diff --git a/lib/entry-points.js b/lib/entry-points.js
index aff18c1a4..348e213bd 100644
--- a/lib/entry-points.js
+++ b/lib/entry-points.js
@@ -149955,6 +149955,7 @@ function getCachedCommandOutput(key, cmd, validate) {
   }
   const entry = readCommandCacheFile()[key];
   if (!isObject(entry) || !isString(entry.cmd) || cmd !== void 0 && entry.cmd !== cmd || validate !== void 0 && !validate(entry.output)) {
+    logger.warning("Received invalid data from the command-cache file.");
     return void 0;
   }
   cacheCommandOutput(key, entry.cmd, entry.output);
diff --git a/src/cache.ts b/src/cache.ts
index df8b69d8b..7ec0d6851 100644
--- a/src/cache.ts
+++ b/src/cache.ts
@@ -121,6 +121,7 @@ export function getCachedCommandOutput<T>(
     (cmd !== undefined && entry.cmd !== cmd) ||
     (validate !== undefined && !validate(entry.output))
   ) {
+    logger.warning("Received invalid data from the command-cache file.");
     return undefined;
   }