fix(runtime-core): fix dev fragment root flag check

diff --git a/packages/runtime-core/src/renderer.ts b/packages/runtime-core/src/renderer.ts
index 5122e7a9131a5b24ff741788d9cdaa47818e2cd3..15f86faa438e3d2ab4c35d58a3980006c5f60056 100644 (file)
--- a/packages/runtime-core/src/renderer.ts
+++ b/packages/runtime-core/src/renderer.ts
@@ -848,7 +848,11 @@ function baseCreateRenderer(
     }
     if (parentComponent) {
       let subTree = parentComponent.subTree
-      if (__DEV__ && subTree.patchFlag & PatchFlags.DEV_ROOT_FRAGMENT) {
+      if (
+        __DEV__ &&
+        subTree.patchFlag > 0 &&
+        subTree.patchFlag & PatchFlags.DEV_ROOT_FRAGMENT
+      ) {
         subTree =
           filterSingleRoot(subTree.children as VNodeArrayChildren) || subTree
       }