From 09141b56fd948229b02b422cebab39f02102bf38 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Tue, 13 Aug 2019 11:30:28 -0400
Subject: [PATCH] wip: proper handling of value assignment in reactive object

---
 packages/reactivity/src/baseHandlers.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/reactivity/src/baseHandlers.ts b/packages/reactivity/src/baseHandlers.ts
index cdb9f7b1d0..eaa2b1ed0d 100644
--- a/packages/reactivity/src/baseHandlers.ts
+++ b/packages/reactivity/src/baseHandlers.ts
@@ -42,7 +42,7 @@ function set(
   value = toRaw(value)
   const hadKey = hasOwnProperty.call(target, key)
   const oldValue = target[key]
-  if (isValue(oldValue)) {
+  if (isValue(oldValue) && !isValue(value)) {
     oldValue.value = value
     return true
   }
-- 
2.47.3