From 9ba03b909554b57df34cde1a4c6160ed36d31f65 Mon Sep 17 00:00:00 2001
From: Simon Ser <contact@emersion.fr>
Date: Mon, 11 Jul 2022 11:25:19 +0200
Subject: [PATCH] upstream: ignore RPL_ENDOFWHO without pending command

---
 upstream.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/upstream.go b/upstream.go
index 3ed8b85..e0a61de 100644
--- a/upstream.go
+++ b/upstream.go
@@ -1429,8 +1429,10 @@ func (uc *upstreamConn) handleMessage(ctx context.Context, msg *irc.Message) err
 
 		dc, cmd := uc.dequeueCommand("WHO")
 		if cmd == nil {
-			return fmt.Errorf("unexpected RPL_ENDOFWHO: no matching pending WHO")
+			// Some servers send RPL_TRYAGAIN followed by RPL_ENDOFWHO
+			return nil
 		} else if dc == nil {
+			// Downstream connection is gone
 			return nil
 		}