From 4433cc0f15b7e4e027da12949da33fe1975555bc Mon Sep 17 00:00:00 2001
From: Hubert Hirtz <hubert@hirtz.pm>
Date: Tue, 2 Nov 2021 20:37:46 +0100
Subject: Ensure BATCH's first arg is not empty

---
 irc/session.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'irc/session.go')

diff --git a/irc/session.go b/irc/session.go
index 201f50c..139e90e 100644
--- a/irc/session.go
+++ b/irc/session.go
@@ -973,8 +973,11 @@ func (s *Session) handleRegistered(msg Message) (Event, error) {
 		if err := msg.ParseParams(&id); err != nil {
 			return nil, err
 		}
+		if len(id) == 0 {
+			return nil, fmt.Errorf("empty batch id")
+		}
 
-		batchStart := id[0] == '+' // id is not empty since it's not a trailing param
+		batchStart := id[0] == '+'
 		id = id[1:]
 
 		if batchStart {
-- 
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