1--TEST--
2Return type cannot add nullability (contravariance)
3--FILE--
4<?php
5
6interface A {
7    function method(): int;
8}
9
10interface B extends A {
11    function method(): ?int;
12}
13--EXPECTF--
14Fatal error: Declaration of B::method(): ?int must be compatible with A::method(): int in %s on line %d
15