From 347a8798a4c5f0b426f3ac84a01d752d823fb51b Mon Sep 17 00:00:00 2001
From: HcySunYang <HcySunYang@outlook.com>
Date: Sat, 6 Feb 2021 02:54:59 +0800
Subject: [PATCH] fix(runtime-core): check the DEV_ROOT_FRAGMENT flag correctly
 in the dev environment (#2750)

---
 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)
     }