message: fix ssr initial context style recording
diff: -import { isObject } from 'shared/util'
  +import { isPlainObject } from 'shared/util'
  const vm = require('vm')
  const path = require('path')
  @@ -73,7 +73,7 @@ function compileModule (files, basedir) {
  }
  function deepClone (val) {
  - if (isObject(val)) {
  + if (isPlainObject(val)) {
  const res = {}
  for (const key in val) {
  res[key] = deepClone(val[key])
  @@ -108,14 +108,13 @@ export function createBundleRunner (entry, files, basedir, runInNewContext) {
  const initialContext = {}
  const sharedContext = createContext(initialContext)
  - // On subsequent renders, __VUE_SSR_CONTEXT__ will not be avaialbe
  - // to prevent cross-request pollution.
  - delete sharedContext.__VUE_SSR_CONTEXT__
  -
  let runner // lazy creation so that errors can be caught by user
  return (userContext = {}) => new Promise(resolve => {
  if (!runner) {
  runner = evaluate(entry, sharedContext)
  + // On subsequent renders, __VUE_SSR_CONTEXT__ will not be avaialbe
  + // to prevent cross-request pollution.
  + delete sharedContext.__VUE_SSR_CONTEXT__
  if (typeof runner !== 'function') {
  throw new Error(
  'bundle export should be a function when using ' +
  