Re: texi2dvi: locale-dependent error in egrep [A-z]

[Karl Berry]

Hi Martin,

    LC_ALL=de_DE.utf8 /usr/bin/texi2dvi /some/path/and/file.texi
    egrep: Invalid range end
    1686:  echo "$command_line_filename" | $EGREP '^(/|[A-z]:/)' >&6 \

Thanks for the report.  I changed it to [A-Za-z] but I don't actually
understand why [A-z] is invalid in UTF-8, including American English UTF-8.

$ env LC_ALL=en_US.utf8 grep '[A-z]' /etc/issue
grep: Invalid range end

UTF-8 is the same as ASCII in this area, so where's the beef?
Can you (or anyone) here explain?

Of course I know that [A-z] includes the ASCII characters between Z
and a, namely  [\]^_`  which technically aren't allowed as DOS drive
letters, so the range has always been incorrect in that sense, but I
don't see why it's an "invalid range end" in UTF8 (and not "C").

Thanks,
k