usort converts array to list

[rieschl]

Bug report

When usorting an array, the array gets converted to a list, but PHPStan thinks it is not.
It seems that PHPStorm inspects the array before sorting it, maybe because usort takes the array as reference?

Code snippet that reproduces the problem

https://phpstan.org/r/8f5bf8e6-ba7a-4180-a1cf-7adf0a57fe0a

Expected output

There should be no issue detected.
The same snippet executed in PHP (https://3v4l.org/nHSkZ) results in no error

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[ondrejmirtes]

Fixed: phpstan/phpstan-src#2891

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