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<?php class Foo { public int $bar = 42; public function &getIterator() { foreach([1, &$this->bar] as &$item) { yield $item; } } } $foo = new Foo(); foreach($foo->getIterator() as &$item) { $a = &$item; } $a = "blah"; var_dump($foo);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: Cannot assign string to reference held by property Foo::$bar of type int in /in/DQvKe:22 Stack trace: #0 {main} thrown in /in/DQvKe on line 22
Process exited with code 255.

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