Since yesterday, all attempts to install jruby versions from 9.1.14 onwards (9.1.15… and so on) fail.
The error is
Unknown ruby string (do not know how to handle): jruby-9.1.14. Requested binary installation but no rubies are available to download, consider skipping --binary flag.
An example of such run is here https://travis-ci.org/kubamahnert/gooddata-ruby/jobs/476397742
This error looks very closely related to this jruby issue, where they stopped mirroring versions newer than 9.1.14 - https://github.com/jruby/jruby/issues/4789