`DowngradeLevelSetList` to PHP <8.1 in Rector Versions >0.18.5 Cannot Be Run On PHP Versions <8.1 about rector HOT 6 CLOSED

Ok, reproduced in php 8.0:

➜  rector-847-reproduction git:(main) php80 vendor/bin/rector process index.php --dry-run
PHP Fatal error:  Uncaught Error: Undefined constant "MHASH_XXH32" in /Users/samsonasik/www/rector-847-reproduction/vendor/rector/rector/vendor/illuminate/container/Container.php:818
Stack trace:

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Wonderful, that works!

Thank you for such a quick turnaround. 😄

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Looking at the error, you don't have MHASH_XXH32 constant, I guess you have different php version between cli and web, could you create a reproducible repo? Thank you.

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Looking at the error, you don't have MHASH_XXH32 constant,

Not sure what this is, searches don't turn up anything and given it's happening in the DI layer, I assumed it was a dynamically generated name.

The WebDevops PHP Image should contain pretty much all PHP modules by default, and I don't see any special requirements listed for Rector so I'm not sure what would cause it. This also happens on production servers (Debian via Sury) and a local machine (Arch via official packages), so seems to reproduce across several real-world cases.

could you create a reproducible repo?

Of course! Here you go.

The reproductions steps are similar to the above:

git clone https://github.com/Kenneth-Sills/rector-847-reproduction
cd rector-847-reproduction
docker run --rm -it -v `pwd`:/app webdevops/php:8.0 bash
cd app
composer exec rector -- --dry-run process index.php

Let me know if you need anything else from me. 😄

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Ok, it seems the following constant need to be added:

if (PHP_VERSION_ID < 80100) {
    if (! defined('MHASH_XXH32')) {
        define('MHASH_XXH32', 38);
    }

    if (! defined('MHASH_XXH64')) {
        define('MHASH_XXH64', 39);
    }

    if (! defined('MHASH_XXH3')) {
        define('MHASH_XXH3', 40);
    }

    if (! defined('MHASH_XXH128')) {
        define('MHASH_XXH128', 41);
    }
}

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@Kenneth-Sills could you try latest rector/rector:dev-main:

composer config minimum-stability dev
composer config prefer-stable true
composer require --dev rector/rector:dev-main

and verify if it now resolved? thank you.

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