diff --git a/ChangeLog b/ChangeLog
index 4ec2c131a5..97c8d24423 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Thu Feb 28 20:22:04 2013  Koichi Sasada  <ko1@atdot.net>
+
+	* iseq.c (iseq_data_to_ary): fix condition.
+	  r34303 introduces a bug to avoid all line information from
+	  a result of ISeq#to_a. This is a regression problem from 2.0.0p0.
+
+	* test/ruby/test_iseq.rb: add a test of lines after ISeq#to_a.
+
 Thu Feb 28 08:20:33 2013  Eric Hodel  <drbrain@segment7.net>
 
 	* lib/rubygems/available_set.rb:  Undent for style
diff --git a/iseq.c b/iseq.c
index a296544320..15c1fe13ae 100644
--- a/iseq.c
+++ b/iseq.c
@@ -1841,7 +1841,7 @@ iseq_data_to_ary(rb_iseq_t *iseq)
 	    rb_ary_push(body, (VALUE)label);
 	}
 
-	if (iseq->line_info_size < ti && iseq->line_info_table[ti].position == pos) {
+	if (ti < iseq->line_info_size && iseq->line_info_table[ti].position == pos) {
 	    line = iseq->line_info_table[ti].line_no;
 	    rb_ary_push(body, INT2FIX(line));
 	    ti++;
diff --git a/test/ruby/test_iseq.rb b/test/ruby/test_iseq.rb
index 829b72ffdc..230cea9b91 100644
--- a/test/ruby/test_iseq.rb
+++ b/test/ruby/test_iseq.rb
@@ -9,6 +9,18 @@ class TestISeq < Test::Unit::TestCase
     assert_normal_exit('p RubyVM::InstructionSequence.compile("1", "mac", "", 0).to_a', bug5894)
   end
 
+  def test_to_a_lines
+    src = <<-EOS
+    p __LINE__ # 1
+    p __LINE__ # 2
+               # 3
+    p __LINE__ # 4
+    EOS
+    body = RubyVM::InstructionSequence.new(src).to_a[13]
+    lines = body.find_all{|e| e.kind_of? Fixnum}
+    assert_equal [1, 2, 4], lines
+  end
+
   def test_unsupport_type
     ary = RubyVM::InstructionSequence.compile("p").to_a
     ary[9] = :foobar