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<?php class _ { private function __destruct() {new self;} } class __ { private $f; public function __construct(&$f) { $this->f = &$f; } public function __destruct() { $this->f = function(){new _;}; } } $f = function () use (&$f) { $t = new __($f); echo "All is good"; }; $f(); $f();
Output for git.master, git.master_jit, rfc.property-hooks
All is good Fatal error: Uncaught Error: Call to private _::__destruct() from scope __ in /in/puQYJ:18 Stack trace: #0 /in/puQYJ(29): __->{closure}() #1 {main} thrown in /in/puQYJ on line 18
Process exited with code 255.

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