[Bug 1616909] Re: Installing multiple dbgsym packages fails

[David Kalnischkies]

APT is using dpkg's --recursive option with a temporary directory since
recently if it has to touch >5 packages to avoid producing too long
commandlines for the kernel (yes, that is a thing… although unlikely it
does happen in big upgrades). Seems like this interface in dpkg does
support only *.deb files. Debian had decided to stick with .deb for
their automatic debug packages to avoid changing all tools dealing with
deb files to also deal with ddeb (or whatever).

Anyway, as that used to work with apt and is a valid althrough uncommon
thing to have packages without .deb as extension I have just commited a
patch upstream:
https://anonscm.debian.org/cgit/apt/apt.git/commit/?id=4f242a2

As a workaround you can set the option "dpkg::install::recursive" to
false and "dpkg::install::recursive::force" to true OR set
"dpkg::install::recursive::minimum" to e.g. 100 (assuming you can accept
not installing a 100 ddebs at once for the time being). Both workarounds
effect all dpkg calls through, so please only use if needed until the
patch reaches Ubuntu – don't set it "forever" or you will eventually run
into the problems this is designed to void in the first place…

** Changed in: apt (Ubuntu)
       Status: New => Fix Committed

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https://bugs.launchpad.net/bugs/1616909

Title:
  Installing multiple dbgsym packages fails

Status in apt package in Ubuntu:
  Fix Committed

Bug description:
  On Yakkety, installing a single -dbgsym package using apt works fine.
  However, if I specify multiple on a command line, I get this:

  $ sudo apt install metacity-dbgsym gnome-flashback-dbgsym
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  The following NEW packages will be installed:
    gnome-flashback-dbgsym metacity-dbgsym
  0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
  Need to get 0 B/1168 kB of archives.
  After this operation, 4972 kB of additional disk space will be used.
  dpkg: error: searched, but found no packages (files matching *.deb)
  E: Sub-process /usr/bin/dpkg returned an error code (2)

  The *.deb wildcard is wrong because the packages actually have a .ddeb
  extension, i.e. /var/cache/apt/archives/gnome-flashback-
  dbgsym_3.20.2-1ubuntu1_amd64.ddeb.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: apt 1.3~rc2ubuntu2
  ProcVersionSignature: Ubuntu 4.4.0-9134.53-generic 4.4.15
  Uname: Linux 4.4.0-9134-generic x86_64
  ApportVersion: 2.20.3-0ubuntu7
  Architecture: amd64
  CurrentDesktop: GNOME-Flashback:Unity
  Date: Thu Aug 25 15:44:22 2016
  InstallationDate: Installed on 2014-08-23 (732 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140823)
  SourcePackage: apt
  UpgradeStatus: Upgraded to yakkety on 2016-04-28 (119 days ago)

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