Description:
------------
Since php version 7.4.9 and later, passing any non-variable to a function that expects a reference results in an error.

From 7.1.0 to 7.4.8 the same would produce no warning, notice or anything and just work.
Before 7.1.0 this would issue a notice but still execute the code.
In 5.0.5 this would crash with an error.

Maybe this is missing documentation and not a bug but changing behavior like this inside a minor version shouldn't be intended.

See https://3v4l.org/iUp7Q

Test script:
---------------
<?php

function test(&$var)
{
    return $var;
}

echo test(strval('var'));

Expected result:
----------------
Output of "var" and a notice

Actual result:
--------------
fatal error