diff --git a/ChangeLog b/ChangeLog
index 0e34a702f4..efbcc1e025 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+Wed Jan 29 14:26:10 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* enumerator.c (enumerator_with_index): should not store local variable
+	  address to memoise the arguments.  it is invalidated after the return.
+	  [ruby-core:58692] [Bug #9178]
+
+Wed Jan 29 14:26:10 2014  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* enumerator.c (enumerator_with_index): try to convert given offset to
+	  integer. fix bug introduced in r39594.
+
 Wed Jan 29 14:20:11 2014  Eric Hodel  <drbrain@segment7.net>
 
 	* enumerator.c (enumerator_with_index):  Restore handling of a nil memo
diff --git a/common.mk b/common.mk
index ccc964701e..e48cdc5776 100644
--- a/common.mk
+++ b/common.mk
@@ -619,7 +619,7 @@ encoding.$(OBJEXT): {$(VPATH)}encoding.c $(RUBY_H_INCLUDES) \
   {$(VPATH)}internal.h
 enum.$(OBJEXT): {$(VPATH)}enum.c $(RUBY_H_INCLUDES) {$(VPATH)}node.h \
   {$(VPATH)}util.h $(ID_H_INCLUDES)
-enumerator.$(OBJEXT): {$(VPATH)}enumerator.c $(RUBY_H_INCLUDES)
+enumerator.$(OBJEXT): {$(VPATH)}enumerator.c $(RUBY_H_INCLUDES) {$(VPATH)}node.h
 error.$(OBJEXT): {$(VPATH)}error.c {$(VPATH)}known_errors.inc \
   $(RUBY_H_INCLUDES) $(VM_CORE_H_INCLUDES) $(ENCODING_H_INCLUDES) \
   {$(VPATH)}debug.h \
diff --git a/enumerator.c b/enumerator.c
index 451327569e..ef99bf85fa 100644
--- a/enumerator.c
+++ b/enumerator.c
@@ -13,6 +13,7 @@
 ************************************************/
 
 #include "ruby/ruby.h"
+#include "node.h"
 
 /*
  * Document-class: Enumerator
@@ -368,9 +369,9 @@ enumerator_each(VALUE obj)
 static VALUE
 enumerator_with_index_i(VALUE val, VALUE m, int argc, VALUE *argv)
 {
-    VALUE *memo = (VALUE *)m;
-    VALUE idx = *memo;
-    *memo = rb_int_succ(idx);
+    NODE *memo = (NODE *)m;
+    VALUE idx = memo->u1.value;
+    memo->u1.value = rb_int_succ(idx);
 
     if (argc <= 1)
 	return rb_yield_values(2, val, idx);
@@ -401,7 +402,7 @@ enumerator_with_index(int argc, VALUE *argv, VALUE obj)
 	memo = INT2FIX(0);
     else
 	memo = rb_to_int(memo);
-    return enumerator_block_call(obj, enumerator_with_index_i, (VALUE)&memo);
+    return enumerator_block_call(obj, enumerator_with_index_i, (VALUE)NEW_MEMO(memo, 0, 0));
 }
 
 /*
diff --git a/node.h b/node.h
index bb96107711..a15e15781b 100644
--- a/node.h
+++ b/node.h
@@ -447,6 +447,7 @@ typedef struct RNode {
 #define NEW_ATTRASGN(r,m,a) NEW_NODE(NODE_ATTRASGN,r,m,a)
 #define NEW_PRELUDE(p,b) NEW_NODE(NODE_PRELUDE,p,b,0)
 #define NEW_OPTBLOCK(a) NEW_NODE(NODE_OPTBLOCK,a,0,0)
+#define NEW_MEMO(a,b,c) NEW_NODE(NODE_MEMO,a,b,c)
 
 #if defined __GNUC__ && __GNUC__ >= 4
 #pragma GCC visibility push(default)
diff --git a/test/ruby/test_enumerator.rb b/test/ruby/test_enumerator.rb
index fabb266f8f..feaa2de698 100644
--- a/test/ruby/test_enumerator.rb
+++ b/test/ruby/test_enumerator.rb
@@ -1,4 +1,5 @@
 require 'test/unit'
+require_relative "envutil"
 
 class TestEnumerator < Test::Unit::TestCase
   def setup
@@ -105,6 +106,28 @@ class TestEnumerator < Test::Unit::TestCase
     assert_equal([[1,s],[2,s+1],[3,s+2]], @obj.to_enum(:foo, 1, 2, 3).with_index(s).to_a, bug8010)
   end
 
+  def test_with_index_nonnum_offset
+    bug8010 = '[ruby-dev:47131] [Bug #8010]'
+    s = Object.new
+    def s.to_int; 1 end
+    assert_equal([[1,1],[2,2],[3,3]], @obj.to_enum(:foo, 1, 2, 3).with_index(s).to_a, bug8010)
+  end
+
+  def test_with_index_string_offset
+    bug8010 = '[ruby-dev:47131] [Bug #8010]'
+    assert_raise(TypeError, bug8010){ @obj.to_enum(:foo, 1, 2, 3).with_index('1').to_a }
+  end
+
+  def test_with_index_dangling_memo
+    bug9178 = '[ruby-core:58692] [Bug #9178]'
+    assert_in_out_err([], <<-"end;", ["Enumerator", "[false, [1]]"], [], bug9178)
+    bug = "#{bug9178}"
+    e = [1].to_enum(:chunk).with_index {|c,i| i == 5}
+    puts e.class
+    p e.to_a[0]
+    end;
+  end
+
   def test_with_object
     obj = [0, 1]
     ret = (1..10).each.with_object(obj) {|i, memo|
diff --git a/version.h b/version.h
index d0f38330ba..ffd523fd26 100644
--- a/version.h
+++ b/version.h
@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.3"
-#define RUBY_PATCHLEVEL 499
+#define RUBY_PATCHLEVEL 500
 
 #define RUBY_RELEASE_DATE "2014-01-29"
 #define RUBY_RELEASE_YEAR 2014