[issue42526] Exceptions in asyncio.Server callbacks are not retrievable

[Tom]

Tom <tom at collider.in> added the comment:

How do you suggest one might test code in a Server callback with asyncio?

Of course, I don't want any old exception to affect another client connection,
only an exception which is uncaught up to the handler coro. And I'm not
suggesting that it happen by default, only that it be possible.

With this, the behaviour would perfectly align with the asyncio.gather
functionality, and its 'return_exceptions' kwarg.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42526>
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