From 69ed6646f1cc2d2386047cd5a37daf52b97e4933 Mon Sep 17 00:00:00 2001
From: Jay Wren <jay.wren@slack-corp.com>
Date: Wed, 10 Dec 2025 16:56:06 -0500
Subject: [PATCH] dont call writeTo4 if writing to ipv6

---
 udp/udp_linux.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/udp/udp_linux.go b/udp/udp_linux.go
index e775932..9ba9c34 100644
--- a/udp/udp_linux.go
+++ b/udp/udp_linux.go
@@ -192,7 +192,7 @@ func (u *StdConn) ReadMulti(msgs []rawMessage) (int, error) {
 }
 
 func (u *StdConn) WriteTo(b []byte, ip netip.AddrPort) error {
-	if u.isV4 {
+	if u.isV4 && ip.Addr().Is4() {
 		return u.writeTo4(b, ip)
 	}
 	return u.writeTo6(b, ip)