fix: init _staticTrees to avoid runtime reference warning

fix #7075
vuejs · Nov 17, 2017 · f5cd29e · f5cd29e
1 parent 1e14603
commit f5cd29e
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diff --git a/flow/component.js b/flow/component.js
@@ -66,6 +66,7 @@ declare interface Component {
   _isDestroyed: boolean;
   _isBeingDestroyed: boolean;
   _vnode: ?VNode; // self root node
+  _staticTrees: ?Array<VNode>; // v-once cached trees
   _hasHookEvent: boolean;
   _provided: ?Object;
 

diff --git a/src/core/instance/render.js b/src/core/instance/render.js
@@ -17,6 +17,7 @@ import { isUpdatingChildComponent } from './lifecycle'
 
 export function initRender (vm: Component) {
   vm._vnode = null // the root of the child tree
+  vm._staticTrees = null // v-once cached trees
   const options = vm.$options
   const parentVnode = vm.$vnode = options._parentVnode // the placeholder node in parent tree
   const renderContext = parentVnode && parentVnode.context