[issue28765] _sre.compile(): be more strict on types of indexgroup and groupindex

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka+cpython at gmail.com>:


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superseder:  -> _sre.compile(): be more strict on types of indexgroup and groupindex

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28765>
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