nobu	2012-12-12 13:40:55 +0900 (Wed, 12 Dec 2012)

  New Revision: 38337

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=38337

  Log:
    vm_insnhelper.c: no warnings for non-object
    
    * vm_insnhelper.c (vm_getivar): no uninitialized instance variables
      warnings for non-object if attr method.

  Modified files:
    trunk/ChangeLog
    trunk/test/ruby/test_module.rb
    trunk/vm_insnhelper.c

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 38336)
+++ ChangeLog	(revision 38337)
@@ -1,3 +1,8 @@ https://github.com/ruby/ruby/blob/trunk/ChangeLog#L1
+Wed Dec 12 13:40:52 2012  Nobuyoshi Nakada  <nobu@r...>
+
+	* vm_insnhelper.c (vm_getivar): no uninitialized instance variables
+	  warnings for non-object if attr method.
+
 Wed Dec 12 06:43:37 2012  Benoit Daloze  <eregontp@g...>
 
 	* iseq.c (rb_iseq_parameters): fix limit for optional arguments.
Index: vm_insnhelper.c
===================================================================
--- vm_insnhelper.c	(revision 38336)
+++ vm_insnhelper.c	(revision 38337)
@@ -538,6 +538,8 @@ vm_getivar(VALUE obj, ID id, IC ic, rb_c https://github.com/ruby/ruby/blob/trunk/vm_insnhelper.c#L538
 	return val;
     }
 #endif	/* USE_IC_FOR_IVAR */
+    if (is_attr)
+	return rb_attr_get(obj, id);
     return rb_ivar_get(obj, id);
 }
 
Index: test/ruby/test_module.rb
===================================================================
--- test/ruby/test_module.rb	(revision 38336)
+++ test/ruby/test_module.rb	(revision 38337)
@@ -1513,4 +1513,67 @@ class TestModule < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_module.rb#L1513
       end
     end
   end
+
+  class AttrTest
+    class << self
+      attr_accessor :cattr
+    end
+    attr_accessor :iattr
+    def ivar
+      @ivar
+    end
+  end
+
+  def test_uninitialized_instance_variable
+    a = AttrTest.new
+    stderr = EnvUtil.verbose_warning do
+      assert_nil(a.ivar)
+    end
+    assert_match(/instance variable @ivar not initialized/, stderr)
+    a.instance_variable_set(:@ivar, 42)
+    stderr = EnvUtil.verbose_warning do
+      assert_equal(42, a.ivar)
+    end
+    assert_equal("", stderr)
+  end
+
+  def test_uninitialized_attr
+    a = AttrTest.new
+    stderr = EnvUtil.verbose_warning do
+      assert_nil(a.iattr)
+    end
+    assert_equal("", stderr)
+    a.iattr = 42
+    stderr = EnvUtil.verbose_warning do
+      assert_equal(42, a.iattr)
+    end
+    assert_equal("", stderr)
+  end
+
+  def test_uninitialized_attr_class
+    stderr = EnvUtil.verbose_warning do
+      assert_nil(AttrTest.cattr)
+    end
+    assert_equal("", stderr)
+    AttrTest.cattr = 42
+    stderr = EnvUtil.verbose_warning do
+      assert_equal(42, AttrTest.cattr)
+    end
+    assert_equal("", stderr)
+  end
+
+  def test_uninitialized_attr_non_object
+    a = Class.new(Array) do
+      attr_accessor :iattr
+    end.new
+    stderr = EnvUtil.verbose_warning do
+      assert_nil(a.iattr)
+    end
+    assert_equal("", stderr)
+    a.iattr = 42
+    stderr = EnvUtil.verbose_warning do
+      assert_equal(42, a.iattr)
+    end
+    assert_equal("", stderr)
+  end
 end

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