[DRE-maint] Bug#1123650: Acknowledgement (schleuder installation fails)

[Andrew Gallagher]

More ruby dependency hell, now preventing schleuder-api-daemon from 
starting up:

Dec 21 10:37:27 fum systemd[1]: Started schleuder-api-daemon.service - 
Schleuder API daemon.
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]: 
/usr/lib/ruby/vendor_ruby/rubygems/specification.rb:2248:in 
`raise_if_conflicts': Unable to activate thin-1.8.2, because rack-3.1.18 
conflicts with rack (>= 1, < 3) (Gem::ConflictError)
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
/usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1379:in `activate'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
/usr/lib/ruby/vendor_ruby/rubygems.rb:211:in `rescue in try_activate'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
/usr/lib/ruby/vendor_ruby/rubygems.rb:204:in `try_activate'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:153:in 
`rescue in require'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:149:in 
`require'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
/usr/lib/ruby/vendor_ruby/schleuder-api-daemon.rb:10:in `<top (required)>'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in 
`require'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in 
`require'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
/usr/bin/schleuder-api-daemon:4:in `<main>'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]: 
/usr/lib/ruby/vendor_ruby/rubygems/specification.rb:2248:in 
`raise_if_conflicts': Unable to activate thin-1.8.2, because rack-3.1.18 
conflicts with rack (>= 1, < 3) (Gem::ConflictError)
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
/usr/lib/ruby/vendor_ruby/rubygems/specification.rb:1379:in `activate'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
/usr/lib/ruby/vendor_ruby/rubygems.rb:205:in `try_activate'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:153:in 
`rescue in require'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:149:in 
`require'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
/usr/lib/ruby/vendor_ruby/schleuder-api-daemon.rb:10:in `<top (required)>'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in 
`require'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in 
`require'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
/usr/bin/schleuder-api-daemon:4:in `<main>'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]: 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in 
`require': cannot load such file -- thin (LoadError)
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in 
`require'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
/usr/lib/ruby/vendor_ruby/schleuder-api-daemon.rb:10:in `<top (required)>'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in 
`require'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in 
`require'
Dec 21 10:37:28 fum schleuder-api-daemon[2958612]:         from 
/usr/bin/schleuder-api-daemon:4:in `<main>'
Dec 21 10:37:28 fum systemd[1]: schleuder-api-daemon.service: Main 
process exited, code=exited, status=1/FAILURE
Dec 21 10:37:28 fum systemd[1]: schleuder-api-daemon.service: Failed 
with result 'exit-code'.