudry at gmail dot com
Description:
------------
Hello,
I made many attempts to reproduce this bug in a theoretical way with a very easily understandable
PHP code. And my efforts did not succeed and it must be used in the context of a rather heavy
project.
However, with further effort to reproduce it, it is I believe quite aberrant and easy to see just by
following the trace. Since it mixes variables passed to a function call in a totally impossible way.
* Occurs only in opcache.jit=tracing mode, but everything works fine with opcache.jit=function, also
works fine without JIT (with opcache enabled or disabled).
* Does not seem to be able to be reproduced without the use of named arguments. If I remove the
named argument, everything works fine.
* Sometimes it works fine for no reason. Especially after a first run (but not after a second run)
after modifying a file, which seems to point to a cache problem?
* Is not reproducible in PHP 8.1-RC1!
* Happens with 8.0.10 x64 NTS (tested on Windows and Linux (official PHP Docker images on WSL2)
The details and means of reproduction are detailed here: https://github.com/julien-boudry/Condorcet/issues/61
Test script:
---------------
https://github.com/julien-boudry/Condorcet/issues/61
Expected result:
----------------
Same result as without opcache.jit=tracing, not any error.
Actual result:
--------------
PHP Fatal error: Uncaught TypeError: CondorcetPHP\Condorcet\Result::__construct(): Argument #6
($seats) must be of type ?int, CondorcetPHP\Condorcet\Election given, called in
C:\dev_scripts\Condorcet\lib\Algo\Method.php on line 84 and defined in
C:\dev_scripts\Condorcet\lib\Result.php:89
Stack trace:
#0 C:\dev_scripts\Condorcet\lib\Algo\Method.php(84): CondorcetPHP\Condorcet\Result->__construct()
#1 C:\dev_scripts\Condorcet\lib\Algo\Methods\STV\SingleTransferableVote.php(91):
CondorcetPHP\Condorcet\Algo\Method->createResult()
#2 C:\dev_scripts\Condorcet\lib\Algo\Method.php(63):
CondorcetPHP\Condorcet\Algo\Methods\STV\SingleTransferableVote->compute()
#3 C:\dev_scripts\Condorcet\lib\ElectionProcess\ResultsProcess.php(80):
CondorcetPHP\Condorcet\Algo\Method->getResult()
#4 C:\dev_scripts\Condorcet\Dev\bugs\JitBug.php(37): CondorcetPHP\Condorcet\Election->getResult()
#5 {main}
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Edit this bug report at https://bugs.php.net/bug.php?id=81432&edit=1
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