Avoid panic

Author: raynaudoe

indexer/indexer.go

@@ -125,17 +125,18 @@ func (i *Indexer) addPendingHeights(p *[]uint64) error {
 }
 
 func (i *Indexer) onDBSyncComplete(r db_buffer.SyncResult) {
+	if r.SyncedHeights == nil {
+		zap.S().Errorf("onDBSyncComplete received nil SyncedHeights. Check db_sync code!")
+		return
+	}
+
 	if r.Error != nil {
 		zap.S().Errorf(r.Error.Error())
 		// Remove WIP heights
 		_ = tracker.UpdateInProgressHeight(false, r.SyncedHeights, i.Id, i.DbConn)
 		return
 	}
 
-	if r.SyncedHeights == nil {
-		return
-	}
-
 	err := tracker.UpdateAndRemoveWipHeights(r.SyncedHeights, i.Id, i.DbConn)
 	if err != nil {
 		return