Private and protected properties don't raise errors when accessed from invalid scope

[Dylan T.]

Environment

• PHP: 7.2.9
• pthreads: master
• OS: windows

Reproducing Code

class B extends \Threaded{
	private $a = 1;
	protected $b = 2;
}

$b = new B;
var_dump($b->a);
var_dump($b->b);

Expected Output

Fatal error: Uncaught Error: Cannot access private property B::$a

Actual Output

int(1)
int(2)

[Thomas Punt]

I noticed this some time ago too. In my initial implementation of the Actor model (which followed pthreads' approach to data sharing, and therefore required a backing property store for actors), I had the following code for this:
https://github.com/tpunt/phactor/blob/9afaa2fd128bde32574b0206c9a1cdc70eda3dc7/ph_prop_store.c#L47-L87

I expect the general logic for it can be reused here.