Hi!

While rebuilding the python related packages against the Python 3.15rc2 version we found that rpyc fails to build from source [1].

The error is: AttributeError: cannot access 'MyClass'

This is caused by using deprecated co_lnotab, and can be solved by migrating to co_linetable. I have created a patch for this.

I've applied the fix in the sandbox [2] to verify that it builds successfully, please consider applying the patch to support the upcoming 3.15 version.

Setting the severity to important for now. Once Python 3.15 is released, it will be added to python3-defaults and this bug will become release critical.

Happy hacking,

[1]: https://debusine.debian.net/debian/r-python-python3.15/artifact/4855987/
[2]: https://debusine.debian.net/debian/r-python-python3.15/