fix to add pointer range check previous right_adjust_char_head()

diff --git a/src/regexec.c b/src/regexec.c
index 38861c2d438024978e8b7b2d50ba4a19ca251ed5..c1f19a4b1001c2b5c714a8e13858d5ff830f4341 100644 (file)
--- a/src/regexec.c
+++ b/src/regexec.c
@@ -4234,7 +4234,8 @@ sunday_quick_search_case_fold(regex_t* reg,
 #else
     /* This is faster than prev code for long text.  ex: /(?i)Twain/  */
     s += skip;
-    s = onigenc_get_right_adjust_char_head(enc, text, s);
+    if (s < end)
+      s = onigenc_get_right_adjust_char_head(enc, text, s);
 #endif
   }