be careful when reading elastic response

src/elastic/list.go

@@ -46,11 +46,15 @@ func getPathsFromIndex() (map[string]string, map[string]string, error) {
 	}
 
 	for {
-		scrollID := r["_scroll_id"].(string)
-		hits := r["hits"].(map[string]interface{})["hits"].([]interface{})
+		scrollID, ok := r["_scroll_id"].(string)
+		if !ok {
+			// No more pages to scroll through
+			break
+		}
 
-		// Break after no more documents
+		hits := r["hits"].(map[string]interface{})["hits"].([]interface{})
 		if len(hits) == 0 {
+			// Break after no more documents
 			break
 		}