# File lib/bundler/fetcher/dependency.rb, line 24
      def specs(gem_names, full_dependency_list = [], last_spec_list = [])
        query_list = gem_names.uniq - full_dependency_list

        log_specs "Query List: #{query_list.inspect}"

        return last_spec_list if query_list.empty?

        spec_list, deps_list = Bundler::Retry.new("dependency api", FAIL_ERRORS).attempts do
          dependency_specs(query_list)
        end

        returned_gems = spec_list.map(&:first).uniq
        specs(deps_list, full_dependency_list + returned_gems, spec_list + last_spec_list)
      rescue MarshalError
        Bundler.ui.info "" unless Bundler.ui.debug? # new line now that the dots are over
        Bundler.ui.debug "could not fetch from the dependency API, trying the full index"
        nil
      rescue HTTPError, GemspecError
        Bundler.ui.info "" unless Bundler.ui.debug? # new line now that the dots are over
        Bundler.ui.debug "could not fetch from the dependency API\nit's suggested to retry using the full index via `bundle install --full-index`"
        nil
      end