From fb07741531414a7c84bfadc0e8320939076f235c Mon Sep 17 00:00:00 2001
From: fazledyn-or <ataf@openrefactory.com>
Date: Tue, 22 Aug 2023 23:07:50 +0600
Subject: [PATCH] Fixed error at `NamedElementOnion` at datastructures.py

---
 web3/datastructures.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/web3/datastructures.py b/web3/datastructures.py
index 670ad16bef..13b232d393 100644
--- a/web3/datastructures.py
+++ b/web3/datastructures.py
@@ -263,6 +263,8 @@ def __add__(self, other: Any) -> "NamedElementOnion[TKey, TValue]":
         if not isinstance(other, NamedElementOnion):
             # you can only combine with another ``NamedElementOnion``
             return NotImplemented
+        combined = self._queue.copy()
+        combined.update(other._queue)
         return NamedElementOnion(cast(List[Any], combined.items()))
 
     def __contains__(self, element: Any) -> bool: