Description:
------------
function that recieve default arguments by reference don´t work, php version 7.3.6 exactly. 

Test script:
---------------
//Don´t work
$arr = [10];
function asign(&..$arr){
    $arr[0] = 100;
}
asign($arr);
echo "<br> $arr[0]";
//Work
$arr = [10];
function asign(&$arr){
    $arr[0] = 100;
}
asign($arr);
echo "<br> $arr[0]";

Expected result:
----------------
that the value changed into function

Actual result:
--------------
it shows nothing on the screen, not even a warning ...