From aec281e6389ab6e95a2bee073aabacf00139db4a Mon Sep 17 00:00:00 2001
From: Josh Bleecher Snyder <josh@tailscale.com>
Date: Wed, 10 Nov 2021 14:05:38 -0800
Subject: [PATCH] wgengine/magicsock: call peerMap.validate at the end of
 SetNetworkMap

Not for prod, maybe useful for debugging.
---
 wgengine/magicsock/magicsock.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/wgengine/magicsock/magicsock.go b/wgengine/magicsock/magicsock.go
index cdb712007..db35e8197 100644
--- a/wgengine/magicsock/magicsock.go
+++ b/wgengine/magicsock/magicsock.go
@@ -2264,6 +2264,11 @@ func nodesEqual(x, y []*tailcfg.Node) bool {
 func (c *Conn) SetNetworkMap(nm *netmap.NetworkMap) {
 	c.mu.Lock()
 	defer c.mu.Unlock()
+	defer func() {
+		if err := c.peerMap.validate(); err != nil {
+			panic(err)
+		}
+	}()
 
 	if c.closed {
 		return