Excessive memory usage during analysis

[l-x]

Bug Report

Subject	Details
Rector version	v2.4.0
PHP	8.4.19 and 8.5.4

When Rector analyzes the code example below, it quickly uses up all available memory. The memory_limit setting in php.ini does not seem to take effect in this case.

Minimal PHP Code Causing Issue

<?php

function willExhaustMemory()
{
    $result = \Carbon\CarbonPeriod::create();

    return $result->first();
}

Expected Behaviour

Normal analysis

[samsonasik]

Could you create reproducible repo for this so we can clone and test locally? Thank you.

[l-x]

Could you create reproducible repo for this so we can clone and test locally? Thank you.

Of course, here you are: https://forge.pnyhf.eu/l-x/rector-memory-issue.git

As soon as I disable the deadCode prepared set in rector.php everything works as it is supposed to.

[samsonasik]

The issue seems on \Rector\DeadCode\Rector\Assign\RemoveUnusedVariableAssignRector, you can temporary skip the rule:

->withSkip([
    \Rector\DeadCode\Rector\Assign\RemoveUnusedVariableAssignRector::class => [
         __DIR__ . '/src/failing_function.php',
   ],
]);

I will look into it, feel free to provide a patch if you're faster than me :)

[calebdw]

We were experiencing the same thing and the RemoveUnusedVariableAssignRector is responsible