Bug 50197

Не работает gem-rubocop

Версия программы:
=================
gem-rubocop-1.36.0-alt1

Шаги, приводящие к ошибке:
==========================
# apt-get install gem-rubocop
$ rubocop --help

Результат:
==========
*************************************************************************
*** You must run `rake generate` to generate the lexer and the parser ***
*************************************************************************
/usr/lib/ruby/gems/2.7.0/gems/rubocop-ast-1.17.0/lib/rubocop/ast/node_pattern/lexer.rb:4:in `require_relative': cannot load such file -- /usr/lib/ruby/gems/2.7.0/gems/rubocop-ast-1.17.0/lib/rubocop/ast/node_pattern/lexer.rex (LoadError)
        from /usr/lib/ruby/gems/2.7.0/gems/rubocop-ast-1.17.0/lib/rubocop/ast/node_pattern/lexer.rb:4:in `<top (required)>'
        from /usr/lib/ruby/gems/2.7.0/gems/rubocop-ast-1.17.0/lib/rubocop/ast.rb:20:in `require_relative'
        from /usr/lib/ruby/gems/2.7.0/gems/rubocop-ast-1.17.0/lib/rubocop/ast.rb:20:in `<top (required)>'
        from /usr/lib/ruby/gems/2.7.0/gems/rubocop-ast-1.17.0/lib/rubocop-ast.rb:3:in `require_relative'
        from /usr/lib/ruby/gems/2.7.0/gems/rubocop-ast-1.17.0/lib/rubocop-ast.rb:3:in `<top (required)>'
        from <internal:/usr/lib/ruby/rubygems/core_ext/kernel_require.rb>:160:in `require'
        from <internal:/usr/lib/ruby/rubygems/core_ext/kernel_require.rb>:160:in `rescue in require'
        from <internal:/usr/lib/ruby/rubygems/core_ext/kernel_require.rb>:149:in `require'
        from /usr/lib/ruby/gemie/gems/rubocop-1.36.0/lib/rubocop.rb:14:in `<top (required)>'
        from <internal:/usr/lib/ruby/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from <internal:/usr/lib/ruby/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from /usr/bin/rubocop:14:in `<main>'
<internal:/usr/lib/ruby/rubygems/core_ext/kernel_require.rb>:85:in `require': cannot load such file -- rubocop-ast (LoadError)
        from <internal:/usr/lib/ruby/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from /usr/lib/ruby/gemie/gems/rubocop-1.36.0/lib/rubocop.rb:14:in `<top (required)>'
        from <internal:/usr/lib/ruby/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from <internal:/usr/lib/ruby/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from /usr/bin/rubocop:14:in `<main>'

Ожидаемый результат:
====================
Выводится help меню

Дополнительно:
==============
# rpm -q gem-rubocop-ast 
gem-rubocop-ast-1.17.0-alt1.noarch