[issue32797] Tracebacks from Cython modules no longer work

[Jeroen Demeyer]

Jeroen Demeyer <J.Demeyer at UGent.be> added the comment:

Alternatively, instead of not implementing `loader.get_source()`, we could define a new semantic: if it returns `NotImplemented`, assume that the loader doesn't know how to get the sources. In that case, linecache would fall back to the old behaviour.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32797>
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