Description:
------------
Function cannot fetch its arguments with func_* functions after last one passed by its name.

Test script:
---------------
function test_func($arg1 = 'a', $arg2 = 'b', $arg3 = 'c', $arg4 = 'd')
{
    return json_encode([
        'func_num_args' => func_num_args(),
        'func_get_args' => func_get_args(),
        'direct_args' => [$arg1, $arg2, $arg3, $arg4],
    ], JSON_PRETTY_PRINT);
}

echo test_func(arg1: 'hello', arg3: 'world');


Expected result:
----------------
{
    "func_num_args": 4,
    "func_get_args": [
        "hello",
        "b",
        "world",
        "d"
    ],
    "direct_args": [
        "hello",
        "b",
        "world",
        "d"
    ]
}

Actual result:
--------------
{
    "func_num_args": 3,
    "func_get_args": [
        "hello",
        "b",
        "world"
    ],
    "direct_args": [
        "hello",
        "b",
        "world",
        "d"
    ]
}