From 0c0f75440092adc29c5b6edac00ded1899c67805 Mon Sep 17 00:00:00 2001
From: akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 19 Aug 2009 17:32:56 +0000
Subject: [PATCH] * enumerator.c (next_init): don't clear feedvalue.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24588 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog                    |  4 ++++
 enumerator.c                 |  1 -
 test/ruby/test_enumerator.rb | 34 ++++++++++++++++++++++++++++++++++
 3 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 3e463bc45f..7555428b27 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Aug 20 02:32:08 2009  Tanaka Akira  <akr@fsij.org>
+
+	* enumerator.c (next_init): don't clear feedvalue.
+
 Thu Aug 20 01:28:42 2009  Tanaka Akira  <akr@fsij.org>
 
 	* enumerator.c: implement Enumerator#{next_values,peek_values,feed}
diff --git a/enumerator.c b/enumerator.c
index a8120aa79b..ad49de8820 100644
--- a/enumerator.c
+++ b/enumerator.c
@@ -592,7 +592,6 @@ next_init(VALUE obj, struct enumerator *e)
     e->dst = curr;
     e->fib = rb_fiber_new(next_i, obj);
     e->lookahead = Qundef;
-    e->feedvalue = Qundef;
 }
 
 /*
diff --git a/test/ruby/test_enumerator.rb b/test/ruby/test_enumerator.rb
index 333dac79cb..e70a783a00 100644
--- a/test/ruby/test_enumerator.rb
+++ b/test/ruby/test_enumerator.rb
@@ -266,6 +266,40 @@ class TestEnumerator < Test::Unit::TestCase
     assert_raise(TypeError) { e.feed 2 }
   end
 
+  def test_feed_before_first_next
+    o = Object.new
+    def o.each(ary)
+      ary << yield
+      ary << yield
+      ary << yield
+    end
+    ary = []
+    e = o.to_enum(:each, ary)
+    e.feed 1
+    e.next
+    e.next
+    assert_equal([1], ary)
+  end
+
+  def test_rewind_clear_feed
+    o = Object.new
+    def o.each(ary)
+      ary << yield
+      ary << yield
+      ary << yield
+    end
+    ary = []
+    e = o.to_enum(:each, ary)
+    e.next
+    e.feed 1
+    e.next
+    e.feed 2
+    e.rewind
+    e.next
+    e.next
+    assert_equal([1,nil], ary)
+  end
+
   def test_feed_yielder
     x = nil
     e = Enumerator.new {|y| x = y.yield; 10 }