get_defined_vars() doesn't make function arguments considered used

[hocker1]

Bug report

PHP function get_defined_vars() creates array of all currently visible variables (name => value), including function arguments. PHPStan probably doesn't mark arguments as used after calling get_defined_vars(). Similar function - func_get_args() correctly marks arguments as used.

Code snippet that reproduces the problem

https://phpstan.org/r/5a1cab33-f3ff-4b26-ba76-c7bc7feaa235

Expected output

PHPStan reported issue, which is (in my opinion) not an issue.

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[ondrejmirtes]

Fixed phpstan/phpstan-src#3012

[github-actions]

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