False positive "will always evaluate to false" after array_filter and reset

[rieschl]

Bug report

When an array with possible null values is filtered with array_filter and then the first entry is fetched with reset, PHPStan thinks that the array cannot be empty and will emit an error on a === false check.

I tried it on version 1.8.4. 1.8.3 outputs the same error, but 1.8.2 does not.
PHP version 7.4.30

Code snippet that reproduces the problem

https://phpstan.org/r/808dcfd1-17d2-4a54-8cf7-defb3d90dbb1

Expected output

PHPStan should not output an error because reset indeed can return false.

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PHPStan helps me every time I write some code because it reminds me that there are things to consider I didn't think about 🙂

[rieschl]

Thanks for the quick fix!

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