[Reproducible-builds] Bug#789837: FTBFS: all tests error with LoadError: cannot load such file -- rubyeventmachine

[Chris West (Faux)]

Package: ruby-vegas
Version: 0.1.11-2
Severity: serious
Tags: sid stretch
Justification: fails to build from source (but built successfully in the past)
User: reproducible-builds at lists.alioth.debian.org

Dear Maintainer,

The package fails to build: all tests give this LoadError:

26 specifications (26 requirements), 0 failures, 0 errors
/usr/bin/ruby2.2 /usr/bin/gem2deb-test-runner
Running tests for ruby2.2 using debian/ruby-tests.rb...
RUBYLIB=/ruby-vegas-0.1.11/debian/ruby-vegas/usr/lib/ruby/vendor_ruby:. ruby2.2 debian/ruby-tests.rb
Vegas::Runner
  creating an instance
    basic usage
      - sets app [ERROR: LoadError]
[...]
LoadError: cannot load such file -- rubyeventmachine
        /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require': basic usage - sets app
        /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        /usr/lib/ruby/vendor_ruby/eventmachine.rb:8:in `<top (required)>'
        /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        /usr/lib/ruby/vendor_ruby/thin.rb:7:in `<top (required)>'
        /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        /usr/lib/ruby/vendor_ruby/rack/handler/thin.rb:1:in `<top (required)>'
        /ruby-vegas-0.1.11/test/test_helper.rb:24:in `vegas'
        /ruby-vegas-0.1.11/test/test_vegas_runner.rb:20:in `block (4 levels) in <top (required)>'
        /ruby-vegas-0.1.11/test/test_vegas_runner.rb:23:in `block (3 levels) in <top (required)>'
        /ruby-vegas-0.1.11/test/test_vegas_runner.rb:17:in `block (2 levels) in <top (required)>'
        /ruby-vegas-0.1.11/test/test_vegas_runner.rb:15:in `block in <top (required)>'
        /ruby-vegas-0.1.11/test/test_vegas_runner.rb:8:in `<top (required)>'
        /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        debian/ruby-tests.rb:2:in `<main>'
[..]
26 specifications (0 requirements), 0 failures, 26 errors

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 3.19.0-21-generic (SMP w/8 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)