--- a/src/eric7/Network/IRC/IrcWidget.py	Sun Jan 21 12:53:23 2024 +0100
+++ b/src/eric7/Network/IRC/IrcWidget.py	Sun Jan 21 13:00:42 2024 +0100
@@ -469,7 +469,7 @@
         @param name name of the closed channel
         @type str
         """
-        for channel in self.__channelList:
+        for channel in self.__channelList[:]:
             if channel.name() == name:
                 self.channelsWidget.removeTab(self.channelsWidget.indexOf(channel))
                 self.__channelList.remove(channel)