Fix possibly uncaught invalid_handle exception

src/mainwindow.cpp

@@ -526,7 +526,14 @@ void MainWindow::displayRSSTab() const {
 void MainWindow::askRecursiveTorrentDownloadConfirmation(const QTorrentHandle &h) {
   Preferences pref;
   if(pref.recursiveDownloadDisabled()) return;
-  QMessageBox confirmBox(QMessageBox::Question, tr("Recursive download confirmation"), tr("The torrent %1 contains torrent files, do you want to proceed with their download?").arg(h.name()));
+  // Get Torrent name
+  QString torrent_name;
+  try {
+    torrent_name = h.name();
+  } catch(invalid_handle&){
+    return;
+  }
+  QMessageBox confirmBox(QMessageBox::Question, tr("Recursive download confirmation"), tr("The torrent %1 contains torrent files, do you want to proceed with their download?").arg(torrent_name));
   QPushButton *yes = confirmBox.addButton(tr("Yes"), QMessageBox::YesRole);
   /*QPushButton *no = */confirmBox.addButton(tr("No"), QMessageBox::NoRole);
   QPushButton *never = confirmBox.addButton(tr("Never"), QMessageBox::NoRole);

src/qtlibtorrent/qbtsession.cpp

@@ -1880,23 +1880,23 @@ void QBtSession::setProxySettings(const proxy_settings &proxySettings) {
 }
 
 void QBtSession::recursiveTorrentDownload(const QTorrentHandle &h) {
+  try {
     torrent_info::file_iterator it;
     for(it = h.get_torrent_info().begin_files(); it != h.get_torrent_info().end_files(); it++)  {
       const QString torrent_relpath = h.filepath(*it);
       if(torrent_relpath.endsWith(".torrent")) {
         addConsoleMessage(tr("Recursive download of file %1 embedded in torrent %2", "Recursive download of test.torrent embedded in torrent test2").arg(torrent_relpath).arg(h.name()));
         const QString torrent_fullpath = h.save_path()+QDir::separator()+torrent_relpath;
-      try {
+
         boost::intrusive_ptr<torrent_info> t = new torrent_info(torrent_fullpath.toUtf8().constData());
         const QString sub_hash = misc::toQString(t->info_hash());
         // Passing the save path along to the sub torrent file
         TorrentTempData::setSavePath(sub_hash, h.save_path());
         addTorrent(torrent_fullpath);
-      } catch(std::exception&) {
-        qDebug("Caught error loading torrent");
-        addConsoleMessage(tr("Unable to decode %1 torrent file.").arg(torrent_fullpath), QString::fromUtf8("red"));
       }
     }
+  } catch(std::exception&) {
+    qDebug("Caught error loading torrent");
   }
 }