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<?php class A { public function __construct(private readonly stdClass $std) {} public function someAction() { $this->std = $this->modify($this->std); } private function modify(stdClass $std) { $std->foo = 'test'; return $std; } } $a = new A(new stdClass); $a->someAction();
Output for git.master, git.master_jit
Fatal error: Uncaught Error: Cannot modify readonly property A::$std in /in/BpX2t:10 Stack trace: #0 /in/BpX2t(21): A->someAction() #1 {main} thrown in /in/BpX2t on line 10
Process exited with code 255.

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