[issue22362] Warn about octal escapes > 0o377 in re

[STINNER Victor]

STINNER Victor added the comment:

re_octal_escape_overflow_raise.patch: you should write a subfunction to not repeat the error message 3 times.

+            if c > 0o377:

Hum, I never use octal. 255 instead of 0o377 would be less surprising :-p By the way, you should also check for negative numbers.

>>> -3 & 0xff
253

Before, "& 0xff" also converted negative numbers to positive in range 0..255.

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nosy: +haypo

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<http://bugs.python.org/issue22362>
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