Unable to install ruby-debug-ide in qa directory

bundle install in the qa directory is failing for me:

Installing base gem
Unable to resolve dependency: user requested 'debase (> 0)'
/Users/stanhu/.rbenv/versions/2.6.5/lib/ruby/2.6.0/rubygems/resolver/installer_set.rb:72:in `add_always_install'
  /Users/stanhu/.rbenv/versions/2.6.5/lib/ruby/2.6.0/rubygems/dependency_installer.rb:478:in `resolve_dependencies'
  /Users/stanhu/.rbenv/versions/2.6.5/lib/ruby/2.6.0/rubygems/dependency_installer.rb:385:in `install'
  mkrf_conf.rb:36:in `rescue in <main>'
  mkrf_conf.rb:29:in `<main>'

rake failed, exit code 1

Gem files will remain installed in /Users/stanhu/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/ruby-debug-ide-0.7.0 for inspection.
Results logged to /Users/stanhu/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/extensions/x86_64-darwin-19/2.6.0/ruby-debug-ide-0.7.0/gem_make.out

An error occurred while installing ruby-debug-ide (0.7.0), and Bundler cannot continue.
Make sure that `gem install ruby-debug-ide -v '0.7.0' --source 'https://rubygems.org/'` succeeds before bundling.

$ gem list | grep debase
debase (0.2.4.1)

https://github.com/ruby-debug/ruby-debug-ide/issues/106

$ cat /Users/stanhu/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/extensions/x86_64-darwin-19/2.6.0/ruby-debug-ide-0.7.0/gem_make.out
current directory: /Users/stanhu/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/ruby-debug-ide-0.7.0/ext
/Users/stanhu/.rbenv/versions/2.6.5/bin/ruby mkrf_conf.rb
Installing base gem
Unable to resolve dependency: user requested 'debase (> 0)'
/Users/stanhu/.rbenv/versions/2.6.5/lib/ruby/2.6.0/rubygems/resolver/installer_set.rb:72:in `add_always_install'
  /Users/stanhu/.rbenv/versions/2.6.5/lib/ruby/2.6.0/rubygems/dependency_installer.rb:478:in `resolve_dependencies'
  /Users/stanhu/.rbenv/versions/2.6.5/lib/ruby/2.6.0/rubygems/dependency_installer.rb:385:in `install'
  mkrf_conf.rb:36:in `rescue in <main>'
  mkrf_conf.rb:29:in `<main>'

rake failed, exit code 1

I've tried to reinstall debase to no avail.

I'm wondering whether we really need this gem.