Warning message on PHP files consisting of only comments when zend.assertions enabled

[fitztrev]

When PHP's zend.assertions are enabled, there's a Warning when a file is encountered that only contains a comment. This is a failing test to demonstrate #1157.

File contents:

<?php

// A single-line comment

Output:

PHP Warning:  assert(): assert($itemStartPos >= 0 && $itemEndPos >= 0) failed in
vendor/nikic/php-parser/lib/PhpParser/PrettyPrinterAbstract.php on line 753

See the Travis log for this PR for either the DOG_FOOD or RUN_RECTOR builds. Direct link

[TomasVotruba]

Any idea how to fix this, while you looked in the code?

[fitztrev]

No, sorry. I'm not sure what causes it.

[TomasVotruba]

I see. Without clear cause of this, there is no way to fix it. Closing as won't fix

Thank you for your time investment and investigation

[fitztrev]

No problem. Thanks for taking a look. I'll re-open my issue in the nikic/PHP-parser repo now that I have steps-to-reproduce and the maintainers there can determine how/if they would like to handle it.