[DRE-maint] Bug#815107: ruby-celluloid-fsm: FTBFS - Could not find 'timers' (~> 4.0.0) - did find: [timers-4.1.1]

[Michael Tautschnig]

Package: ruby-celluloid-fsm
Version: 0.20.0-2
Severity: serious
Usertags: goto-cc

During a rebuild of all Debian packages in a clean sid chroot (using cowbuilder
and pbuilder) the build failed with the following error.

[...]
┌──────────────────────────────────────────────────────────────────────────────┐
│ Checking Rubygems dependency resolution on ruby2.2                           │
└──────────────────────────────────────────────────────────────────────────────┘

GEM_PATH=/srv/jenkins-slave/workspace/sid-goto-cc-ruby-celluloid-fsm/.gem/ruby/2.2.0:/var/lib/gems/2.2.0:/usr/lib/x86_64-linux-gnu/rubygems-integration/2.2.0:/usr/share/rubygems-integration/2.2.0:/usr/share/rubygems-integration/2.2:/usr/share/rubygems-integration/all:debian/ruby-celluloid-fsm/usr/share/rubygems-integration/all ruby2.2 -e gem\ \"celluloid-fsm\"
/usr/lib/ruby/2.2.0/rubygems/dependency.rb:315:in `to_specs': Could not find 'timers' (~> 4.0.0) - did find: [timers-4.1.1] (Gem::LoadError)
Checked in 'GEM_PATH=/srv/jenkins-slave/workspace/sid-goto-cc-ruby-celluloid-fsm/.gem/ruby/2.2.0:/var/lib/gems/2.2.0:/usr/lib/x86_64-linux-gnu/rubygems-integration/2.2.0:/usr/share/rubygems-integration/2.2.0:/usr/share/rubygems-integration/2.2:/usr/share/rubygems-integration/all:debian/ruby-celluloid-fsm/usr/share/rubygems-integration/all', execute `gem env` for more information
	from /usr/lib/ruby/2.2.0/rubygems/specification.rb:1311:in `block in activate_dependencies'
	from /usr/lib/ruby/2.2.0/rubygems/specification.rb:1300:in `each'
	from /usr/lib/ruby/2.2.0/rubygems/specification.rb:1300:in `activate_dependencies'
	from /usr/lib/ruby/2.2.0/rubygems/specification.rb:1282:in `activate'
	from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_gem.rb:67:in `block in gem'
	from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_gem.rb:66:in `synchronize'
	from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_gem.rb:66:in `gem'
	from -e:1:in `<main>'
bigdecimal (1.2.6)
bundler (1.10.6)
dotenv (2.0.2)
hitimes (1.2.1)
io-console (0.4.3)
json (1.8.1)
minitest (5.8.4)
molinillo (0.2.3)
nenv (0.2.0)
net-http-persistent (2.9.4)
power_assert (0.2.6)
psych (2.0.8)
rake (10.4.2)
rdoc (4.2.0)
rspec-logsplit (0.1.3)
test-unit (3.1.7)
thor (0.19.1)
timers (4.1.1)
ERROR: Test "ruby2.2" failed. Exiting.
dh_auto_install: dh_ruby --install /srv/jenkins-slave/workspace/sid-goto-cc-ruby-celluloid-fsm/ruby-celluloid-fsm-0.20.0/debian/ruby-celluloid-fsm returned exit code 1
debian/rules:5: recipe for target 'binary' failed


The full build log is attached; please do let me know if the problem is
unreproducible, in which case I shall try to investigate further.

Best,
Michael
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