RW operation on readonly property doesn't throw with JIT

[iluuu1994]

Description

The following code:

--TEST--
Readonly RW doesn't throw with JIT
--FILE--
<?php

class Test {
    public readonly int $prop;

    public function __construct() {
        $this->prop = 1;
    }

    public function rw() {
        $this->prop += 1;
        echo "Done\n";
    }
}

$test = new Test();
try {
    $test->rw();
} catch (Error $e) {
    echo $e->getMessage(), "\n";
}

?>
--EXPECT--
Cannot modify readonly property Test::$prop

Resulted in this output:

Done

But I expected this output instead:

Cannot modify readonly property Test::$prop

Discovered in #8188.

PHP Version

PHP 8.1.7

Operating System

Fedora 36

[iluuu1994]

Thanks @dstogov!

[iluuu1994]

@dstogov Btw, is this intentionally not backported to PHP-8.1?

[dstogov]

@dstogov Btw, is this intentionally not backported to PHP-8.1?

I forgot, read-only properties came in 8.1. I'll backport this.