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[Python-Dev] Another PEP 343 contextmanager glitch

[Python-Dev] Another PEP 343 contextmanager glitch [Python-Dev] Another PEP 343 contextmanager glitchPhillip J. Eby pje at telecommunity.com
Fri Mar 24 23:40:21 CET 2006
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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