[Bug] Warning about registry on jac run

[ypkang]

Describe the bug

This is happening on the tobu project. on Jac run, it will show many lines of the following warnings

WARNING -  /Users/yipingkang/projects/tobu-mvp/jac2/memory.jac, line 1, col 1: Can't save registry for memory: maximum recursion depth exceeded while pickling an object

The warnings go away when the registry pass is disabled.

Is this a regression?

Yes

0.5.18. Not sure if this was the last version that did not have this bug. This is what I have been using before.

Expected behaviour

There shouldn't be these warnings.

To Reproduce

(e.g.:)

1. Contact @ypkang to get access to the Tobu code to reproduce this.
2. jac run tobu_main.jac

Your environment

• OS: macos
• Python version: 3.12
• Jaclang version: 0.7.18