[Bug 1553770] Re: apt-utils: xz support is gone.

[Bug Watch Updater]

** Changed in: apt (Debian)
       Status: New => Fix Released

** Changed in: apt (Debian)
   Importance: Undecided => Unknown

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https://bugs.launchpad.net/bugs/1553770

Title:
  apt-utils: xz support is gone.

Status in apt package in Ubuntu:
  New
Status in apt source package in Trusty:
  New
Status in apt package in Debian:
  Fix Released

Bug description:
  Stable release update justification:

  [Impact] apt-ftparchive fails to produce .xz compressed files with sufficiently large data sets.  This prevents migration of the Ubuntu archive to .xz.
  [Test Case] Grab trusty/main/amd64 with debmirror, construct a suitable file list, and ask apt-ftparchive to generate files for this with Packages::Compress set to include xz.  We can easily test this on the Launchpad "dogfood" instance where we do QA of the archive publisher.
  [Regression Potential] Confined to lzma/xz compression, which I think is basically just apt-ftparchive, but we should make sure that other compression methods still work there.

  Original report follows:

  Imported from Debian bug http://bugs.debian.org/751688:

  Package: apt-utils
  Version: 0.9.15.5
  Severity: normal

  Dear Maintainer,

  Tested with 1.0.4 and reinstalled working 0.9.15.5

  Packages::Compress seems to not work anymore with xz compression.

  Only . (uncompressed), gzip and bzip2 seems to work, xz now return errors
  (see at the bottom).

  Same error with Sources::Compress

  Christian

  $ apt-ftparchive generate apt.conf
   dists/unstable/main/binary-amd64/:E: write, still have 32768 to write but
  couldn't
  E: IO to subprocess/file failed - write (0: Success)
  E: write, still have 32768 to write but couldn't
  E: IO to subprocess/file failed - write (0: Success)
  E: write, still have 4096 to write but couldn't
  E: IO to subprocess/file failed - write (0: Success)
  E: write, still have 4096 to write but couldn't
  E: IO to subprocess/file failed - write (0: Success)
  E: write, still have 4096 to write but couldn't
  E: IO to subprocess/file failed - write (0: Success)
  E: write, still have 4096 to write but couldn't
  E: IO to subprocess/file failed - write (0: Success)
  E: write, still have 4096 to write but couldn't
  E: IO to subprocess/file failed - write (0: Success)
  E: write, still have 4096 to write but couldn't
  E: IO to subprocess/file failed - write (0: Success)
  E: write, still have 4096 to write but couldn't
  E: IO to subprocess/file failed - write (0: Success)
  E: write, still have 4096 to write but couldn't
  E: IO to subprocess/file failed - write (0: Success)
  E: write, still have 4096 to write but couldn't
  E: IO to subprocess/file failed - write (0: Success)
  E: write, still have 4096 to write but couldn't
  E: IO to subprocess/file failed - write (0: Success)
  E: write, still have 4096 to write but couldn't
  E: IO to subprocess/file failed - write (0: Success)
  E: write, still have 4096 to write but couldn't
  E: IO to subprocess/file failed - write (0: Success)

  E: Sub-process Compress child returned an error code (100)

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