wrong nullability information when returning "void"

[jakubmisek]

te following function is emitted with the wrong Nullable attribute,

class Test
{
    final function multidimensional( $root, $keys ) { // <-- wrong nullability attribute
        if (empty($root)) return; // void
        return [1,2,3];
    }

    function multidimensional_get( $root, $keys, $default = null ) {
		$result = $this->multidimensional( $root, $keys ); // does not expect to return null
		return isset( $result ) ? $result['node'] : $default; // isset() evaluated to TRUE always
	}
    
}

echo (new Test)->multidimensional_get(false, false, "ok");

[jakubmisek]

fixed in 895b5f8