[issue25953] re fails to identify invalid numeric group references in replacement strings

[SilentGhost]

SilentGhost added the comment:

Well, at least on the surface of it, the fix seems pretty straightforward:
check for the group index. With this patch the behaviour is as expected, but I get two tests erroring out since they're expecting differently worded error. This probably needs adjustments to those tests as well as C code written.

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keywords: +patch
nosy: +SilentGhost
versions: +Python 3.6
Added file: http://bugs.python.org/file41422/issue25953.diff

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