From 9db3cbbfc1a072675a8d0e53edf3869af115dc60 Mon Sep 17 00:00:00 2001
From: Guillaume Chau <guillaume.b.chau@gmail.com>
Date: Thu, 6 May 2021 14:21:54 +0200
Subject: [PATCH] fix(hmr): don't remove __file key from component type

---
 packages/runtime-core/src/hmr.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/runtime-core/src/hmr.ts b/packages/runtime-core/src/hmr.ts
index d2a109a04b..f4c46110d5 100644
--- a/packages/runtime-core/src/hmr.ts
+++ b/packages/runtime-core/src/hmr.ts
@@ -116,7 +116,7 @@ function reload(id: string, newComp: ComponentOptions | ClassComponent) {
     newComp = isClassComponent(newComp) ? newComp.__vccOpts : newComp
     extend(component, newComp)
     for (const key in component) {
-      if (!(key in newComp)) {
+      if (key !== '__file' && !(key in newComp)) {
         delete (component as any)[key]
       }
     }
-- 
2.47.3