Should not use vue inner util, after upgrade everything doesn't worked

[lijing666]

latest version of vue-demi added var warn = Vue.util.warn cause all old webpack build doesn't worked

import Vue from 'vue'

var isVue2 = true
var isVue3 = false
var Vue2 = Vue
var warn = Vue.util.warn

this error is Vue.util is undefined

[zbjcool]

It happened to me too

[lijing666]

It happened to me too

The problem is because old webpack var Vue = require('vue') is not Vue.default but Vue itself ，so Vue.util is undefined and Vue.default.util is defined

[antfu]

/cc @posva

[cyaque]

Same for me, crashed a release of a nuxt 2 project on my side.

[posva]

Does anybody has a boiled down repro? I don't see why Vue.util wouldn't work while Vue.config does

In https://github.com/posva/old-cli-vue-router it uses the esm version and it works fine

[cyaque]

It is not vue.util, it is vue.warn that crashes. Im in the middle of 4 releases, and patching this projects through, so I can't do much right now sorry.

[posva]

It's Vue.util.warn and fails at Vue.util. The screenshots suggest it should be Vue.default.util.warn but then everything also in this file also needs to be changed. I will take a look once it can be reproduced. I couldn't reproduce on a nuxt 2 project either: https://github.com/piniajs/example-nuxt-2

[cyaque]

Apologies, didn't check carefully. I've solved it by forcing a specific version (downgrade to 13.8).

I'm sharing my package json, hope it helps for the repro steps.
package.json.txt

[TouchSek]

Yes, the same issue on 0.13.9 or 0.13.10. after nuxt generate.

[TouchSek]

It's Vue.util.warn and fails at Vue.util. The screenshots suggest it should be Vue.default.util.warn but then everything also in this file also needs to be changed. I will take a look once it can be reproduced. I couldn't reproduce on a nuxt 2 project either: https://github.com/piniajs/example-nuxt-2

@posva you have build or generate the project, next you have to start the project in your local yarn start and you will see the error.