--- a/eric6/WebBrowser/AdBlock/AdBlockSearchTree.py	Thu Apr 08 17:27:12 2021 +0200
+++ b/eric6/WebBrowser/AdBlock/AdBlockSearchTree.py	Thu Apr 08 18:27:47 2021 +0200
@@ -108,7 +108,7 @@
         if not node:
             return
         
-        for key in node.children.keys():
+        for key in node.children:
             self.__deleteNode(node.children[key])
         
         node.children = {}