merges r21496 from trunk into ruby_1_9_1.

* lib/ostruct.rb (OpenStruct#inspect): fixed the recursion check.
  Patch by Kornelius Kalnbach.  [ruby-core:20992].

* test/ostruct/test_ostruct.rb: test for inspect.
  Patch by Kornelius Kalnbach.  [ruby-core:20992].

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@21555 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

3 files changed, 34 insertions, 14 deletions

diff --git a/ChangeLog b/ChangeLog
index 1155f788aa..bd20f49805 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,7 +1,15 @@
+Tue Jan 13 21:45:53 2009  Yuki Sonoda (Yugui)  <yugui@yugui.jp>
+
+	* lib/ostruct.rb (OpenStruct#inspect): fixed the recursion check.
+	  Patch by Kornelius Kalnbach.  [ruby-core:20992].
+
+	* test/ostruct/test_ostruct.rb: test for inspect.
+	  Patch by Kornelius Kalnbach.  [ruby-core:20992].
+
 Tue Jan 13 21:28:14 2009  Yuki Sonoda (Yugui)  <yugui@yugui.jp>
 
 	* object.c (rb_obj_not_match): rdoc.
-	  Patch by Kornelius Kalnbach.
+	  Patch by Kornelius Kalnbach.  [ruby-core:20991]
 
 Tue Jan 13 21:44:30 2009  NAKAMURA Usaku  <usa@ruby-lang.org>
 
diff --git a/lib/ostruct.rb b/lib/ostruct.rb
index f3ed01524b..35a14b4920 100644
--- a/lib/ostruct.rb
+++ b/lib/ostruct.rb
@@ -112,25 +112,23 @@ class OpenStruct
   def inspect
     str = "#<#{self.class}"
 
-    Thread.current[InspectKey] ||= []
-    if Thread.current[InspectKey].include?(self) then
-      str << " ..."
-    else
+    ids = (Thread.current[InspectKey] ||= [])
+    if ids.include?(object_id)
+      return str << ' ...>'
+    end
+
+    ids << object_id
+    begin
       first = true
       for k,v in @table
         str << "," unless first
         first = false
-
-        Thread.current[InspectKey] << v
-        begin
-          str << " #{k}=#{v.inspect}"
-        ensure
-          Thread.current[InspectKey].pop
-        end
+        str << " #{k}=#{v.inspect}"
       end
+      return str << '>'
+    ensure
+      ids.pop
     end
-
-    str << ">"
   end
   alias :to_s :inspect
 
diff --git a/test/ostruct/test_ostruct.rb b/test/ostruct/test_ostruct.rb
index 24ed17f800..79662c6437 100644
--- a/test/ostruct/test_ostruct.rb
+++ b/test/ostruct/test_ostruct.rb
@@ -20,4 +20,18 @@ class TC_OpenStruct < Test::Unit::TestCase
     o2.instance_eval{@table = {:a => 'b'}}
     assert_not_equal(o1, o2)
   end
+  
+  def test_inspect
+    foo = OpenStruct.new
+    assert_equal("#<OpenStruct>", foo.inspect)
+    foo.bar = 1
+    foo.baz = 2
+    assert_equal("#<OpenStruct bar=1, baz=2>", foo.inspect)
+
+    foo = OpenStruct.new
+    foo.bar = OpenStruct.new
+    assert_equal('#<OpenStruct bar=#<OpenStruct>>', foo.inspect)
+    foo.bar.foo = foo
+    assert_equal('#<OpenStruct bar=#<OpenStruct foo=#<OpenStruct ...>>>', foo.inspect)
+  end
 end