[issue25268] Support pointing frozen modules to the corresponding source files, if available.

[Nick Coghlan]

Nick Coghlan added the comment:

I agree with Marc-Andrew that it's hard to do anything more useful here than "-r" already does, as we can assume the source code won't be available on the target machine - it's the equivalent of having C/C++ debugging symbols available for C/C++ traceback generation.

It may still be worth doing specifically for the sake of _frozen_importlib (as that usually *does* have the importlib._bootstrap code available at runtime), but I think it would be pretty specific to that particular case.

A more generally applicable feature would be a utility to take a traceback of the form created by -r (as shown by Marc-Andre above), and converting that back to a full traceback given a directory structure that matched the layout of the frozen modules.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25268>
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