Handle crash redeclare isPHPStanTestPreloaded() function

[samsonasik]

Ref rectorphp/rector#9430

I will check if it can be reproduced at https://github.com/rectorphp/rector-compat-tests

@X-Coder264 could you verify by manual patch of this into vendor/rector/rector/preload.php ? Better if you can provide minimal reproducible repo so we can properly test it :)

[samsonasik]

define early seems also needed when check function_exists(), avoid crash

Call to undefined function isPHPStanTestPreloaded()

232dcab

[samsonasik]

@TomasVotruba I am thinking that the isPHPStanTestPreloaded() can just be removed, and use directly check:

if (defined('PHPUNIT_COMPOSER_INSTALL') 
     && class_exists(PHPStanTestCase::class, false)
     && interface_exists(Node::class, false)) {
     return;
}

wdyt?

[samsonasik]

@TomasVotruba I created alternative PR for it, which should be safer:

• [Alternative] Use direct check to avoid redeclare function isPHPStanTestPreloaded() #7461

[TomasVotruba]

As I stated, let's isolate the reproduced first, to avoid back and forth guessing PRs. Wait with PRs before we have failing test in https://github.com/rectorphp/rector-compat-tests

[samsonasik]

Test added at:

• Add test to reproduce cannot redeclare isPHPStanTestPreloaded() rector-compat-tests#1