[issue41756] Do not always use exceptions to return result from coroutine

[Stefan Behnel]

Stefan Behnel <stefan_ml at behnel.de> added the comment:

I would also have preferred a more type specific function, but yeah, as long as the types for which the function would normally be used are special cased early enough in the implementation, it makes no big difference.

Fine with me, too.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue41756>
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