3 files changed, 9 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index a03acf5048..005a76f4e7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sun Jun 15 22:18:30 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* regex.c (re_search): string might be NULL.  [ruby-core:16478]
+
 Sun Jun 15 22:16:21 2008  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* time.c (rb_strftime): check errno to detect strftime(3)'s error.
diff --git a/regex.c b/regex.c
index a7a831286e..45f7e20738 100644
--- a/regex.c
+++ b/regex.c
@@ -3177,6 +3177,10 @@ re_search(bufp, string, size, startpos, range, regs)
   /* Check for out-of-range starting position.  */
   if (startpos < 0  ||  startpos > size)
     return -1;
+  if (!string) {
+    if (size == 0) string = "";
+    else return -1;
+  }
 
   /* Update the fastmap now if not correct already.  */
   if (fastmap && !bufp->fastmap_accurate) {
diff --git a/version.h b/version.h
index 87c873afc4..ca10a89e59 100644
--- a/version.h
+++ b/version.h
@@ -2,7 +2,7 @@
 #define RUBY_RELEASE_DATE "2008-06-15"
 #define RUBY_VERSION_CODE 186
 #define RUBY_RELEASE_CODE 20080615
-#define RUBY_PATCHLEVEL 197
+#define RUBY_PATCHLEVEL 198
 
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 8