From 78409570a923507a236d263fb349c945e5d4a017 Mon Sep 17 00:00:00 2001
From: Christophe Dumez <chris@qbittorrent.org>
Date: Mon, 15 Dec 2008 17:28:05 +0000
Subject: [PATCH] - Fixed crash when dht_state is missing

---
 src/bittorrent.cpp | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/bittorrent.cpp b/src/bittorrent.cpp
index 0f05fab3c..d0def6ed5 100644
--- a/src/bittorrent.cpp
+++ b/src/bittorrent.cpp
@@ -738,12 +738,15 @@ void bittorrent::saveSessionState() {
 bool bittorrent::enableDHT(bool b) {
   if(b) {
     if(!DHTEnabled) {
-      boost::filesystem::ifstream dht_state_file((misc::qBittorrentPath()+QString::fromUtf8("dht_state")).toUtf8().data(), std::ios_base::binary);
-      dht_state_file.unsetf(std::ios_base::skipws);
       entry dht_state;
-      try{
-        dht_state = bdecode(std::istream_iterator<char>(dht_state_file), std::istream_iterator<char>());
-      }catch (std::exception&) {}
+      QString dht_state_path = misc::qBittorrentPath()+QString::fromUtf8("dht_state");
+      if(QFile::exists(dht_state_path)) {
+        boost::filesystem::ifstream dht_state_file(dht_state_path.toUtf8().data(), std::ios_base::binary);
+        dht_state_file.unsetf(std::ios_base::skipws);
+        try{
+          dht_state = bdecode(std::istream_iterator<char>(dht_state_file), std::istream_iterator<char>());
+        }catch (std::exception&) {}
+     }
       try {
   s->start_dht(dht_state);
   s->add_dht_router(std::make_pair(std::string("router.bittorrent.com"), 6881));