8.3 - cannot set finality and visibility for method from trait at the same time

Description

The following code:

<?php

trait SimpleTrait
{
    private function foo() {}
}

class TraitFixtureWithFinalAndProtected
{
    use SimpleTrait {
        foo as final protected;
    }
}

$rm = new ReflectionMethod(TraitFixtureWithFinalAndProtected::class, 'foo');
var_dump($rm->isFinal());
var_dump($rm->isPrivate());
var_dump($rm->isProtected());
var_dump($rm->isPublic());

Resulted in this output:

bool(false)
bool(true)
bool(false)
bool(false)

But I expected this output instead:

bool(true)
bool(false)
bool(true)
bool(false)

Looks like as final protected is completely ignored, does not change the method but does not throw an error either.

Related to: https://github.com/php/php-src/issues/12854

PHP Version

PHP 8.3

Operating System

No response

首先运行提供的 PHP 8.3 复现程序，并将 ReflectionMethod 标志与预期输出进行比较。跟踪负责 as final protected 的 trait 方法别名处理路径，然后添加一个回归测试，展示两个修饰符都已应用，并确认反射得到的可见性和 final 状态。