RecursionError: maximum recursion depth exceeded when pickling

[EwoutH]

I would like to save the World object to analyze later, but when saving with either:

model1.uw.save("model1_uw.pickle")

or

import sys
sys.setrecursionlimit(1000000)  # Example: Set the limit to 1500, adjust as needed
with open("model_instance.pickle", "wb") as f:
    pickle.dump(model1.uw, f, protocol=pickle.HIGHEST_PROTOCOL)

It throws a RecursionError: maximum recursion depth exceeded message.

Reproduce

I don't have a minimal reproducible example yet, buy it can be observed by running model.py in this repo and adding model1.uw.save("model1_uw.pickle") at the bottom. The error can also be observed in this CI run.

[toruseo]

I believe this is a limitation of dill package for pickling. Is it possible to identify which object is causing this error? It may be possible to remove that object if it was too redundant.

[EwoutH]

It might be already solved upstream, possibly by uqfoundation/dill#667.

For my own research I found a workaround for now, and it's also not preferable in my case to have multiple 100+ MB model saves.

[toruseo]

New version of dill has been released. Can you check if this error persists?