puppetlabs/puppet · error · SerializationError

Unexpected end of input

Error message

Unexpected end of input

What it means

Error "Unexpected end of input" thrown in puppetlabs/puppet.

Source

Thrown at lib/puppet/pops/serialization/json.rb:260

  class Unpacker
    def initialize(io)
      re_initialize(io)
      @type_registry = {}
      @nested = []
    end

    def re_initialize(io)
      parsed = parse_io(io)
      raise SerializationError, _("JSON stream is not an array. It is a %{klass}") % { klass: io.class.name } unless parsed.is_a?(Array)

      @etor_stack = [parsed.each]
    end

    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

View on GitHub (pinned to e227c27540)

When it happens

Trigger: Thrown at lib/puppet/pops/serialization/json.rb:260 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

• Parsing and encoding errors: unexpected token, malformed input — why parsers reject input and how to find the real culprit.

AI-assisted analysis of puppetlabs/puppet@e227c27540 (2026-08-21). Data as JSON: /api/errors/01e06662118594c8. Report an issue: GitHub.