[DRE-maint] Bug#893821: ruby-shindo FTBFS with Ruby 2.5

[Adrian Bunk]

Source: ruby-shindo
Version: 0.3.8-1
Severity: serious
Tags: buster sid

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/ruby-shindo.html

...
┌──────────────────────────────────────────────────────────────────────────────┐
│ Run tests for ruby2.5 from debian/ruby-tests.rb                              │
└──────────────────────────────────────────────────────────────────────────────┘

RUBYLIB=/build/1st/ruby-shindo-0.3.8/debian/ruby-shindo/usr/lib/ruby/vendor_ruby:. GEM_PATH=debian/ruby-shindo/usr/share/rubygems-integration/all:/var/lib/gems/2.5.0:/usr/lib/x86_64-linux-gnu/rubygems-integration/2.5.0:/usr/share/rubygems-integration/2.5.0:/usr/share/rubygems-integration/all ruby2.5 debian/ruby-tests.rb
  
  Shindo build errors (build_error)
    another + returns true
  
  tag
    negative -negative
/usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require': cannot load such file -- ubygems (LoadError)
	from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
      - includes "+ is tested"
        expected "" to include "+ is tested"
      - includes "skipped (negative)"
        expected "" to include "skipped (negative)"
      $?.exitstatus - returns 0
        expected => 0
        returned => 1
    positive +positive
/usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require': cannot load such file -- ubygems (LoadError)
	from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
      - includes "+ is tested"
        expected "" to include "+ is tested"
      - includes "skipped"
        expected "" to include "skipped"
      $?.exitstatus - returns 0
        expected => 0
        returned => 1
  
  basics
    + returns false
    + raises StandardError
    + returns true
  
  bin
    exception
/usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require': cannot load such file -- ubygems (LoadError)
	from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
      - includes "- exception"
        expected "" to include "- exception"
      $?.exitstatus + returns 1
    failure
/usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require': cannot load such file -- ubygems (LoadError)
	from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
      - includes "- failure"
        expected "" to include "- failure"
      $?.exitstatus + returns 1
    pending
/usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require': cannot load such file -- ubygems (LoadError)
	from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
      - includes "# test implicit pending"
        expected "" to include "# test implicit pending"
      - includes "# test explicit pending"
        expected "" to include "# test explicit pending"
      - includes "# tests explicit pending"
        expected "" to include "# tests explicit pending"
      $?.exitstatus - returns 0
        expected => 0
        returned => 1
    success
/usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require': cannot load such file -- ubygems (LoadError)
	from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
      - includes "+ success"
        expected "" to include "+ success"
      - includes "inline tests"
        expected "" to include "inline tests"
      - includes "+ returns false"
        expected "" to include "+ returns false"
      $?.exitstatus - returns 0
        expected => 0
        returned => 1
  
  16 failed, 6 succeeded in 20.775533539 seconds
  
ERROR: Test "ruby2.5" failed. Exiting.
dh_auto_install: dh_ruby --install /build/1st/ruby-shindo-0.3.8/debian/ruby-shindo returned exit code 1
make: *** [debian/rules:17: binary] Error 1