missing dependency on libyaml-0-2

[James Orr]

After sudo apt-get install haskell-stack on a fresh install of 15.10, and running stack upgrade, I received the complaint:

stack: error while loading shared libraries: libyaml-0.so.2: cannot open shared object file: No such file or directory
After sudo apt-get install libyaml-0-2, I was able to run stack upgrade successfully.

Possibly a missing dependency in the deb?

FeatureFreezeException:
This issue should be fixed in haskell-stack 0.1.2.0-2, which is the latest version available in Debian unstable. Could this be synced to Ubuntu Wily?

Changelog

haskell-stack (0.1.2.0-2) unstable; urgency=medium

  * Add ${shlibs:Depends} substvar, to pull in dependency on libyaml.
  * Add dependencies on make and libgmp-dev, so that stack setup works.
    Thanks to Tom Fitzhenry for reporting these two issues. Closes: 797446

 -- Joachim Breitner <email address hidden> Tue, 01 Sep 2015 18:43:05 -0700

[Hans Joachim Desserud (hjd)]

Thanks for taking your time to report this issue and help making Ubuntu better.

I was able to reproduce this issue by following the steps to reproduce with haskell-stack 0.1.2.0-1 on Ubuntu Wily. After installing libyaml-0-2 the error message went away.

I did some research and found a similar bug report in Debian, see the task under Affects. In fact, this issue should be fixed in 0.1.2.0-2 and libyaml-0-2 is now listed as a dependency (https://packages.debian.org/sid/haskell-stack).

Since haskell-stack 0.1.2.0-2 seems to be a bugfix-only release, we can try to get a FreezeException and sync the latest version from Debian (https://wiki.ubuntu.com/FreezeExceptionProcess#FeatureFreeze_for_bugfix-only_updates).

Two notes to whoever reviewing this:
* I only get an error message when attempting to browse the DARCS repo for this package from https://tracker.debian.org/pkg/haskell-stack, but http://bazaar.launchpad.net/~ubuntu-branches/debian/sid/haskell-stack/sid/revision/3 should be the corresponding change.
* I know there has been/is some ongoing haskell transition, but I don't know how this package fits into that or whether it might not be a concern.

[Colin Watson (cjwatson)]

This doesn't need an FFE. I'll sync it, thanks.

[Colin Watson (cjwatson)]

Synced, thanks.