* ext/psych/lib/psych/visitors/to_ruby.rb: support objects that are

  marshalable, but inherit from basic object.
  Thanks Sean Griffin <sean@thoughtbot.com>

* ext/psych/lib/psych/visitors/yaml_tree.rb: ditto

* test/psych/test_marshalable.rb: test for fix

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48675 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 29 insertions, 0 deletions

diff --git a/ext/psych/lib/psych/visitors/to_ruby.rb b/ext/psych/lib/psych/visitors/to_ruby.rb
index e74d5d4bc5..e696ebd4ff 100644
--- a/ext/psych/lib/psych/visitors/to_ruby.rb
+++ b/ext/psych/lib/psych/visitors/to_ruby.rb
@@ -271,6 +271,21 @@ module Psych
           end
           map
 
+        when /^!ruby\/marshalable:(.*)$/
+          name = $1
+          klass = resolve_class(name)
+          obj = register(o, klass.allocate)
+
+          if obj.respond_to?(:init_with)
+            init_with(obj, revive_hash({}, o), o)
+          elsif obj.respond_to?(:marshal_load)
+            marshal_data = o.children.map(&method(:accept))
+            obj.marshal_load(marshal_data)
+            obj
+          else
+            raise ArgumentError, "Cannot deserialize #{name}"
+          end
+
         else
           revive_hash(register(o, {}), o)
         end
diff --git a/ext/psych/lib/psych/visitors/yaml_tree.rb b/ext/psych/lib/psych/visitors/yaml_tree.rb
index 3f2427b8d0..989e1f0de5 100644
--- a/ext/psych/lib/psych/visitors/yaml_tree.rb
+++ b/ext/psych/lib/psych/visitors/yaml_tree.rb
@@ -27,6 +27,8 @@ module Psych
 
         def key? target
           @obj_to_node.key? target.object_id
+        rescue NoMethodError
+          false
         end
 
         def id_for target
@@ -411,6 +413,18 @@ module Psych
         end
       end
 
+      def visit_BasicObject o
+        tag = Psych.dump_tags[o.class]
+        tag ||= "!ruby/marshalable:#{o.class.name}"
+
+        map = @emitter.start_mapping(nil, tag, false, Nodes::Mapping::BLOCK)
+        register(o, map)
+
+        o.marshal_dump.each(&method(:accept))
+
+        @emitter.end_mapping
+      end
+
       private
       # FIXME: Remove the index and count checks in Psych 3.0
       NULL         = "\x00"