Bug report

When using an anonymous function with a reference in use , the value checked is the value at the time of function declaration and ignores that the value may change.
https://phpstan.org/r/920ed53d-18a7-477d-b478-accfc6f8e8be

<?php

$tmpdir = "";
$myfunc = function () use (&$tmpdir) {
	if ($tmpdir !== "" && file_exists($tmpdir)) {
		echo $tmpdir;
	}
};

$tmpdir = "/tmp/my/useful/tempdir";
$myfunc();

Gives

Result of && is always false.
Strict comparison using !== between '' and '' will always evaluate to false.

Code snippet that reproduces the problem

https://phpstan.org/r/920ed53d-18a7-477d-b478-accfc6f8e8be

Expected output

no error

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