ruby/rubygems · error · Gem::LoadError

#{path} found in multiple gems: #{names.join ", "}

Error message

#{path} found in multiple gems: #{names.join ", "}

What it means

Error "#{path} found in multiple gems: #{names.join ", "}" thrown in ruby/rubygems.

Source

Thrown at lib/rubygems/core_ext/kernel_require.rb:121

      # If a and b are currently active with c being unresolved and d.rb is
      # requested, then find_in_unresolved_tree will find d.rb in d because
      # it's a dependency of c.
      #
      if found_specs.empty?
        found_specs = Gem::Specification.find_in_unresolved_tree path

        found_specs.each(&:activate)

      # We found +path+ directly in an unresolved gem. Now we figure out, of
      # the possible found specs, which one we should activate.
      else

        # Check that all the found specs are just different
        # versions of the same gem
        names = found_specs.map(&:name).uniq

        if names.size > 1
          raise Gem::LoadError, "#{path} found in multiple gems: #{names.join ", "}"
        end

        # Ok, now find a gem that has no conflicts, starting
        # at the highest version.
        valid = found_specs.find {|s| !s.has_conflicts? }

        unless valid
          le = Gem::LoadError.new "unable to find a version of '#{names.first}' to activate"
          le.name = names.first
          raise le
        end

        valid.activate
      end
    end

    begin
      gem_original_require(path)

View on GitHub (pinned to 86cbb817a3)

When it happens

Trigger: Thrown at lib/rubygems/core_ext/kernel_require.rb:121 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of ruby/rubygems@86cbb817a3 (2026-08-23). Data as JSON: /api/errors/66837c7115b8eec6. Report an issue: GitHub.