[issue22676] _pickle's whichmodule() is slow

[STINNER Victor]

STINNER Victor added the comment:

On Windows with Visual Studio, I got a compiler warning. In whichmodule(), get_dotted_path() is called with module whereas module is not initialiazed:

    dotted_path = get_dotted_path(module, global_name, allow_qualname);

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22676>
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