rouge-ruby/rouge · error · RuntimeError

no such state #{name.inspect}

Error message

no such state #{name.inspect}

What it means

Error "no such state #{name.inspect}" thrown in rouge-ruby/rouge.

Source

Thrown at lib/rouge/regex_lexer.rb:373

    # Specify an action to be run every fresh lex.
    #
    # @example
    #   start { puts "I'm lexing a new string!" }
    def self.start(&b)
      start_procs << b
    end

    # Define a new state for this lexer with the given name.
    # The block will be evaluated in the context of a {StateDSL}.
    def self.state(name, &b)
      name = name.to_sym
      state_definitions[name] = StateDSL.new(self, name, &b)
    end

    def self.prepend(name, &b)
      name = name.to_sym
      dsl = state_definitions[name] or raise "no such state #{name.inspect}"
      replace_state(name, dsl.prepended(&b))
    end

    def self.append(name, &b)
      name = name.to_sym
      dsl = state_definitions[name] or raise "no such state #{name.inspect}"
      replace_state(name, dsl.appended(&b))
    end

    # @private
    def self.get_state(name)
      return name if name.is_a? State

      states[name.to_sym] ||= begin
        defn = state_definitions[name.to_sym] or raise "unknown state: #{name.inspect}"
        defn.to_state(self)
      end
    end

View on GitHub (pinned to bd7dad7b09)

When it happens

Trigger: Thrown at lib/rouge/regex_lexer.rb:373 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of rouge-ruby/rouge@bd7dad7b09 (2026-08-23). Data as JSON: /api/errors/9f82b0ecabf9631c. Report an issue: GitHub.