From 55d8b0625fa4aa34e0debefb1881a5a3ae3c000f Mon Sep 17 00:00:00 2001
From: arvidn <arvid@cs.umu.se>
Date: Tue, 28 Jun 2016 08:43:31 -0400
Subject: [PATCH] fix

---
 include/libtorrent/stack_allocator.hpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/libtorrent/stack_allocator.hpp b/include/libtorrent/stack_allocator.hpp
index cfe084acf..926d8d46e 100644
--- a/include/libtorrent/stack_allocator.hpp
+++ b/include/libtorrent/stack_allocator.hpp
@@ -77,7 +77,10 @@ namespace libtorrent { namespace aux
 #pragma clang diagnostic pop
 #endif
 
-			m_storage.resize(len > 512 ? 512 : len);
+			if (len < 0) return copy_string("(format error)");
+
+			// +1 is to include the 0-terminator
+			m_storage.resize(ret + (len > 512 ? 512 : len) + 1);
 			return ret;
 		}