Missing error on duplicate type on parameters/return value

[the-liquid-metal]

Bug Description Missing error on duplicate type on parameters/return value.

Eclipse environment Version: 2023-06 (4.28.0) Build id: 20230608-1333 PDT: 8.0.0.202306050832

System

• PHP Version: 8.2.7, 8.1.20, 8.0.29, 7.4.33 (via https://onlinephp.io/)

To Reproduce Steps to reproduce the behavior: copy-paste this script to the IDE

<?php
declare(strict_types=1);

namespace ns1\ns2;

interface Test12 {
    public function fn1(int $par1): int;
}

class Test12b implements Test12, Test12 // this statement must trigger error
{
    public function fn1(int $par1): int {}
}

class Test12c
{
    public function fn1(Test12 | Test12 $par1): int {} // this statement must trigger error
    public function fn2(Test12 & Test12 $par1): int {} // this statement must trigger error
    public function fn3(int $par1): Test12 | Test12 {} // this statement must trigger error
    public function fn4(int $par1): Test12 & Test12 {} // this statement must trigger error
}

trait Test12d
{
    public function fn1(Test12 | Test12 $par1): int {} // this statement must trigger error
    public function fn2(Test12 & Test12 $par1): int {} // this statement must trigger error
    public function fn3(int $par1): Test12 | Test12 {} // this statement must trigger error
    public function fn4(int $par1): Test12 & Test12 {} // this statement must trigger error
}