`ini_set('error_log')` sets filepath outside `open_basedir`

[mvorisek]

Q	A
PHPUnit version	12.1.0-now
PHP version	unrelated
Installation Method	Composer

Summary

introduced in #6127 & #6118

merged as 3f275eb

/cc @staabm

Current behavior

Time: 00:00.573, Memory: 8.00 MB
1 test triggered 1 PHP warning:
1) /builds/mvorisek/atk4-hintable/vendor/phpunit/phpunit/src/Framework/TestCase.php:1290
ini_set(): open_basedir restriction in effect. File() is not within the allowed path(s):
    (/builds/mvorisek/atk4-hintable:/tmp)
Triggered by:
* Mvorisek\Atk4\Hintable\Tests\Core\MethodTest::testMethodName
  /builds/mvorisek/atk4-hintable/tests/Core/MethodTest.php:13
OK, but there were issues!
Tests: 151, Assertions: 463, Warnings: 1.

How to reproduce

Run phpunit with open_basedir configured.

repro code: https://github.com/mvorisek/atk4-hintable-mirror/tree/dde63a7362f2aacacf1e91b8fda2ea6adcb0bcc9

(but it seems it is not related with https://github.com/mvorisek/atk4-hintable-mirror/blob/dde63a7362f2aacacf1e91b8fda2ea6adcb0bcc9/tests/Core/MethodTest.php#L13 specific test, the test name in the report is there as it is the 1st one executed)

Expected behavior

no error

[staabm]

Could you PR a small reproducer of the problem as PHPT test?

[mvorisek]

@staabm can I have your review on #6208?