[issue35894] Apparent regression in 3.8-dev: 'TypeError: required field "type_ignores" missing from Module'

[Guido van Rossum]

Guido van Rossum <guido at python.org> added the comment:

> [T]here's other optional fields in the ast, type ignores don't seem essential to the `Module`, could those be made optional as well?

I think you're referring to the `?` syntax in `Python.asdl`.  But the `type_ignores` attribute is already a list (using `*`) and AFAICT you cannot combine `?` and `*`.  You have to provide an empty list.

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<https://bugs.python.org/issue35894>
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