[issue42866] test test_multibytecodec: Test_IncrementalEncoder.test_subinterp() leaks references

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

PR 24165 fix one reference leak in the getcodec() function of CJK codecs. But it doesn't fix all ref leaks of this issue.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42866>
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