[Patch] JSON.generate raises exception in v3.0.2 + json_pure => '~>1.4.3'

Patch file with test & fix...

From f52f3295196d48015c1bd5f337a5978e14c3acd6 Mon Sep 17 00:00:00 2001
From: Kenneth Mayer <kmayer@bitwrangler.com>
Date: Thu, 2 Dec 2010 09:11:08 -0800
Subject: [PATCH] bug: JSON::Pure reuses a State object for options

Fixes [#6047 state:resolved]

An earlier commit (33b95) tries to merging encoding
options (active_support/json/encoding.rb:#options_for)
would raise a method_missing error -- but only
if you were using json_pure.

This converts State objects back to an options hash
via :to_h
---
 activesupport/lib/active_support/json/encoding.rb |    4 ++--
 activesupport/test/json/encoding_test.rb          |    5 +++++
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/activesupport/lib/active_support/json/encoding.rb b/activesupport/lib/active_support/json/encoding.rb
index c8cac52..e8d14b3 100644
--- a/activesupport/lib/active_support/json/encoding.rb
+++ b/activesupport/lib/active_support/json/encoding.rb
@@ -36,8 +36,8 @@ module ActiveSupport
       class Encoder
         attr_reader :options
 
-        def initialize(options = nil)
-          @options = options
+        def initialize(options_or_state = nil)
+          @options = options_or_state.respond_to?(:to_h) ? options_or_state.to_h : options_or_state
           @seen = []
         end
 
diff --git a/activesupport/test/json/encoding_test.rb b/activesupport/test/json/encoding_test.rb
index e0494de..622eca2 100644
--- a/activesupport/test/json/encoding_test.rb
+++ b/activesupport/test/json/encoding_test.rb
@@ -125,6 +125,11 @@ class TestJSONEncoding < Test::Unit::TestCase
     a[:sub] << a
     assert_raise(ActiveSupport::JSON::Encoding::CircularReferenceError) { ActiveSupport::JSON.encode(a) }
   end
+  
+  def test_no_exception_raised_with_json_pure
+    require 'json/pure/generator'
+    assert_equal "[]", JSON::Pure::Generator::State.new.generate([])
+  end
 
   def test_hash_key_identifiers_are_always_quoted
     values = {0 => 0, 1 => 1, :_ => :_, "$" => "$", "a" => "a", :A => :A, :A0 => :A0, "A0B" => "A0B"}
-- 
1.7.2.2

Confirmed in rails 3.0.3

gucci watches