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[Mathew Hodson <mathew.hodson@xxxxxxxxx>]

*** This bug is a duplicate of bug 671972 ***
    https://bugs.launchpad.net/bugs/671972

** This bug has been marked a duplicate of bug 671972
   Cannot extract lzma compressed archives created with tar

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https://bugs.launchpad.net/bugs/1059685

Title:
  tar hijacks lzma

Status in tar package in Ubuntu:
  Confirmed

Bug description:
  0 jan@muizenberg:/var/autofs/misc/home/jan$lsb_release -d
  Description:	Ubuntu 12.04.1 LTS
  0 jan@muizenberg:/var/autofs/misc/home/jan$dpkg -l tar|tail -1
  ii  tar                                             1.26-4ubuntu1                           GNU version of the tar archiving utility
  0 jan@muizenberg:/var/autofs/misc/home/jan$dpkg -l |grep xz-lzma
  ii  xz-lzma                                         5.1.1alpha+20110809-3                   XZ-format compression utilities - compatibility commands
  0 jan@muizenberg:/var/autofs/misc/home/jan$tar --lzma -cf pgd-essay-template.tar.lzma pgd-essay-template.tar
  0 jan@muizenberg:/var/autofs/misc/home/jan$unlzma pgd-essay-template.tar.lzma 
  unlzma: pgd-essay-template.tar.lzma: File format not recognised
  1 jan@muizenberg:/var/autofs/misc/home/jan$file pgd-essay-template.tar.lzma 
  pgd-essay-template.tar.lzma: XZ compressed data
  0 jan@muizenberg:/var/autofs/misc/home/jan$rm pgd-essay-template.tar
  0 jan@muizenberg:/var/autofs/misc/home/jan$unxz pgd-essay-template.tar.lzma 
  0 jan@muizenberg:/var/autofs/misc/home/jan$sudo apt-get install lzma
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  The following packages will be REMOVED
    xz-lzma
  The following NEW packages will be installed
    lzma
  0 upgraded, 1 newly installed, 1 to remove and 0 not upgraded.
  Need to get 52,2 kB of archives.
  After this operation, 18,4 kB disk space will be freed.
  Do you want to continue [Y/n]? y
  Get:1 http://za.archive.ubuntu.com/ubuntu/ precise/main lzma amd64 9.22-2ubuntu1 [52,2 kB]
  Fetched 52,2 kB in 0s (53,1 kB/s)
  (Reading database ... 695021 files and directories currently installed.)
  Removing xz-lzma ...
  Processing triggers for man-db ...
  Selecting previously unselected package lzma.
  (Reading database ... 694994 files and directories currently installed.)
  Unpacking lzma (from .../lzma_9.22-2ubuntu1_amd64.deb) ...
  Processing triggers for man-db ...
  Setting up lzma (9.22-2ubuntu1) ...
  update-alternatives: using /usr/bin/lzmp to provide /usr/bin/lzma (lzma) in auto mode.
  0 jan@muizenberg:/var/autofs/misc/home/jan$tar --lzma -cf pgd-essay-template.tar.lzma pgd-essay-template.tar
  0 jan@muizenberg:/var/autofs/misc/home/jan$rm pgd-essay-template.tar
  0 jan@muizenberg:/var/autofs/misc/home/jan$unlzma pgd-essay-template.tar.lzma
  unlzma: SetDecoderProperties() error
  1 jan@muizenberg:/var/autofs/misc/home/jan$unxz pgd-essay-template.tar.lzma 
  0 jan@muizenberg:/var/autofs/misc/home/jan$

  Whether xz-lzma or lzma is installede, these errors are passed to file-roller, meaning
  end users using GUI interfaces like unity, nautilus, and file-roller cannot open lzma
  files created by tar, as they are actually xz files.

  Note files created by lzma (and not by tar -J or tar --lzma) work fine, again with either
  lzma and xz-lzma installed:

  0 jan@muizenberg:/var/autofs/misc/home/jan$dpkg -l lzma|tail -1
  ii  lzma                                            9.22-2ubuntu1                           Compression and decompression in the LZMA format - command line utility
  0 jan@muizenberg:/var/autofs/misc/home/jan$lzma pgd-essay-template.tar
  0 jan@muizenberg:/var/autofs/misc/home/jan$file pgd-essay-template.tar.lzma 
  pgd-essay-template.tar.lzma: LZMA compressed data, non-streamed, size 1863680
  0 jan@muizenberg:/var/autofs/misc/home/jan$unlzma pgd-essay-template.tar.lzma 
  0 jan@muizenberg:/var/autofs/misc/home/jan$sudo apt-get install xz-lzma 
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  The following packages will be REMOVED
    lzma
  The following NEW packages will be installed
    xz-lzma
  0 upgraded, 1 newly installed, 1 to remove and 0 not upgraded.
  Need to get 12,4 kB of archives.
  After this operation, 18,4 kB of additional disk space will be used.
  Do you want to continue [Y/n]? y
  Get:1 http://za.archive.ubuntu.com/ubuntu/ precise/main xz-lzma all 5.1.1alpha+20110809-3 [12,4 kB]
  Fetched 12,4 kB in 0s (12,7 kB/s)   
  (Reading database ... 694999 files and directories currently installed.)
  Removing lzma ...
  Processing triggers for man-db ...
  Selecting previously unselected package xz-lzma.
  (Reading database ... 694994 files and directories currently installed.)
  Unpacking xz-lzma (from .../xz-lzma_5.1.1alpha+20110809-3_all.deb) ...
  Processing triggers for man-db ...
  Setting up xz-lzma (5.1.1alpha+20110809-3) ...
  0 jan@muizenberg:/var/autofs/misc/home/jan$lzma pgd-essay-template.tar
  0 jan@muizenberg:/var/autofs/misc/home/jan$file pgd-essay-template.tar.lzma 
  pgd-essay-template.tar.lzma: LZMA compressed data, streamed
  0 jan@muizenberg:/var/autofs/misc/home/jan$unlzma pgd-essay-template.tar.lzma 
  0 jan@muizenberg:/var/autofs/misc/home/jan$

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