PHPStan insists a `use` variable by reference cannot change types

[neildaniels]

Bug report

When writing a Closure with a use reference variable, PHPStan assumes the Type of that variable is always what it was at the place where the code is written.

Code snippet that reproduces the problem

$foo = false;

$test = function() use (&$foo) {
	if (is_array($foo)) {
		echo 'array';
	}
	else {
		echo 'not array';	
	}
};

$foo = [];

$test();

The code above actually prints array, even though PHPStan insists that:

Call to function is_array() with false will always evaluate to false.

https://phpstan.org/r/6967bdde-8c8f-476d-adcd-c94db723cd8b

Expected output

No reported error.

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[ondrejmirtes]

References are tricky for static analysis. Use this workaround: https://phpstan.org/r/d0a6e763-62c0-42f2-a99f-6817809609bd