https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=213128
Bug ID: 213128
Summary: version sort (sort -V) order incorrect with
non-alphanumeric characters
Product: Base System
Version: 10.3-RELEASE
Hardware: i386
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
CC: [email protected]
On FreeBSD 10.3-RELEASE-p9 with /usr/bin/sort version 2.3-FreeBSD:
Version-sorting produces incorrect order if non-alphanumeric characters are
present in sorted lines. Prefix (name) parts of the sorted lines sharing the
same starting characters are seemingly sorted in the reverse order. This is an
example from my package folder:
$ ls /usr/ports/packages/All | sort -V
…
pkgconf-0.9.12_1.txz
pkgconf-1.0.1.txz
pkg-1.6.4_1.txz
pkg-1.7.1.txz
pkg-1.7.2.txz
…
To reproduce the behaviour, the following can be done. The next two commands
produce identical and correct output:
$ echo -e "aa\nab\nabcdefg\nabd\nabcde\nabc\nabcdef"|sort
aa
ab
abc
abcde
abcdef
abcdefg
abd
And
$ echo -e "aa\nab\nabcdefg\nabd\nabcde\nabc\nabcdef"|sort -V
aa
ab
abc
abcde
abcdef
abcdefg
abd
However, the second of these two produces clearly incorrect sort order:
$ echo -e "aa-\nab-\nabcdefg-\nabd-\nabcde-\nabc-\nabcdef-“|sort
aa-
ab-
abc-
abcde-
abcdef-
abcdefg-
abd-
But
$ echo -e "ab-\nabcdefg-\nabd-\nabcde-\nabc-\nabcdef-"|sort -V
abcdefg-
abcdef-
abcde-
abc-
abd-
ab-
The same behaviour is observed when different non-alphanumeric characters are
appended to the end of the sorted strings:
echo -e "ab-\nabcdefg&\nabd#\nabcde@\nabc&\nabcdef_"|sort -V
abcdefg&
abcdef_
abcde@
abc&
abd#
ab-
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