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bug#35939: version sort is incorrect with hyphen-minus
From: |
Ian Jackson |
Subject: |
bug#35939: version sort is incorrect with hyphen-minus |
Date: |
Thu, 27 Jun 2019 00:54:20 +0100 |
Ian Jackson writes ("Re: bug#35939: version sort is incorrect with
hyphen-minus"):
> Paul Eggert writes ("Re: bug#35939: version sort is incorrect with
> hyphen-minus"):
> > GNU sort uses the same algorithm as glibc strverscmp, and this algorithm
> > has
> > changed only once since strverscmp was added to glibc in 1997. The change
> > was
> > made in 2009, to fix this bug:
> >
> > https://sourceware.org/bugzilla/show_bug.cgi?id=9913
> >
> > Has the Debian version-comparison algorithm changed since 1997? If so,
> > could you
> > give details about the changes to the Debian algorithm? Perhaps glibc
> > should be
> > changed to stay consistent with Debian.
>
> Debian introduced a special (and very useful) meaning for ~, many
> years ago now.
>
> I checked the Debian policy manual and according to its upgrading
> checklist this change was made in 2007.
I have just checked the manpage I have here for strverscmp and it is
far from clear to me that the algorithm described there, and the dpkg
algorithm, produce the same answers. (Even disregarding ~, and the
fact that the specification of the dpkg algorithm is defined only over
a subset of possible strings even though the unique extension to UTF-8
strings is fairly obvious.)
--
Ian Jackson <address@hidden> These opinions are my own.
If I emailed you from an address @fyvzl.net or @evade.org.uk, that is
a private address which bypasses my fierce spamfilter.
bug#35939: version sort is incorrect with hyphen-minus, Ian Jackson, 2019/06/26
bug#35939: version sort is incorrect with hyphen-minus, Vincent Lefevre, 2019/06/26