ruby/rubygems · error · ArgumentError

you must supply exec_name

Error message

you must supply exec_name

What it means

Error "you must supply exec_name" thrown in ruby/rubygems.

Source

Thrown at lib/rubygems.rb:250

  def self.bin_path(name, exec_name = nil, *requirements)
    requirements = Gem::Requirement.default if
      requirements.empty?

    find_spec_for_exe(name, exec_name, requirements).bin_file exec_name
  end

  def self.find_and_activate_spec_for_exe(name, exec_name, requirements)
    spec = find_spec_for_exe name, exec_name, requirements
    Gem::LOADED_SPECS_MUTEX.synchronize do
      spec.activate
      finish_resolve
    end
    spec
  end
  private_class_method :find_and_activate_spec_for_exe

  def self.find_spec_for_exe(name, exec_name, requirements)
    raise ArgumentError, "you must supply exec_name" unless exec_name

    dep = Gem::Dependency.new name, requirements

    loaded = Gem.loaded_specs[name]

    return loaded if loaded && dep.matches_spec?(loaded)

    specs = dep.matching_specs(true)

    specs = specs.find_all do |spec|
      spec.executables.include? exec_name
    end if exec_name

    unless spec = specs.first
      msg = "can't find gem #{dep} with executable #{exec_name}"
      raise Gem::GemNotFoundException, msg
    end

View on GitHub (pinned to 86cbb817a3)

When it happens

Trigger: Thrown at lib/rubygems.rb:250 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/928e93f2c03ed6be. Report an issue: GitHub.