From: Adam Bozanich <adam.boz@...>
Date: 2007-04-26T17:09:42+09:00
Subject: [patch] gsub with backslash characters in replacement string

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Hello, spotted this one the other day:

irb(main):001:0> '\\'.gsub('\\','\\\\')
=> "\\"
irb(main):002:0> '\\'.gsub('\\','\\\\\\')
=> "\\\\"

The following patch seems to fix things on my system

-Adam

Index: re.c
===================================================================
--- re.c        (revision 12221)
+++ re.c        (working copy)
@@ -2151,10 +2151,6 @@
            if (no == 0) continue;
            break;

-         case '\\':
-           rb_str_buf_cat(val, s-1, 1);
-           continue;
-
          default:
            rb_str_buf_cat(val, s-2, 2);
            continue;

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Hello, spotted this one the other day:<br><br>irb(main):001:0&gt; &#39;\\&#39;.gsub(&#39;\\&#39;,&#39;\\\\&#39;)<br>=&gt; &quot;\\&quot;<br>irb(main):002:0&gt; &#39;\\&#39;.gsub(&#39;\\&#39;,&#39;\\\\\\&#39;)<br>=&gt; &quot;\\\\&quot;
<br><br>The following patch seems to fix things on my system<br><br>-Adam<br><br>Index: re.c<br>===================================================================<br>--- re.c&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (revision 12221)<br>+++ re.c&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (working copy)
<br>@@ -2151,10 +2151,6 @@<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (no == 0) continue;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; break;<br>&nbsp;<br>-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; case &#39;\\&#39;:<br>-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rb_str_buf_cat(val, s-1, 1);<br>-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; continue;<br>-<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; default:<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rb_str_buf_cat(val, s-2, 2);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; continue;<br><br>

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