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Sat Mar 25 00:05:46 CET 2006 · https://mail.python.org/pipermail/python-dev/2006-March/062804.html

Oops, that's definitely a bug. Please go ahead and fix in both places.

(I'm still trying to fathom the other PEP 343 issue you brought up.)

--Guido

On 3/24/06, Phillip J. Eby <pje at telecommunity.com> wrote:
> It appears that the contextmanager implementation (both in the stdlib and
> as described in the PEP) doesn't correctly handle the case where the
> generator yields a new value in response to throw().  It responds by
> suppressing the original exception, but IIRC earlier versions of the PEP
> threw a RuntimeError for this scenario.
>
> Unless there are any objections, I'd like to restore this by replacing the
> "return True" that follows the throw(), with:
>
>      raise RuntimeError("generator didn't stop after throw()")
>
> and again, update the PEP accordingly.
>
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--
--Guido van Rossum (home page: http://www.python.org/~guido/)

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[Python-Dev] Another PEP 343 contextmanager glitch