message: fix(core/scope): don't install plugins if not initialized
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diff: @@ -156,6 +156,10 @@ export default class Scope {
  }
  usePlugin (plugin: Plugin, options?: { [key: string]: any }) {
  + if (!this.isInitialized) {
  + return this
  + }
  +
  if (this.pluginIsInstalled(plugin)) {
  return this
  }
  