Added nil check to deserializeinfo

thread.go

@@ -366,15 +366,18 @@ func RestoreSimpleThread(ctx *Context, thread Thread, j SimpleThreadJSON, nodes
       return fmt.Errorf("%+v is not a Thread as expected", child_node)
     }
 
+    var parsed_info ThreadInfo
+    if info_raw != nil {
       info_ser, err := json.Marshal(info_raw)
       if err != nil {
         return err
       }
 
-    parsed_info, err := thread.DeserializeInfo(ctx, info_ser)
+      parsed_info, err = thread.DeserializeInfo(ctx, info_ser)
       if err != nil {
         return err
       }
+    }
 
     thread.AddChild(child_t, parsed_info)
   }