From a550bf07ac0e9b829859871ef667e34fa6e271a8 Mon Sep 17 00:00:00 2001
From: Brian Stephan <brian.stephan@tdstelecom.com>
Date: Thu, 6 May 2021 09:29:26 -0500
Subject: [PATCH] discard from set to ignore KeyError

---
 history/ircplugin.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/history/ircplugin.py b/history/ircplugin.py
index 619103b..3fbb6bd 100644
--- a/history/ircplugin.py
+++ b/history/ircplugin.py
@@ -152,7 +152,7 @@ class History(Plugin):
     def _remove_channel_participant(self, where, who):
         """Remove the specified who from the where channel's participants list."""
         participants = self.channel_participants.setdefault(where, set())
-        participants.remove(who)
+        participants.discard(who)
         logger.debug("participants for %s: %s", where, participants)