ruby/rubygems · error · Gem::InvalidSpecificationException

The gemspec at #{spec.loaded_from} is not valid. Please fix

Error message

The gemspec at #{spec.loaded_from} is not valid. Please fix this gemspec.
The validation error was '#{e.message}'

What it means

Error "The gemspec at #{spec.loaded_from} is not valid. Please fix this gemspec. The validation error was '#{e.message}' " thrown in ruby/rubygems.

Source

Thrown at lib/bundler/rubygems_integration.rb:55

    def loaded_specs(name)
      Gem.loaded_specs[name]
    end

    def mark_loaded(spec)
      if spec.respond_to?(:activated=)
        current = Gem.loaded_specs[spec.name]
        current.activated = false if current
        spec.activated = true
      end
      Gem.loaded_specs[spec.name] = spec
    end

    def validate(spec)
      Bundler.ui.silence { spec.validate_for_resolution }
    rescue Gem::InvalidSpecificationException => e
      error_message = "The gemspec at #{spec.loaded_from} is not valid. Please fix this gemspec.\n" \
        "The validation error was '#{e.message}'\n"
      raise Gem::InvalidSpecificationException.new(error_message)
    rescue Errno::ENOENT
      nil
    end

    def stub_set_spec(stub, spec)
      stub.instance_variable_set(:@spec, spec)
    end

    def path(obj)
      obj.to_s
    end

    def ruby_engine
      Gem.ruby_engine
    end

    def read_binary(path)
      Gem.read_binary(path)

View on GitHub (pinned to 86cbb817a3)

When it happens

Trigger: Thrown at lib/bundler/rubygems_integration.rb:55 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/8b7485d85638b75d. Report an issue: GitHub.