From 55c12f664219d46dfe54180ee4ccd2aadb4abf5e Mon Sep 17 00:00:00 2001
From: Gareth Jones <jones258@gmail.com>
Date: Mon, 16 Sep 2024 07:12:18 +1200
Subject: [PATCH] fix(utils): export map cache is tainted by unreliable parse
 results

---
 src/exportMap/builder.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/exportMap/builder.js b/src/exportMap/builder.js
index 5348dba37..f7b9006ef 100644
--- a/src/exportMap/builder.js
+++ b/src/exportMap/builder.js
@@ -92,7 +92,11 @@ export default class ExportMapBuilder {
 
     exportMap.mtime = stats.mtime;
 
-    exportCache.set(cacheKey, exportMap);
+    // If the visitor keys were not populated, then we shouldn't save anything to the cache,
+    // since the parse results may not be reliable.
+    if (exportMap.visitorKeys) {
+      exportCache.set(cacheKey, exportMap);
+    }
     return exportMap;
   }