puppetlabs/puppet · error · SerializationError

Invalid input. %{ext_no} is not a valid extension number

Error message

Invalid input. %{ext_no} is not a valid extension number

What it means

Error "Invalid input. %{ext_no} is not a valid extension number" thrown in puppetlabs/puppet.

Source

Thrown at lib/puppet/pops/serialization/json.rb:275

    def read
      obj = nil
      loop do
        raise SerializationError, _('Unexpected end of input') if @etor_stack.empty?

        etor = @etor_stack.last
        begin
          obj = etor.next
          break
        rescue StopIteration
          @etor_stack.pop
        end
      end
      if obj.is_a?(Array)
        ext_etor = obj.each
        @etor_stack << ext_etor
        ext_no = ext_etor.next
        ext_block = @type_registry[ext_no]
        raise SerializationError, _("Invalid input. %{ext_no} is not a valid extension number") % { ext_no: ext_no } if ext_block.nil?

        obj = ext_block.call(nil)
      end
      obj
    end

    def register_type(extension_number, &block)
      @type_registry[extension_number] = block
    end

    private

    def parse_io(io)
      case io
      when IO, StringIO
        ::Puppet::Util::Json.load(io.read)
      when String
        ::Puppet::Util::Json.load(io)

View on GitHub (pinned to e227c27540)

When it happens

Trigger: Thrown at lib/puppet/pops/serialization/json.rb:275 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of puppetlabs/puppet@e227c27540 (2026-08-21). Data as JSON: /api/errors/f5463290c4ba8a97. Report an issue: GitHub.