Is this a YAML bug?

ruby-talk
1

The code:

require "http-access2"
require "yaml"

client = HTTPClient.new

File.open("client.yml", "w") do |file|
  file.puts client.to_yaml
end

client2 = YAML.load( File.read( "client.yml" ))

p client2

The error:

/usr/local/lib/ruby/1.8/yaml.rb:133:in `transfer': allocator undefined
for Method (TypeError)
        from /usr/local/lib/ruby/1.8/yaml.rb:133:in `load'
        from client.rb:11

2

Jim wrote:

The code:

require "http-access2"
require "yaml"

client = HTTPClient.new

File.open("client.yml", "w") do |file|
  file.puts client.to_yaml
end

client2 = YAML.load( File.read( "client.yml" ))

p client2

The error:

/usr/local/lib/ruby/1.8/yaml.rb:133:in `transfer': allocator undefined
for Method (TypeError)
        from /usr/local/lib/ruby/1.8/yaml.rb:133:in `load'
        from client.rb:11

Works fine for me on Ruby 1.8.4

I heard of a yaml bug in Ruby 1.8.3 - I'm assuming that's it.

···

--
Entry in RollerCoaster Tycoon 2 readme.txt file:
RollerCoaster Tycoon2 must be played on a video card capable of 640x480 screen resolution at a bit depth setting of 256 bits.
And the proof that playing too many strategy games causes loss of humour:
http://tinyurl.com/dyrtt

3

$ ruby -v
ruby 1.8.4 (2005-12-24) [i686-linux]

4

I don't think it's a bug, just that HTTPClient has a Method in one of it's instance variables, and YAML doesn't have a way to load them (rightly so, of course). Try this:

  require "http-access2"
  require "yaml"

  class HTTPClient
    def to_yaml( opts = {} )
      YAML.quick_emit( self.id, opts ) { |out|
        out.map( "!contrived.cxm,2006-01-05" ) { |map|
          instance_variables.sort.each { |iv|
            value = instance_eval(iv)
            map.add(iv[1..-1], value) unless value.is_a? Method
          }
        }
      }
    end
  end

  YAML.add_domain_type( "contrived.cxm,2006-01-05", "httpClient" ) { |type, val>
    YAML.object_maker( HTTPClient, val )
  }

  client = HTTPClient.new

  File.open("client.yml", "w") do |file|
    file.puts client.to_yaml
  end

  client2 = YAML.load( File.read( "client.yml" ))

  p client2

I should say, however, that you really shouldn't use this - the client is undoubtedly broken (it's not keeping Methods in instance vars for nothing) so it wouldn't work. It's just to show that's where (I think) the problem lies.

···

On Thu, 05 Jan 2006 16:09:39 -0000, Jim <narf968@gmail.com> wrote:

$ ruby -v
ruby 1.8.4 (2005-12-24) [i686-linux]

--
Ross Bamford - rosco@roscopeco.remove.co.uk

5

Ross Bamford wrote:

···

On Thu, 05 Jan 2006 16:09:39 -0000, Jim <narf968@gmail.com> wrote:

> $ ruby -v
> ruby 1.8.4 (2005-12-24) [i686-linux]
>

I don't think it's a bug, just that HTTPClient has a Method in one of it's
instance variables, and YAML doesn't have a way to load them (rightly so,
of course).
--
Ross Bamford - rosco@roscopeco.remove.co.uk

I see, that makes sense. I just need to save the parts I'm interested
in - like the cookies. Thanks.