Re: [PATCH] Keep expected behaviour for [a-z] and [A-z] (Bug 23393).

[Jonathan Nieder <jrnieder at gmail dot com>]

Carlos O'Donell wrote:
> On 07/25/2018 09:33 PM, Jonathan Nieder wrote:

>> The Debian system where it is most convenient for me to test has
>> Debian's libc6 package, version 2.24-12.  [a-z] matches uppercase
>> letters.  I've always considered that undesirable but I'm confused
>> about the described regression.  Did one of Debian's patches to
>> localedata cause it to pick up the regression early (by which I mean,
>> more than 5 years ago)?
>
> It depends entirely on the locale you use. Some locales already have
> [a-z] matching uppercase and have had it for years. The problem is that
> this is new for en_US.UTF-8.
>
> Which locale did you use? en_US.UTF-8? If so, then yes, Debian must have
> done something different with iso14651_t1_common to change this, or added
> something else. I did a quick look at the debian patches for 2.24-12 and
> didn't see anything that would change this materially for en_US.

I tried with the following locales:

 en_US:		matches (bad)
 en_US.UTF-8:	matches (bad)
 C:		does not match (good)
 C.UTF-8:	does not match (good)
 fr_CH:		matches (bad)
 fr_CH.UTF-8:	matches (bad)

Looking over
https://salsa.debian.org/glibc-team/glibc/tree/sid/debian/patches/localedata
and https://salsa.debian.org/glibc-team/glibc/tree/sid/debian/patches/locale,
I don't see any obvious culprits.  Anyway, please just take this as more
feedback in favor of your approach.

See the user reports merged with https://bugs.debian.org/301717.

Thanks,
Jonathan