Prevent index out of range

app/src/main/java/eu/faircode/email/FragmentMessages.java

@@ -10292,8 +10292,11 @@ public class FragmentMessages extends FragmentBase
                     return null;
 
                 ICalendar icalendar = CalendarHelper.parse(context, calendar.getFile(context));
-                VEvent event = icalendar.getEvents().get(0);
+                List<VEvent> events = icalendar.getEvents();
+                if (events == null || events.size() == 0)
+                    return null;
 
+                VEvent event = events.get(0);
                 int status = CalendarContract.Events.STATUS_TENTATIVE;
                 if (event.getStatus() != null &&
                         Status.CONFIRMED.equals(event.getStatus().getValue()))

app/src/main/java/eu/faircode/email/MessageHelper.java

@@ -4461,10 +4461,14 @@ public class MessageHelper {
                 File file = local.getFile(context);
                 ICalendar icalendar = CalendarHelper.parse(context, file);
 
-                Method method = icalendar.getMethod();
-                VEvent event = icalendar.getEvents().get(0);
+                List<VEvent> events = icalendar.getEvents();
+                if (events == null || events.size() == 0)
+                    EntityLog.log(context, "No events");
+                else {
+                    VEvent event = events.get(0);
 
                     // https://www.rfc-editor.org/rfc/rfc5546#section-3.2
+                    Method method = icalendar.getMethod();
                     if (method != null && method.isCancel())
                         CalendarHelper.delete(context, event, message);
                     else if (method == null || method.isRequest()) {
@@ -4475,6 +4479,7 @@ public class MessageHelper {
                             EntityLog.log(context, "Tentative event not stored");
                     } else
                         EntityLog.log(context, "Unknown event method=" + method.getValue());
+                }
             } catch (Throwable ex) {
                 Log.w(ex);
                 db.attachment().setWarning(local.id, Log.formatThrowable(ex));