From: WATANABE Hirofumi <eban@...>
Date: 1997-11-03T00:00:25+09:00
Subject: [ruby-dev:788] [BUG] "".sub "", ""

わたなべです.

p("".sub "", "") の結果が "\000" になります.


--- string.c.orig	Wed Sep 24 18:16:08 1997
+++ string.c	Sun Nov  2 16:00:00 1997
@@ -814,3 +814,3 @@
 	     */
-	    str_cat(result, str->ptr+END(0), 1);
+	    if (str->len) str_cat(result, str->ptr+END(0), 1);
 	    offset = END(0)+1;
@@ -900,3 +900,3 @@
 	str_cat(result, RSTRING(val)->ptr, RSTRING(val)->len);
-	if (null) {
+	if (null && str->len) {
 	    str_cat(result, str->ptr+offset-1, 1);