diff --git a/ChangeLog b/ChangeLog
index bdc88b783e..56b9a48872 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Apr 15 11:53:35 2009  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* dir.c (fnmatch_helper): use rb_enc_precise_mbclen and
+	  fail if bytes are invalid. [ruby-dev:38307]
+
 Tue Apr 14 18:11:26 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* dir.c (bracket): if same in bytes, path is matching.
diff --git a/dir.c b/dir.c
index 522818b663..be642d38eb 100644
--- a/dir.c
+++ b/dir.c
@@ -224,7 +224,9 @@ fnmatch_helper(
 	    RETURN(ISEND(p) ? 0 : FNM_NOMATCH);
 	if (ISEND(p))
 	    goto failed;
-	r = rb_enc_mbclen(p, pend, enc);
+	r = rb_enc_precise_mbclen(p, pend, enc);
+	if (!MBCLEN_CHARFOUND_P(r))
+	    goto failed;
 	if (r <= (send-s) && memcmp(p, s, r) == 0) {
 	    p += r;
 	    s += r;
diff --git a/version.h b/version.h
index 7fbe6adb9c..6b9a1e90d7 100644
--- a/version.h
+++ b/version.h
@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.2"
-#define RUBY_RELEASE_DATE "2009-04-14"
+#define RUBY_RELEASE_DATE "2009-04-15"
 #define RUBY_PATCHLEVEL -1
 #define RUBY_BRANCH_NAME "trunk"
 
@@ -8,7 +8,7 @@
 #define RUBY_VERSION_TEENY 1
 #define RUBY_RELEASE_YEAR 2009
 #define RUBY_RELEASE_MONTH 4
-#define RUBY_RELEASE_DAY 14
+#define RUBY_RELEASE_DAY 15
 
 #ifdef RUBY_EXTERN
 RUBY_EXTERN const char ruby_version[];