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<?php namespace NS { class C { public $fn; public function __construct() { $this->fn = function (string $arg) { var_dump("fn"); }; } } } namespace { $fn = (new NS\C)->fn; $fn(null); echo "Done\n"; }
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: NS\C::NS\{closure}(): Argument #1 ($arg) must be of type string, null given, called in /in/TD9s0 on line 17 and defined in /in/TD9s0:8 Stack trace: #0 /in/TD9s0(17): NS\C->NS\{closure}(NULL) #1 {main} thrown in /in/TD9s0 on line 8
Process exited with code 255.

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