Ubuntu
ghc6 package

hardy -> intrepid upgrade issues

Bug #277233 reported by Michael Vogt
34
Affects Status Importance Assigned to Milestone
ghc6 (Ubuntu)
Won't Fix
High
Unassigned
Ubuntu ubuntu-8.10
Intrepid
Won't Fix
High
Unassigned
Ubuntu ubuntu-8.10
gtk2hs (Debian)
Fix Released
Unknown
gtk2hs (Ubuntu)
Fix Released
High
StefanPotyra
Intrepid
Fix Released
High
StefanPotyra

Bug Description

Binary package hint: ghc6

On a hardy to intrepid upgrade with the (randomly picked) "libghc6-gtk-dev" the upgrade fails. To reproduce:

1. get a clean hardy chroot (e.g. pbuilder)
2. apt-get install libghc6-gtk-dev update-manager-core
3. sudo do-release-upgrade -d
4. say "y" and wait for:

...
Preparing to replace libghc6-gtk-dev 0.9.12.1-1ubuntu2 (using .../libghc6-gtk-dev_0.9.13-2ubuntu1_i386.deb) ...
/var/lib/dpkg/info/libghc6-gtk-dev.prerm: 10: ghc-pkg: not found
dpkg: warning - old pre-removal script returned error exit status 127
dpkg - trying script from the new package instead ...
/var/lib/dpkg/tmp.ci/prerm: 10: ghc-pkg: not found
dpkg: error processing /var/cache/apt/archives/libghc6-gtk-dev_0.9.13-2ubuntu1_i386.deb (--unpack):
 subprocess new pre-removal script returned error exit status 127
...

The reason for this seems to be that is managed via alternatives and when the postinst of libghc6-gtk-dev is run (new) ghc6 is unpacked but not configured yet and /usr/bin/ghc-pkg is not available. That makes the script fail and dpkg
gets really unhappy:

root@top:/# dpkg --configure -a
dpkg: error processing libghc6-glib-dev (--configure):
 Package is in a very bad inconsistent state - you should
 reinstall it before attempting configuration.

Related branches

lp:ubuntu/karmic/gtk2hs
Michael Vogt (mvo)
Changed in ghc6:
importance: Undecided → High
milestone: none → ubuntu-8.10
status: New → Triaged
Revision history for this message
Iain Lane (laney) wrote :

So I guess this is likely to be a problem with all Haskell libraries, when they are upgraded in the same run as ghc6?

Would making ghc6 a Pre-Depends of these libraries be appropriate? I have pinged kaol, the Debian maintainer of ghc for an opinion.

Revision history for this message
StefanPotyra (sistpoty) wrote :

Hi,

I believe this is a bug in gtk2hs: Unlike the other haskell libraries, which generate the maintainer scripts either via haskell-utils or haskell-devscripts, gtk2hs ships a it's own variant, which calls ghc-pkg (as managed via alternatives). In contrast, haskell-utils calls /usr/bin/ghc-pkg6, haskell-devscripts /usr/lib/ghc-6.8.2/bin/ghc-pkg, which are not managed via alternatives.

I'll upload a fixed gtk2hs soon, and will also file a bug in BTS about it.

Cheers,
   Stefan.

Changed in gtk2hs:
assignee: nobody → sistpoty
importance: Undecided → High
status: New → In Progress
Revision history for this message
StefanPotyra (sistpoty) wrote :

ghc6 -> won't fix: haskell libraries shall not use alternative managed files in maintainer scripts. (or would invalid be more appropriate *shrug*?)

Changed in ghc6:
status: Triaged → Won't Fix
status: Triaged → Won't Fix
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package gtk2hs - 0.9.13-2ubuntu2

---------------
gtk2hs (0.9.13-2ubuntu2) intrepid; urgency=low

  * debian/postinst.in, debian/prerm.in:
    Call /usr/bin/ghc-pkg6 instead of ghc-pkg, because the latter is
    managed in ghc6 via alternatives, and hence might not be available
    when gtk2hs's binary packges get configured. LP: #229489, #277233.
    Forwarded to Debian BTS via bug #501052.

 -- Stefan Potyra <email address hidden> Fri, 03 Oct 2008 18:34:53 +0200

Changed in gtk2hs:
status: In Progress → Fix Released
Revision history for this message
Ravindran K (ravindran-k) wrote :

Hi.. Some error while upgrading python-daap from hardy to Intrepid.. temporarily removed the package for progress further..

Revision history for this message
StefanPotyra (sistpoty) wrote :

@Ravindran: did you get an error with python-daap?

If so, can you file a separate one at https://launchpad.net/ubuntu/+source/python-daap/+bugs as this is unrelated to ghc6 and gtk2hs?

Thanks,
    Stefan.

Bug Watch Updater (bug-watch-updater)
Changed in gtk2hs:
status: Unknown → New
Bug Watch Updater (bug-watch-updater)
Changed in gtk2hs:
status: New → Fix Released
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