[issue30600] Error message incorrect when index is called with keyword argument ("[].index(x=2)")

[SylvainDe]

SylvainDe added the comment:

Thanks Serhiy Storchaka for the tip! I am currently investigating how the argument clinic works. I have used git bisect to find when the issue got introduced.

commit fdd42c481edba4261f861fc1dfe24bbd79b5a17a
bpo-20185: Convert list object implementation to Argument Clinic. (#542)

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Added file: http://bugs.python.org/file46939/git_bisect_bpo30600.txt

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<http://bugs.python.org/issue30600>
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