From 4aadfcc38b74712473166f0e85d8114df852edf6 Mon Sep 17 00:00:00 2001
From: HcySunYang <HcySunYang@outlook.com>
Date: Mon, 7 Dec 2020 16:14:17 +0800
Subject: [PATCH] fix(runtime-core): check the DEV_ROOT_FRAGMENT flag correctly
 in the dev environment

---
 packages/runtime-core/src/componentRenderUtils.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/runtime-core/src/componentRenderUtils.ts b/packages/runtime-core/src/componentRenderUtils.ts
index 44e6c8dcf91..c1454e96c1e 100644
--- a/packages/runtime-core/src/componentRenderUtils.ts
+++ b/packages/runtime-core/src/componentRenderUtils.ts
@@ -119,7 +119,11 @@ export function renderComponentRoot(
     // to have comments along side the root element which makes it a fragment
     let root = result
     let setRoot: ((root: VNode) => void) | undefined = undefined
-    if (__DEV__ && result.patchFlag & PatchFlags.DEV_ROOT_FRAGMENT) {
+    if (
+      __DEV__ &&
+      result.patchFlag > 0 &&
+      result.patchFlag & PatchFlags.DEV_ROOT_FRAGMENT
+    ) {
       ;[root, setRoot] = getChildRoot(result)
     }