[issue24931] _asdict breaks when inheriting from a namedtuple

[Eric Snow]

Eric Snow added the comment:

Doesn't the fix mean that `vars(MyNamedtuple)` will no longer work?  While I personally don't mind (though I prefer that spelling) and appreciate the benefit of simpler code, isn't there a backward-compatibility issue here?

I do concede that fixing this bug without a compatibility break is complicated and probably not worth it.  However I want to make sure that the point is at least discussed briefly.

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nosy: +eric.snow

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<http://bugs.python.org/issue24931>
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