RDoc parser error in 0.56.0 for alpine.rb (Ruby 2.6.7)

[maunzCache]

Happens to me when i run gem kitchen-ansible --force with Ruby ruby 2.6.7p197 (2021-04-05 revision 67941) [x86_64-linux]

Before reporting this, could you check that the file you're documenting
has proper syntax:

  /home/USER/.rvm/rubies/ruby-2.6.7/bin/ruby -c lib/kitchen/provisioner/ansible/os/alpine.rb

RDoc is not a full Ruby parser and will fail when fed invalid ruby programs.

The internal error was:

	(NoMethodError) undefined method `[]' for nil:NilClass

ERROR:  While executing gem ... (NoMethodError)
    undefined method `[]' for nil:NilClass