[issue23247] Crash in the reset() method of StreamWriter of CJK codecs

[Aaron Hill]

Aaron Hill added the comment:

The included patch fixes the issue, and modifies the existing unittest to prevent a future regression.

The patch corrects an issue where the 'pending' struct field was NULL, but was used as the input to multibytecodec_encode anyay.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23247>
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