[Bug 1038024] [NEW] tar considers tar.gz as tar and fails

[Nokir]

Public bug reported:

I tired to open http://pkgs.fedoraproject.org/repo/pkgs/xscreensaver/xscreensaver-5.19.tar.gz/db001e7d17b68fef22f66beb68beb114/xscreensaver-5.19.tar.gz with
$ tar -tf xscreensaver-5.19.tar.gz
I get the following:

tar: This does not look like a tar archive
tar: Skipping to next header
tar: Exiting with failure status due to previous errors

But this works:

$ gzip -d xscreensaver-5.19.tar.gz
$ tar -tf xscreensaver-5.19.tar

This works too:

$ tar -tf xscreensaver-5.18.tar.gz
with the file from http://pkgs.fedoraproject.org/repo/pkgs/xscreensaver/xscreensaver-5.18.tar.gz/92eccee4bf6cd8bc6c0de98c1b3107fa/xscreensaver-5.18.tar.gz

So tar can open tar.gz files and xscreensaver-5.19.tar.gz is readable,
but tar can't open this file.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: tar 1.26-4ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-27.43-generic 3.2.21
Uname: Linux 3.2.0-27-generic x86_64
ApportVersion: 2.0.1-0ubuntu12
Architecture: amd64
Date: Fri Aug 17 12:21:13 2012
InstallationMedia: Xubuntu 11.04 "Natty Narwhal" - Release amd64 (20110426.1)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: tar
UpgradeStatus: Upgraded to precise on 2012-05-02 (107 days ago)

** Affects: tar (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug precise

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https://bugs.launchpad.net/bugs/1038024

Title:
  tar considers tar.gz as tar and fails

Status in “tar” package in Ubuntu:
  New

Bug description:
  I tired to open http://pkgs.fedoraproject.org/repo/pkgs/xscreensaver/xscreensaver-5.19.tar.gz/db001e7d17b68fef22f66beb68beb114/xscreensaver-5.19.tar.gz with
  $ tar -tf xscreensaver-5.19.tar.gz
  I get the following:

  tar: This does not look like a tar archive
  tar: Skipping to next header
  tar: Exiting with failure status due to previous errors

  But this works:

  $ gzip -d xscreensaver-5.19.tar.gz
  $ tar -tf xscreensaver-5.19.tar

  This works too:

  $ tar -tf xscreensaver-5.18.tar.gz
  with the file from http://pkgs.fedoraproject.org/repo/pkgs/xscreensaver/xscreensaver-5.18.tar.gz/92eccee4bf6cd8bc6c0de98c1b3107fa/xscreensaver-5.18.tar.gz

  So tar can open tar.gz files and xscreensaver-5.19.tar.gz is readable,
  but tar can't open this file.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: tar 1.26-4ubuntu1
  ProcVersionSignature: Ubuntu 3.2.0-27.43-generic 3.2.21
  Uname: Linux 3.2.0-27-generic x86_64
  ApportVersion: 2.0.1-0ubuntu12
  Architecture: amd64
  Date: Fri Aug 17 12:21:13 2012
  InstallationMedia: Xubuntu 11.04 "Natty Narwhal" - Release amd64 (20110426.1)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  SourcePackage: tar
  UpgradeStatus: Upgraded to precise on 2012-05-02 (107 days ago)

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