Description:
------------
PHP 8.0.0 made it so that the bcmath functions (among others) "throw an Error exception if the validation of the parameters fails" but there's one condition in which a warning will still be triggered (as opposed to an exception being thrown).

Test script:
---------------
<?php
bcadd('a', 'a');

Expected result:
----------------
throw new TypeError('bcadd(): Argument #1 ($num1) must be numeric'); or some such

Actual result:
--------------
trigger_error('bcadd: bcmath function argument is not well-formed', E_USER_WARNING);