[issue19772] str serialization of Message object may mutate the payload and CTE.

[Vajrasky Kok]

Vajrasky Kok added the comment:

> So why check specifically for 8bit and base64?

I was in hurry when creating this patch. I think that was part of the debug code. This patch was created with the purpose to illuminate the culprit of this bug. And it served its purpose.

After uploading this patch, I was about to refine the patch. Then I started to think about.... shouldn't there be a more elegant way to solve this problem? Cloning the msg after entering the flatten message? It is supposed to be a clean and simple solution. Then I hit the part where the boundary computation intentionally modifies the message object. Then I remembered the email API had too much magics on it. >.<

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19772>
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