GNU bug report logs -
#21844
`sort` behavior unstable based on neighboring elements ?
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Reported by: Mike Frysinger <vapier <at> gentoo.org>
Date: Fri, 6 Nov 2015 16:43:02 UTC
Severity: normal
Tags: notabug
Done: Assaf Gordon <assafgordon <at> gmail.com>
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(Fri, 06 Nov 2015 16:43:02 GMT)
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i got this bug report today about sort mismatches. the order of the
inputs changes the order of the outputs which surprised me. but it
might be a nuance of unicode collation i'm not familiar with ?
$ printf '%s\n' aarch64 abc zed | LC_ALL=nb_NO.UTF-8 sort -u
aarch64
abc
zed
$ printf '%s\n' abc aarch64 zed | LC_ALL=nb_NO.UTF-8 sort -u
abc
zed
aarch64
why aren't the outputs here the same ? a nordic user pointed out
that aa is an alternative for å which comes after z, which is fine,
but that doesn't explain why the output isn't the same here.
-mike
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Message #8 received at submit <at> debbugs.gnu.org (full text, mbox):
tag 21844 notabug
close 21844
stop
On 06/11/15 16:41, Mike Frysinger wrote:
> i got this bug report today about sort mismatches. the order of the
> inputs changes the order of the outputs which surprised me. but it
> might be a nuance of unicode collation i'm not familiar with ?
>
> $ printf '%s\n' aarch64 abc zed | LC_ALL=nb_NO.UTF-8 sort -u
> aarch64
> abc
> zed
> $ printf '%s\n' abc aarch64 zed | LC_ALL=nb_NO.UTF-8 sort -u
> abc
> zed
> aarch64
>
> why aren't the outputs here the same ? a nordic user pointed out
> that aa is an alternative for å which comes after z, which is fine,
> but that doesn't explain why the output isn't the same here.
> -mike
strcoll is giving the wrong results:
$ printf '%s\n' abc aarch64 zed | LC_ALL=nb_NO.UTF-8 ltrace -e strcoll sort >/dev/null
sort->strcoll("aarch64", "zed") = 3
sort->strcoll("abc", "zed") = -25
$ printf '%s\n' aarch64 abc zed | LC_ALL=nb_NO.UTF-8 ltrace -e strcoll sort >/dev/null
sort->strcoll("abc", "zed") = -25
sort->strcoll("aarch64", "abc") = -1
I think this is due to:
https://sourceware.org/bugzilla/show_bug.cgi?id=18589
Fixed by:
https://sourceware.org/git/?p=glibc.git;a=commit;h=87701a58
cheers,
Pádraig.
Added tag(s) notabug.
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(Wed, 24 Oct 2018 21:17:02 GMT)
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bug closed, send any further explanations to
21844 <at> debbugs.gnu.org and Mike Frysinger <vapier <at> gentoo.org>
Request was from
Assaf Gordon <assafgordon <at> gmail.com>
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control <at> debbugs.gnu.org
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(Wed, 24 Oct 2018 21:17:02 GMT)
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bug archived.
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(Thu, 22 Nov 2018 12:24:08 GMT)
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This bug report was last modified 5 years and 291 days ago.
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