updated for version 7.3.1149
Problem:    New regexp engine: Matching plain text could be faster.
Solution:   Detect a plain text match and handle it specifically.  Add
            vim_regfree().
diff --git a/src/gui.c b/src/gui.c
index 0c21976..0bb0422 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -5319,7 +5319,7 @@
 	    }
 	    else
 		MSG(_("No match at cursor, finding next"));
-	    vim_free(regmatch.regprog);
+	    vim_regfree(regmatch.regprog);
 	}
     }