From a91e6fa0dbdc1c336c497a94c78d386ca21fcd01 Mon Sep 17 00:00:00 2001
From: Pooya Parsa <pooya@pi0.ir>
Date: Sat, 24 Mar 2018 12:22:49 +0430
Subject: [PATCH] fix(builder): graceful unwatch when devMiddleware is not
 initialized

---
 lib/builder/builder.mjs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/builder/builder.mjs b/lib/builder/builder.mjs
index e64d86ae46..c0a327b039 100644
--- a/lib/builder/builder.mjs
+++ b/lib/builder/builder.mjs
@@ -648,7 +648,9 @@ export default class Builder {
     this.compilersWatching.forEach(watching => watching.close())
 
     // Stop webpack middleware
-    await this.webpackDevMiddleware.close()
+    if (this.webpackDevMiddleware) {
+      await this.webpackDevMiddleware.close()
+    }
   }
 
   // TODO: remove ignore when generateConfig enabled again