From 7282ec528617341defb7943d68431f1bc5d17369 Mon Sep 17 00:00:00 2001
From: Cameron Fischer <fischer.cameron@gmail.com>
Date: Fri, 10 Sep 2021 16:17:35 -0400
Subject: [PATCH] Fix getCacheForTiddler to cache falsy values (#5413)

* getCacheForTiddler can cache falsy values

* Switch to "!== undefined" for getCacheForTiddler
---
 core/modules/wiki.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/modules/wiki.js b/core/modules/wiki.js
index 5dd772f44..dc9a12aad 100755
--- a/core/modules/wiki.js
+++ b/core/modules/wiki.js
@@ -844,7 +844,7 @@ exports.clearGlobalCache = function() {
 exports.getCacheForTiddler = function(title,cacheName,initializer) {
 	this.caches = this.caches || Object.create(null);
 	var caches = this.caches[title];
-	if(caches && caches[cacheName]) {
+	if(caches && caches[cacheName] !== undefined) {
 		return caches[cacheName];
 	} else {
 		if(!caches) {