fix(compiler-core): update

Author: baiwusanyu-c

packages/runtime-core/src/renderer.ts

@@ -796,7 +796,6 @@ function baseCreateRenderer(
   ) => {
     const el = (n2.el = n1.el!)
     let { patchFlag, dynamicChildren, dirs } = n2
-    let { dynamicChildren: prevDynamicChildren } = n1
     // #1426 take the old vnode's patch flag into account since user may clone a
     // compiler-generated vnode, which de-opts to FULL_PROPS
     patchFlag |= n1.patchFlag & PatchFlags.FULL_PROPS
@@ -814,13 +813,7 @@ function baseCreateRenderer(
     }
     parentComponent && toggleRecurse(parentComponent, true)
 
-    if (
-      (__DEV__ && isHmrUpdating) ||
-      (dynamicChildren &&
-        prevDynamicChildren &&
-        dynamicChildren.length === 0 &&
-        prevDynamicChildren.length === 0)
-    ) {
+    if (__DEV__ && isHmrUpdating) {
       // HMR updated, force full diff
       patchFlag = 0
       optimized = false