[Bug 1038468] Re: data loss on sort -u

Colin Watson cjwatson at canonical.com
Wed Sep 5 15:49:34 UTC 2012

** Changed in: coreutils (Ubuntu Precise)
     Assignee: (unassigned) => Colin Watson (cjwatson)

** Changed in: coreutils (Ubuntu Quantal)
     Assignee: (unassigned) => Colin Watson (cjwatson)

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  data loss on sort -u

Status in “coreutils” package in Ubuntu:
Status in “coreutils” source package in Precise:
Status in “coreutils” source package in Quantal:
Status in “coreutils” package in Debian:

Bug description:
  Last year a bug was reported to upstream coreutils [1] about problems
  on using 'sort -u'. Until recently, there was no known reproducing
  process; one such process was published last week [2].

  Although triggering the bug can be said to be a non-completely trivial
  use case, data loss in 'sort' should be looked at as a serious issue.

  Today Jim Meyering committed what looks like the final touches of the
  fix (incidentally also solving a different issue (a free memory read),
  also in 'sort'. There are 4 commits affected, and they are shown
  starting in [3].

  Given this is a data loss potential, I am opening this bug for all
  affected releases (this bug affects Coreutils 8.6 onwards -- Precise
  and Quantal). I am still to run the tests on Lucid, Natty, and

  [1] http://debbugs.gnu.org/cgi/bugreport.cgi?bug=9780
  [2]  http://lists.gnu.org/archive/html/bug-coreutils/2012-08/msg00027.html
  [3] http://lists.gnu.org/archive/html/bug-coreutils/2012-08/msg00057.html

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