MacRuby does not use Syck

other_code_path.diff

diff --git a/lib/rubygems/specification.rb b/lib/rubygems/specification.rb
index e873923..392c91b 100644
--- a/lib/rubygems/specification.rb
+++ b/lib/rubygems/specification.rb
@@ -1921,12 +1921,12 @@ class Gem::Specification
   end
 
   def to_yaml(opts = {}) # :nodoc:
-    if YAML.const_defined?(:ENGINE) && !YAML::ENGINE.syck? then
+    # XXX MACRUBY does not have syck, but does not have YAML::ENGINE either
+    #if YAML.const_defined?(:ENGINE) && !YAML::ENGINE.syck? then
+    if true then
       super.gsub(/ !!null \n/, " \n")
     else
-      # XXX MACRUBY our quick_emit is different than syck
-      #YAML.quick_emit object_id, opts do |out|
-      YAML.quick_emit nil do |out|
+      YAML.quick_emit object_id, opts do |out|
         out.map taguri, to_yaml_style do |map|
           encode_with map
         end

Output from trying to make a gem

 ± rake gem
(in /Users/mrada/Developer/AXElements)
rake aborted!
unsupported YAML output type Hash

(See full trace by running task with --trace)
[1]    57924 exit 1     noglob rake gem