From ce13a71673f42941dc02feafcde8775caefc0b54 Mon Sep 17 00:00:00 2001
From: Bill Collins <bill.collins@hp.com>
Date: Tue, 21 Jan 2025 15:03:32 +0000
Subject: [PATCH] Fix missing type on module boundary

---
 packages/vitest/package.json          | 4 ++++
 packages/vitest/src/utils/debugger.ts | 3 ++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/packages/vitest/package.json b/packages/vitest/package.json
index 532352e5dadf..9b66f56afd78 100644
--- a/packages/vitest/package.json
+++ b/packages/vitest/package.json
@@ -123,6 +123,7 @@
   },
   "peerDependencies": {
     "@edge-runtime/vm": "*",
+    "@types/debug": "^4.1.12",
     "@types/node": "^18.0.0 || ^20.0.0 || >=22.0.0",
     "@vitest/browser": "workspace:*",
     "@vitest/ui": "workspace:*",
@@ -133,6 +134,9 @@
     "@edge-runtime/vm": {
       "optional": true
     },
+    "@types/debug": {
+      "optional": true
+    },
     "@types/node": {
       "optional": true
     },
diff --git a/packages/vitest/src/utils/debugger.ts b/packages/vitest/src/utils/debugger.ts
index 473030ff57ce..2defeed44584 100644
--- a/packages/vitest/src/utils/debugger.ts
+++ b/packages/vitest/src/utils/debugger.ts
@@ -1,6 +1,7 @@
+import type { Debugger } from 'debug'
 import createDebug from 'debug'
 
-export function createDebugger(namespace: `vitest:${string}`) {
+export function createDebugger(namespace: `vitest:${string}`): Debugger | undefined {
   const debug = createDebug(namespace)
   if (debug.enabled) {
     return debug