DeepComparer returns false when compares null with null

[forrest79]

Hi,

I found out, that this code returns false: var_dump(DeepComparer::isEqual(null, null));.

I used temporary fix in our repo:

        $isLeftScalar = is_scalar($left) || is_null($left);
        $isRightScalar = is_scalar($right) || is_null($right);

[github-actions]

🚀 @forrest79, thanks for your contribution! Every idea, bug report, and discussion helps make this project better. Your input is invaluable, and we appreciate the time you took to share it. A maintainer will review it soon—stay awesome! 💡✨

⭐ Enjoying contributing? Star the project! ⭐Your contributions help this project grow, and we'd love your support in another way too! If you find this repo helpful, consider leaving a star 🌟 on GitHub.

[nicosp]

Had the same issue as well. I fixed it by adding this at the beginning of DeepComparer::isEqual:

if ($left === null && $right === null) {
    return true;
}

Not sure if this is the right fix but it works.

[DannyvdSluijs]

This was fixed in #807 and version 6.3.1 was just released containing this fix.