I'm wondering if enough was updated. IPython.core.oinspect calls inspect.getsource() and inspect.getsourcelines() as well, and under the hood these use inspect.getfile() just like inspect.getabsfile() does:

• inspect.getsource() delegates to inspect.getsourcelines() and joins the result.
• inspect.getsourcelines() calls inspect.findsource():
  • inspect.findsource() calls inspect.getsourcefile() first:
    • inspect.getsourcefile() calls inspect.getfile() -> can raise OSError.
  • if inspect.findsource() returned a false-y result, inspect.getfile() is called directly -> can raise OSError.

but the calls in IPython.core.oinspect to these two functions have not been updated yet to handle OSError.

@mjpieters oinspect.find_file dodged the issue because it catches everything, but oinspect.getsource is affected. I opened PR #13371 with a fix.