From 444895b7dc2dca9d369be53b17f30fa2fb08eb40 Mon Sep 17 00:00:00 2001
From: devjiwonchoi <devjiwonchoi@gmail.com>
Date: Tue, 5 Nov 2024 18:32:44 +0900
Subject: [PATCH] wrap with guard block

Co-authored-by: Sebastian "Sebbie" Silbermann <sebastian.silbermann@vercel.com>
---
 packages/next/src/server/lib/lru-cache.ts | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/packages/next/src/server/lib/lru-cache.ts b/packages/next/src/server/lib/lru-cache.ts
index ef7abd722750c..18c6cde741c59 100644
--- a/packages/next/src/server/lib/lru-cache.ts
+++ b/packages/next/src/server/lib/lru-cache.ts
@@ -69,11 +69,13 @@ export class LRUCache<T> {
   }
 
   private evictLeastRecentlyUsed(): void {
-    const lruKey = this.cache.keys().next().value || ''
-    const lruSize = this.sizes.get(lruKey) || 0
-    this.totalSize -= lruSize
-    this.cache.delete(lruKey)
-    this.sizes.delete(lruKey)
+    const lruKey = this.cache.keys().next().value
+    if (lruKey !== undefined) {
+      const lruSize = this.sizes.get(lruKey) || 0
+      this.totalSize -= lruSize
+      this.cache.delete(lruKey)
+      this.sizes.delete(lruKey)
+    }
   }
 
   reset() {