[BUG] Extended classes can't access their private variables

[zsilbi]

Hey,

If a class - written in Zephir - contains private variables and extended in PHP, it won't be able to access those variables in its original methods.

I ran into this when I was trying to extend \Phalcon\Session\Manager and \Phalcon\Session\Bag in v4.0.0-alpha.4

Code to reproduce the issue:

/** Example.zep **/

class Example
{
    private privateVariable;

    public function setPrivateVariable(value)
    {
        let this->privateVariable = value;

        return this;
    }

    public function getPrivateVariable()
    {
        return this->privateVariable;
    }
}

In PHP it is extended without any new methods:

/** My/Example.php **/

namespace My;

class Example extends \Example {}

Test code:

$example = new \My\Example;
$example->setPrivateVariable('test');

var_dump($example->getPrivateVariable());

Result:

Notice: Undefined property: My\Example::$privateVariable

Changing private variables to protected solved the errors.

Zephir version: 0.11.12
PHP: 7.3.4 or 7.2.16 (tried both)

Thanks

[sergeyklay]

Thank you for the report. We'll try to sort out ASAP.