Fix "ValueError" using Loguru with Cython (when missing stack frame)

[Delgan]

Fix #88.
Fix #680.

In Cython, calling logger.info() used to cause a ValueError("call stack is not deep enough") which happens because of Cython optimizations.

As a workaround, this PR wraps the call into a try / except clause and generate "dummy" information if the frame failed to be retrieve:

• module name -> None
• file name -> "<unknown>"
• function name -> "<unknown>"
• line no -> 0

Not ideal, but certainly better than if Loguru didn't work at all.

Example of output:

2024-11-26 15:58:48.985 | INFO | None:<unknown>:0 - Message from Cython!

[namoshizun]

This is awesome!! We've been stuck on the "depth=-1' workaround for quite some time. All of our code has to be compiled using Cython due to proprietary requirements. Can we expect a new release that contains this fix soon 😉 ?

[Delgan]

@namoshizun Probably before the end of the week if all goes well. 👍

You can also test it in advance (and report me any bug) by installing loguru from the repo directly:

pip install git+https://github.com/delgan/loguru@ab33cc0101129721cd024b8a63c4059cbc8844d1