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<?php for ($a = $b = []; count($a) < 4; $b = &$a[], $b = $a) ; var_dump($a);
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { [0]=> &array(1) { [0]=> *RECURSION* } [1]=> &array(2) { [0]=> &array(1) { [0]=> *RECURSION* } [1]=> *RECURSION* } [2]=> &array(3) { [0]=> &array(1) { [0]=> *RECURSION* } [1]=> &array(2) { [0]=> &array(1) { [0]=> *RECURSION* } [1]=> *RECURSION* } [2]=> *RECURSION* } [3]=> *RECURSION* }

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