Environment Information

I'm getting new warnings since JRuby 9.4.0.0 in Rake's extension code to FileUtils: https://github.com/ruby/rake/blob/1d387b0291a95d433e83963c0278c656841263c3/lib/rake/file_utils_ext.rb.

Expected Behavior

Clone ttps://github.com/rubygems/rubygems/.

Run ruby -Ilib -S rake install with JRuby 9.4.0.0. NOTE: this upgrades your JRuby installation to the the master version of RubyGems & Bundler. It can be reverted with gem update --system <previous_version>.

You'll get an output full of lines similar to the following:

/Users/deivid/.asdf/installs/ruby/jruby-9.4.0.0/lib/ruby/gems/shared/gems/rake-13.0.6/lib/rake/file_utils_ext.rb:36: warning: key :verbose is duplicated and overwritten on line 36

Actual Behavior

Clean output.