3 files changed, 12 insertions, 5 deletions
diff --git a/ChangeLog b/ChangeLog
index 79ffe6566f..92b3fcafc2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Thu Jul 15 15:47:32 2010  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* regexec.c (onig_search): don't skip non-ANYCHARs when
+	  .* fails to match. This causes to fail matching
+	  ANYCHAR_STAR with LOOK_BEHIND. This fix is workaround
+	  and disable the optimization. [ruby-dev:41851]
+
 Thu Jul 15 06:11:29 2010  Aaron Patterson <aaron@tenderlovemaking.com>
 
 	* lib/rdoc/markup/attribute_manager.rb: fixing ri output when special
diff --git a/regexec.c b/regexec.c
index 24422b1671..c78d8ea998 100644
--- a/regexec.c
+++ b/regexec.c
@@ -3636,11 +3636,6 @@ onig_search(regex_t* reg, const UChar* str, const UChar* end,
             MATCH_AND_RETURN_CHECK(orig_range);
             prev = s;
             s += enclen(reg->enc, s, end);
-
-            while (!ONIGENC_IS_MBC_NEWLINE(reg->enc, prev, end) && s < range) {
-              prev = s;
-              s += enclen(reg->enc, s, end);
-            }
           } while (s < range);
           goto mismatch;
         }
diff --git a/test/ruby/test_regexp.rb b/test/ruby/test_regexp.rb
index 9fd948d6a1..9e850b902e 100644
--- a/test/ruby/test_regexp.rb
+++ b/test/ruby/test_regexp.rb
@@ -11,6 +11,11 @@ class TestRegexp < Test::Unit::TestCase
     $VERBOSE = @verbose
   end
 
+  def test_ruby_dev_999
+    assert_match(/(?<=a).*b/, "aab")
+    assert_match(/(?<=\u3042).*b/, "\u3042ab")
+  end
+
   def test_ruby_core_27247
     assert_match(/(a){2}z/, "aaz")
   end