From faba28c7c3c55124f8be117cfee9d75b33ec1c7c Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor@ccxvii.net>
Date: Sun, 2 Jan 2022 19:55:49 +0100
Subject: Stable undo.

---
 rules.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/rules.js b/rules.js
index 09f5a11..85c9861 100644
--- a/rules.js
+++ b/rules.js
@@ -78,7 +78,7 @@ function clear_undo() {
 
 function push_undo() {
 	game.undo.push(JSON.stringify(game, (k,v) => {
-		if (k === 'undo') return undefined;
+		if (k === 'undo') return 0;
 		if (k === 'log') return v.length;
 		return v;
 	}));
@@ -87,7 +87,7 @@ function push_undo() {
 function pop_undo() {
 	let undo = game.undo;
 	let save_log = game.log;
-	Object.assign(game, JSON.parse(undo.pop()));
+	game = JSON.parse(undo.pop());
 	game.undo = undo;
 	save_log.length = game.log;
 	game.log = save_log;
-- 
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