Error Running Ruby Debug IDE with Rails 4 app

Question

I am having a problem running a Rails 4 app with Ruby Debug IDE using Visual Studio Code. This is the error I get.

/home/ziyan/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/specification.rb:2158:in `method_missing'
: undefined method `this' for #<Gem::Specification:0x1271b08 debase-0.2.1> (NoMethodError)
    from /home/ziyan/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/specification.rb:1057:in `find_active_stub_by_path'
    from /home/ziyan/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:64:in `require'
    from /home/ziyan/.rvm/gems/ruby-2.3.0@tbv_website/gems/debase-0.2.1/lib/debase.rb:4:in `<top (required)>'
    from /home/ziyan/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:in `require'
    from /home/ziyan/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:in `rescue in require'
    from /home/ziyan/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:40:in `require'
    from /home/ziyan/.rvm/gems/ruby-2.3.0@tbv_website/gems/ruby-debug-ide-0.6.0/lib/ruby-debug-ide.rb:8:in `<top (required)>'
    from /home/ziyan/.rvm/gems/ruby-2.3.0@tbv_website/gems/ruby-debug-ide-0.6.0/bin/rdebug-ide:8:in `require_relative'
    from /home/ziyan/.rvm/gems/ruby-2.3.0@tbv_website/gems/ruby-debug-ide-0.6.0/bin/rdebug-ide:8:in `<top (required)>'
    from /home/ziyan/.rvm/gems/ruby-2.3.0@tbv_website/bin/rdebug-ide:23:in `load'
    from /home/ziyan/.rvm/gems/ruby-2.3.0@tbv_website/bin/rdebug-ide:23:in `<main>'
    from /home/ziyan/.rvm/gems/ruby-2.3.0@tbv_website/bin/ruby_executable_hooks:15:in `eval'
    from /home/ziyan/.rvm/gems/ruby-2.3.0@tbv_website/bin/ruby_executable_hooks:15:in `<main>'

Extra details

• Ruby 2.3.0
• Ruby Debug IDE 0.6
• IDE: Visual Studio Code + vscode-ruby

Different variations tried

• Tried updating to Ruby 2.3.3
• Tried downgrading ruby-debug-ide to 0.5
• Tried upgrading ruby-debug-ide to 0.6.1.beta4

With no success

Extra

I started a new Rails 5 + Ruby 2.4.0 project and debugging works fine with it. It uses the same ruby-debug-ide version. So the version of ruby-debug-ide should be working.

Answer 1

I just solved the issue by updating rubygems to version 2.6.11 (I think it's the latest version available as of today).

$ gem update --system

Now debugging in VSCode works again.

My current config.

• CentOS 7
• RVM, latest stable
• VSCode, latest stable with Ruby extension 0.10.4
• Rails 4 - Ruby 2.3.3 (currently working on a Solidus-based e-commerce)
• Debase 0.2.1, Ruby-Debug-IDE 0.6.1b4

I hope this will help you.