[issue27364] Deprecate invalid unicode escape sequences

[Emanuel Barry]

Emanuel Barry added the comment:

I think ultimately a SyntaxError should be fine. I don't know *when* it becomes appropriate to change a warning into an error; I was thinking 3.7 but, as Serhiy said, there's no rush. I think waiting five release cycles is overkill though, that means the error won't be until 8 years from now (assuming release cycle periods don't change)! I think at most 3.8 should be fine for making this a full-on syntax error.

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<http://bugs.python.org/issue27364>
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