Comment 9 for bug 1928581

I'm also affected by this bug, and after some investigation I found out that the only reason you do not see this assert on Ubuntu is because the Ubuntu build disables all asserts by the -DNDEBUG that leaks into CFLAGS from the python build.

I created a small Dockerfile that reliably show how to reproduce the issue on Ubuntu jammy, simply by undefining NDEBUG when building the breezy package:

https://gist.githubusercontent.com/zeldin/166c88b95af28fe8b2583ee76cb2e470/raw/8d3bd2ee68be4a4f8d38600a37477b3539279779/Dockerfile

Hope this helps.