[PHP@master] Reflection method does not exist for private method from parent class

[kubawerlos]

Description

The following code:

<?php

class C1 { public function t1() {} }
class C2 { protected function t2() {} }
class C3 { private function t3() {} }

$method = new \ReflectionMethod(new class extends C1 {}, 't1'); // this is fine
$method = new \ReflectionMethod(new class extends C2 {}, 't2'); // this is fine
$method = new \ReflectionMethod(new class extends C3 {}, 't3'); // Fatal error: Uncaught ReflectionException: Method C3@anonymous::t3() does not exist

Resulted in this output:

Fatal error: Uncaught ReflectionException: Method C3@anonymous::t3() does not exist in /in/bJ2af:9
Stack trace:
#0 /in/bJ2af(9): ReflectionMethod->__construct(Object(C3@anonymous), 't3')
#1 {main}
  thrown in /in/bJ2af on line 9

Process exited with code 255.

But I expected this output instead:

It happens only on master branch, 8.2.3 is not affected.

https://3v4l.org/bJ2af/rfc#vgit.master

PHP Version

master

Operating System

No response

[damianwadley]

Private methods only exist on the classes that define them. The fact that it worked before was a bug, and it was fixed with #9470.