python/mypy

Update fastparse for 3.9 AST changes

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msullivan commented

In 3.9.0a5, some changes landed to the AST for subscripting (python/cpython#9605). We need to support them.

This first got reported in #8614 as "syntax error in type comment", which is pretty bad, also! We should clean up that error message when we fix this.

cooperlees commented

If it helps, I've got CI failing 3.9.0a5 here with the same error: https://travis-ci.org/github/cooperlees/aioexabgp/jobs/673829413

  • If not, please ignore.
  • Happy to help test anything if needed

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gvanrossum commented

Do you need help with this? I reviewed the CPython change and I can probably figure out how to do this easily.

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jaraco commented

I'm attempting to test against Python 3.9b1, but the test suite is failing with the "syntax error in type comment". Does this patch fix it? Is a release planned?

JelleZijlstra commented

@jaraco on another issue Jukka said that another release is planned in a week or so.

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jaraco commented

I see v0.780 includes the fix for the issue.

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