From 729249159e34d20c8c9bf7529ef645fa8ca9de79 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 2 Feb 2005 14:53:36 +0000
Subject: * ext/stringio/stringio.c (strio_truncate): should MEMZERO an
 extended   part.  [ruby-dev:25618]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@7866 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ext/stringio/stringio.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'ext')

diff --git a/ext/stringio/stringio.c b/ext/stringio/stringio.c
index b31f1818b2..de96121367 100644
--- a/ext/stringio/stringio.c
+++ b/ext/stringio/stringio.c
@@ -934,10 +934,14 @@ strio_truncate(self, len)
 {
     VALUE string = writable(StringIO(self))->string;
     long l = NUM2LONG(len);
+    long plen = RSTRING(string)->len;
     if (l < 0) {
 	error_inval("negative legnth");
     }
     rb_str_resize(string, l);
+    if (plen < l) {
+	MEMZERO(RSTRING(string)->ptr + plen, char, l - plen);
+    }
     return len;
 }
 
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