Empty diff shown

[mimmi20]

Question	Answer
Infection version	0.23.0
Test Framework version	PHPUnit 9.5.5
PHP version	7.4
Platform	Ubuntu 20.04 (Github Action)
Github Repo	mimmi20/mezzio-navigation-laminasviewrenderer-bootstrap@9fe605b

During a Build in a Github Action an empty diff was shown in the console output and in the Github Action.

The line of code was

$html .= $this->getIndent() . $this->getIndent() . '<ul class="breadcrumb">' . PHP_EOL;

With the Parameter "-s" , I could see on the console output that the "concat" Mutator was used. I asume that the Mutator tried to swap the both "$this->getIndent()" pieces.

It would be helpful, if the Github-Log-Output would include the used Mutator, when the Option "-s" is set.

[maks-rafalko]

Thanks for creating this bug report and sorry for the late response.

Interesting case with the empty diff, by the way ;)

Yes, this is exactly because identical expressions are swapped, here is a playground example (see the first escaped mutant - diff is empty as well https://infection-php.dev/r/p2n1)

Mutator name for GitHub Annotations logger will be added in #1540

For the future, feel free to make a PR, help is much appreciated!