ruby/rubygems · error · Gem::MissingSpecError

Could not find '#{name}' (#{requirement}) among #{total} tot

Error message

Could not find '#{name}' (#{requirement}) among #{total} total gem(s)
Checked in 'GEM_PATH=#{Gem.path.join(File::PATH_SEPARATOR)}' #{@extra_message}, execute `gem env` for more information

What it means

Error "Could not find '#{name}' (#{requirement}) among #{total} total gem(s) Checked in 'GEM_PATH=#{Gem.path.join(File::PATH_SEPARATOR)}' #{@extra_message}, execute `gem env` for more information" thrown in ruby/rubygems.

Source

Thrown at lib/rubygems/dependency.rb:301

  end

  ##
  # True if the dependency will not always match the latest version.

  def specific?
    @requirement.specific?
  end

  def to_specs
    matches = matching_specs true

    # TODO: check Gem.activated_spec[self.name] in case matches falls outside

    if matches.empty?
      specs = Gem::Specification.stubs_for name

      if specs.empty?
        raise Gem::MissingSpecError.new name, requirement
      else
        raise Gem::MissingSpecVersionError.new name, requirement, specs
      end
    end

    # TODO: any other resolver validations should go here

    matches
  end

  def to_spec
    matches = to_specs.compact

    active = matches.find(&:activated?)
    return active if active

    unless prerelease?
      # Consider prereleases only as a fallback

View on GitHub (pinned to 86cbb817a3)

When it happens

Trigger: Thrown at lib/rubygems/dependency.rb:301 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/23eb46cc6552d542. Report an issue: GitHub.