bpo-37893: raise ValueError in pow if exponent is negative and modulus is +-1

[isidentical]

Check modulus and the exponent and if there is a case like exponent is negative and abs(modulus) is 1, raise a ValueError

https://bugs.python.org/issue37893

[tim-one]

Thanks! Added a comment about what appears to be a logic error.

[bedevere-bot]

A Python core developer has requested some changes be made to your pull request before we can consider merging it. If you could please address their requests along with any other requests in other reviews from core developers that would be appreciated.

Once you have made the requested changes, please leave a comment on this pull request containing the phrase I have made the requested changes; please review again. I will then notify any core developers who have left a review that you're ready for them to take another look at this pull request.

[mdickinson]

I've already commented on the issue, but for the record I'm (quite strongly) opposed to changing this. It's perfectly correct as it is.

[isidentical]

I have made the requested changes; please review again

[bedevere-bot]

Thanks for making the requested changes!

@tim-one: please review the changes made to this pull request.

[tim-one]

Thanks again! However, on the bpo report, Mark is opposed to this change, so I expect we'll have to abandon this. Sorry for the hassle!

[tim-one]

I'm closing this, since Mark gave a good case for leaving it alone. Thank you for the effort!