diff --git a/ChangeLog b/ChangeLog
index dc4345a2ef..1f726bd624 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Tue Jan  8 14:41:41 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* vm_core.h (rb_iseq_t): move flip_cnt from struct iseq_compile_data,
+	  because it has same life span as enclosing iseq.  [Bug #7671]
+	  [ruby-core:51296]
+
 Mon Jan  7 23:43:00 2013  Kenta Murata  <mrkn@mrkn.jp>
 
 	* ext/bigdecimal/bigdecimal.c (rmpd_power_by_big_decimal):
diff --git a/compile.c b/compile.c
index 7dffe08141..35feaa3122 100644
--- a/compile.c
+++ b/compile.c
@@ -5051,12 +5051,11 @@ iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE * node, int poped)
 	LABEL *lend = NEW_LABEL(nd_line(node));
 	LABEL *lfin = NEW_LABEL(nd_line(node));
 	LABEL *ltrue = NEW_LABEL(nd_line(node));
-	struct iseq_compile_data *data = iseq->local_iseq->compile_data;
+	rb_iseq_t *local_iseq = iseq->local_iseq;
 	rb_num_t cnt;
 	VALUE key;
 
-	if (!data) data = iseq->compile_data;
-	cnt = data->flip_cnt++ + DEFAULT_SPECIAL_VAR_COUNT;
+	cnt = local_iseq->flip_cnt++ + DEFAULT_SPECIAL_VAR_COUNT;
 	key = INT2FIX(cnt);
 
 	ADD_INSN2(ret, nd_line(node), getspecial, key, INT2FIX(0));
diff --git a/iseq.h b/iseq.h
index 4a7965adf9..0790529638 100644
--- a/iseq.h
+++ b/iseq.h
@@ -98,7 +98,6 @@ struct iseq_compile_data {
     struct iseq_compile_data_storage *storage_current;
     int last_line;
     int last_coverable_line;
-    int flip_cnt;
     int label_no;
     int node_level;
     const rb_compile_option_t *option;
diff --git a/test/ruby/test_flip.rb b/test/ruby/test_flip.rb
index 8d7cdd03ad..bd14228a8c 100644
--- a/test/ruby/test_flip.rb
+++ b/test/ruby/test_flip.rb
@@ -10,4 +10,12 @@ class TestFlip < Test::Unit::TestCase
       2000.times {eval %[(foo..bar) ? 1 : 2]}
     end
   end
+
+  def test_shared_eval
+    bug7671 = '[ruby-core:51296]'
+    vs = (1..9).to_a
+    vs.select {|n| if n==2..n==16 then 1 end}
+    v = eval("vs.select {|n| if n==3..n==6 then 1 end}")
+    assert_equal([*3..6], v, bug7671)
+  end
 end
diff --git a/vm_core.h b/vm_core.h
index 6ecbd70289..f1dc013313 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -306,6 +306,7 @@ struct rb_iseq_struct {
 
     /* misc */
     ID defined_method_id;	/* for define_method */
+    rb_num_t flip_cnt;
 
     /* used at compile time */
     struct iseq_compile_data *compile_data;