Description:
------------
When an error occurs inside __toString method, for example call to an undefined function, an Error is thrown. But since __toString does not allow exceptions to be thrown from inside, it just says "__toString() must not throw an exception".

This behavior is especially confusing e.g. in case of a typo (see below).

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

echo new class {
	function __toString() {
		return stravl(123); // should be strval
	}
};

Expected result:
----------------
Something more accurate, either the message of the Error itself or at least better generic message.

Actual result:
--------------
Fatal error: Method class@anonymous::__toString() must not throw an exception