fix #1280

src/librssguard/database/databasequeries.cpp

@@ -564,6 +564,7 @@ bool DatabaseQueries::removeUnwantedArticlesFromFeed(const QSqlDatabase& db,
     // No articles will be removed, quitting.
     return false;
   }
+
   // We find datetime stamp of oldest article which will be NOT moved/removed.
   QSqlQuery q(db);
 
@@ -576,6 +577,7 @@ bool DatabaseQueries::removeUnwantedArticlesFromFeed(const QSqlDatabase& db,
                 "  Messages.is_pdeleted = 0 "
                 "ORDER BY Messages.date_created DESC "
                 "LIMIT 1 OFFSET :offset;"));
+
   q.bindValue(QSL(":offset"), amount_to_keep - 1);
   q.bindValue(QSL(":feed"), feed->customId());
 

src/librssguard/services/standard/parsers/jsonparser.cpp

@@ -123,6 +123,10 @@ QPair<StandardFeed*, QList<IconLocation>> JsonParser::guessFeed(const QByteArray
       throw FeedRecognizedButFailedException(QObject::tr("JSON error '%1'").arg(json_err.errorString()));
     }
 
+    if (!json.object().contains(QSL("version"))) {
+      throw ApplicationException(QObject::tr("not a JSON feed"));
+    }
+
     auto* feed = new StandardFeed();
     QList<IconLocation> icon_possible_locations;