●  Cannot log after tests are done. Did you forget to wait for something async in your test?
    Attempted to log "[Vue warn]: Error in config.errorHandler: "TypeError: Cannot set property '_error' of undefined"".

      at BufferedConsole.error (node_modules/@jest/console/build/BufferedConsole.js:165:10)
      at warn (node_modules/vue/dist/vue.runtime.common.dev.js:621:15)
      at logError (node_modules/vue/dist/vue.runtime.common.dev.js:1880:5)
      at globalHandleError (node_modules/vue/dist/vue.runtime.common.dev.js:1871:9)
      at handleError (node_modules/vue/dist/vue.runtime.common.dev.js:1835:5)
      at Array.<anonymous> (node_modules/vue/dist/vue.runtime.common.dev.js:1978:9)
      at flushCallbacks (node_modules/vue/dist/vue.runtime.common.dev.js:1902:14)

export function nextTick (cb?: Function, ctx?: Object) {
  let _resolve
  callbacks.push(() => {
    if (cb) {
      try {
        cb.call(ctx)
      } catch (e) {
        handleError(e, ctx, 'nextTick')
      }
// ...

export function handleError (err: Error, vm: any, info: string) {
  // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
  // See: https://github.com/vuejs/vuex/issues/1505
  pushTarget()
  try {
    if (vm) {
      let cur = vm
      while ((cur = cur.$parent)) {
        const hooks = cur.$options.errorCaptured
        if (hooks) {
          for (let i = 0; i < hooks.length; i++) {
            try {
              const capture = hooks[i].call(cur, err, vm, info) === false
              if (capture) return
            } catch (e) {
              globalHandleError(e, cur, 'errorCaptured hook')
            }
          }
        }
      }
    }
    globalHandleError(err, vm, info)
//...

function errorHandler(errorOrString, vm) {
  const error =
    typeof errorOrString === 'object' ? errorOrString : new Error(errorOrString)

  vm._error = error
  throw error
}