Your message dated Wed, 07 Dec 2016 17:04:21 +0000
with message-id <[email protected]>
and subject line Bug#844286: fixed in grep 2.27-1
has caused the Debian Bug report #844286,
regarding grep: Non-deterministic behavior when output redirected to /dev/null
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
844286: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=844286
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: grep
Version: 2.26-1
Severity: grave
Tags: upstream
Justification: renders package unusable
Upstream commit af6af288 causes inconsistent results when output is
redirected to /dev/null. I'm setting this to grave because grep is a
very common glue and if its results aren't reliable, then there's lots
of unknown behavior that may exhibit from things using it.
Unfortunately, the simplest test case I've been able to find so far is a
script from neovim's source package.
$ git clone https://github.com/neovim/neovim
$ cd neovim
$ ./scripts/vim-patch.sh -l
When grep is working properly (i.e., with af6af288 reverted), this
should start printing out numbers starting around 7.4.1559. Instead, it
is printing out numbers starting around 7.4.630.
The relevant part of the script is just looking for whether patch
numbers are applied or marked NA in neovim's src/nvim/version.c:
is_missing="$(sed -n '/static int included_patches/,/}/p'
"${NVIM_SOURCE_DIR}/src/nvim/version.c" |
grep -x -e "[[:space:]]*//[[:space:]]${patch_number} NA.*" -e
"[[:space:]]*${patch_number}," >/dev/null && echo "false" || echo "true")"
The worrisome part about this is that the behavior isn't consistent:
$ diff -u <(flock . ./scripts/vim-patch.sh -l) <(flock .
./scripts/vim-patch.sh -l) | diffstat
14 | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
$ diff -u <(flock . ./scripts/vim-patch.sh -l) <(flock .
./scripts/vim-patch.sh -l) | diffstat
14 | 4 ----
1 file changed, 4 deletions(-)
Other problems I've seen reported related to this:
- Vim's build leaves behind random files[0]
- Slackware's upgradepkg fails to remove the old package after
upgrade[1]
[0]: https://www.mail-archive.com/[email protected]/msg42764.html
[1]:
https://www.linuxquestions.org/questions/slackware-14/pkgtools-grep-bug-in-slackware%5B64%5D-current-4175593054/
-- System Information:
Debian Release: stretch/sid
APT prefers unstable-debug
APT policy: (500, 'unstable-debug'), (500, 'unstable'), (1,
'experimental-debug'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.7.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages grep depends on:
ii dpkg 1.18.14
ii libc6 2.24-5
ii libpcre3 2:8.39-2
grep recommends no packages.
Versions of packages grep suggests:
ii libpcre3 2:8.39-2
-- no debconf information
--- End Message ---
--- Begin Message ---
Source: grep
Source-Version: 2.27-1
We believe that the bug you reported is fixed in the latest version of
grep, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Santiago Ruano Rincón <[email protected]> (supplier of updated grep package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Wed, 07 Dec 2016 17:31:23 +0100
Source: grep
Binary: grep
Architecture: source
Version: 2.27-1
Distribution: unstable
Urgency: low
Maintainer: Anibal Monsalve Salazar <[email protected]>
Changed-By: Santiago Ruano Rincón <[email protected]>
Description:
grep - GNU grep, egrep and fgrep
Closes: 831673 844286
Changes:
grep (2.27-1) unstable; urgency=low
.
* New upstream release.
* Improve documentation on context and matching lines. (Closes: #831673).
* Fix non-deterministic behavior when output redirected to /dev/null
(Closes: #844286).
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