[DRE-maint] Bug#919060: gitlab: Could not find gem 'unicorn (~> 5.1)'

[Dmitry Smirnov]

Package: gitlab
Version: 11.5.6+dfsg-1
Severity: serious

Installing "gitlab" on "testing" (with enabled "unstable") fails as follows:

~~~~
Setting up gitlab (11.5.6+dfsg-1) ...
Could not find gem 'unicorn (~> 5.1)' in any of the gem sources listed in 
your Gemfile.
dpkg: error processing package gitlab (--configure):
 installed gitlab package post-installation script subprocess returned error 
exit status 1
~~~~

unicorn (5.4.1-1) is already installed.

Version 11.6.0+dfsg-1 from "experimental" fails to install just the same...

This appears to be yet another pathological case of broken/unsatisfiable 
dependency...
How did it happen? Why uninstallable GitLab got uploaded yet again?

Gitlab is only available from "unstable" and that's where it is broken most 
of the time... :(

-- 
Cheers,
 Dmitry Smirnov

---

Good luck happens when preparedness meets opportunity.
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