Objects cannot access his private attributes anymore while handling error, in PHP 7.2, v2

trigger_php72_bugv2.php

#!/usr/bin/php -n
<?php

ini_set("display_errors", 1);
error_reporting(E_ALL);


class Foo {
    private $dummy1 = 1;
    private $dummy2 = 2;

    function __construct() {
        // This will create a "Undefined property" error when using reflection
        // on that object and iterating over properties.  This error is to be
        // expected, and I am triggering it only to trigger the bug in the error
        // handling.
        unset($this->dummy2);
    }
}


class ErrorHandler {
    private $private;

    function setup() {
        set_error_handler(
            function ($errno, $errstr, $errfile, $errline) {
                $this->handleError($errno, $errstr, $errfile, $errline);
                return true;
            }
        );
    }

    private function handleError($errno, $errstr, $errfile, $errline) {
        echo "Dealing with error $errstr, $errfile, $errline\n";
        // This attribute is no longer accessible in this object.  Same for other
        // objects and their private attributes once we reach in this state.
        $this->private;
        echo "Never executed in PHP7.2; there is a fatal error in the line above\n";
    }
}


$errorHandler = new ErrorHandler();
$errorHandler->setup();

$foo = new Foo();

// 1st stack frame contains the Foo object as 1st argument
$reflect = new ReflectionObject($foo);
$properties = $reflect->getProperties();
foreach ($properties as $property) {
    $property->setAccessible(true);
    $propertyKey = $property->getName();
    // This will trigger an error for "dummy2" property
    $value = $property->getValue($foo);
    echo "property $propertyKey value is $value\n";
}
echo "This line is not reached in PHP7.2; but it is reached in PHP 7.0\n";