wrap with guard block

Co-authored-by: Sebastian "Sebbie" Silbermann <sebastian.silbermann@vercel.com>
vercel · Nov 5, 2024 · 444895b · 444895b
1 parent acd9aef
commit 444895b
Showing 1 changed file with 7 additions and 5 deletions.
diff --git 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() {