[1.30 beta] More chars considered alphanumeric in 1.30

[pietroalbini]

More chars are considered alphanumeric in 1.30 (like ²), so the test suite of a few crates is failing.

• munch 0.6.0 regressed from stable to beta (build log) cc @utkarshkukreti

[cuviper]

This appears to be a deliberate change, #51609.
cc @rust-lang/libs

[alexcrichton]

I've put this on our agenda to discuss, thanks for the cc!

[SimonSapin]

char::is_alphanumeric is only used in munch in a test. The test happened to use ² as a character where that method was expected to return false, but there doesn’t seem to be a reason why this couldn’t be any other character, like some punctuation. The test is not about alphanumeric-ness, that’s just a char -> bool function that happened to be readily available.

I was somewhat ambivalent about #51609, but now that it’s landed I don’t think this particular regression is something to worry about.

[alexcrichton]

Ok discussed during triage and we've decided to close, but again anyone please let us know if it's difficult to update!

[utkarshkukreti]

Hi! I'm the author of the only crate affected by this. This only breaks a couple of tests and not any actual functionality like SimonSapin said and I don't mind modifying the tests to accommodate this change.