Bug Report

Minimal PHP Code Causing Issue

See https://getrector.com/demo/4239ac15-dcf4-4803-a463-bfe14312e1f2

<?php

trait SitesConfigTrait
{
    public function getAllSiteNames(): array
    {
        return array_keys($this->getAllSitesConfig());
    }

    public function getSitesCount(): int
    {
        return count($this->getAllSitesConfig());
    }

}

Responsible rules

• CountOnNullRector

Expected Behavior

I expect no issue on this line since the called method getAllSiteNames() specifies a return type of array, but rector is behaving as if it could return NULL.