[issue42725] PEP 563: Should the behavior change for yield/yield from's

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

There is no “expr-without-await-or-async-for” subgrammar, but "await" and asynchronous comprehensions are invalid in synchronous functions. There should be similar flag for annotations in symtable.c.

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<https://bugs.python.org/issue42725>
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