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<?php class x { function __construct(protected readonly int $x) { } } class y extends x { function __construct(protected readonly int $x) { parent::__construct($x); } } new y(1); // Fatal error: Uncaught Error: Cannot modify readonly property y::$x class z extends x { function __construct(int $x) { parent::__construct($x); } } new z(1); // OK ?>
Output for git.master_jit, git.master
Fatal error: Uncaught Error: Cannot modify readonly property y::$x in /in/RIZ8k:4 Stack trace: #0 /in/RIZ8k(10): x->__construct(1) #1 /in/RIZ8k(14): y->__construct(1) #2 {main} thrown in /in/RIZ8k on line 4
Process exited with code 255.

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