Fix possible crash on qBittorrent shutdown

src/qtlibtorrent/qbtsession.cpp

@@ -1534,6 +1534,7 @@ void QBtSession::saveFastResumeData() {
   for(torrentIT = torrents.begin(); torrentIT != torrents.end(); torrentIT++) {
     QTorrentHandle h = QTorrentHandle(*torrentIT);
     if(!h.is_valid() || !h.has_metadata()) continue;
+    try {
       if(isQueueingEnabled())
         TorrentPersistentData::savePriority(h);
       // Actually with should save fast resume data for paused files too
@@ -1541,6 +1542,7 @@ void QBtSession::saveFastResumeData() {
       if(h.state() == torrent_status::checking_files || h.state() == torrent_status::queued_for_checking) continue;
       h.save_resume_data();
       ++num_resume_data;
+    } catch(libtorrent::invalid_handle&) {}
   }
   while (num_resume_data > 0) {
     alert const* a = s->wait_for_alert(seconds(30));
@@ -1556,6 +1558,7 @@ void QBtSession::saveFastResumeData() {
       s->pop_alert();
       try {
         // Remove torrent from session
+        if(rda->handle.is_valid())
           s->remove_torrent(rda->handle);
       }catch(libtorrent::libtorrent_exception){}
       continue;
@@ -1571,6 +1574,7 @@ void QBtSession::saveFastResumeData() {
     QDir torrentBackup(misc::BTBackupLocation());
     const QTorrentHandle h(rd->handle);
     if(!h.is_valid()) continue;
+    try {
       // Remove old fastresume file if it exists
       const QString file = torrentBackup.absoluteFilePath(h.hash()+".fastresume");
       if(QFile::exists(file))
@@ -1581,6 +1585,7 @@ void QBtSession::saveFastResumeData() {
       // Remove torrent from session
       s->remove_torrent(rd->handle);
       s->pop_alert();
+    } catch(libtorrent::invalid_handle&){}
   }
 }
 

src/torrentfilesmodel.h

@@ -46,6 +46,9 @@ enum FilePriority {IGNORED=0, NORMAL=1, HIGH=2, MAXIMUM=7};
 enum TreeItemType {TFILE, FOLDER, ROOT};
 
 class TreeItem {
+private:
+  enum TreeItemColumns {COL_NAME, COL_SIZE, COL_PROGRESS, COL_PRIO};
+
 private:
   QList<TreeItem*> childItems;
   QList<QVariant> itemData;