gunzip ignores 'n' when asked to overwrite file

[Ben Cordes]

Steps to repro:
% echo overwritten > test
% gzip test
% echo clean > test
% cat test
clean
% gunzip test.gz
gzip: test already exists; do you wish to overwrite (y or n)? n
% cat test
overwritten
%

This bug seems to have been reported in several other places as a compiler optimization bug (saw one reference to GCC 4.7 x86-64 -O2). It's possible that it's been fixed in upstream already.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: gzip 1.5-1.1ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-27.46-generic 3.5.7.7
Uname: Linux 3.5.0-27-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu10
Architecture: amd64
Date: Thu Apr 11 12:45:38 2013
InstallationDate: Installed on 2012-04-13 (363 days ago)
InstallationMedia: Ubuntu 10.04.2 LTS "Lucid Lynx" - Release amd64 (20110211.3)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US
 SHELL=/bin/bash
SourcePackage: gzip
UpgradeStatus: Upgraded to quantal on 2012-11-09 (152 days ago)

[Andrew McCarthy (andrewmccarthy)]

Fixed in gzip 1.6-1. Oldest version in a supported version of Ubuntu is 1.6-3ubuntu1 (in Trusty).