From: Yasuhiro Fukuma <yasuf@...>
Date: 1999-02-12T16:49:11+09:00
Subject: [ruby-dev:5051] [BUG] String#inspect (Re: Ruby 1.3.1-990210)

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福間@福岡 です。

76バイト目付近にマルチバイト文字を含む文字列をinspectすると、落ちることが
あります:

  $ ruby-1.3 -ve 'p "\xa4\xa2"*38'
  ruby 1.3.1(99/02/10) [i386-freebsd3.0]
  "ああああああああああああああああああああああああああああああああああああああ"
  $ ruby-1.3 -e 'p "\xa4\xa2"*39'
  /tmp/rbD29779:1: [BUG] Segmentation fault
  Abort trap
  $ ruby-1.3 -e '("a"*74 + "\xa4\xa2"*2).inspect'
  /tmp/rbw29780:1: [BUG] Segmentation fault
  Abort trap
---
 Yasuhiro Fukuma (福間 康弘) as Yasu.F @ Kitakyushu.Fukuoka.Japan
 Web site: http://www8.big.or.jp/~yasuf/
 “君の主人公は君だ。”

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--- string.c.orig	Tue Feb  9 15:08:23 1999
+++ string.c	Fri Feb 12 16:16:47 1999
@@ -1365,11 +1365,11 @@
     while (p < pend) {
 	char c = *p++;
 	if (ismbchar(c) && p < pend) {
-	    int len = mbclen(c)-1;
+	    int len = mbclen(c);
 
 	    CHECK(len);
 	    *b++ = c;
-	    while (len--) {
+	    while (--len) {
 		*b++ = *p++;
 	    }
 	}

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