Page transition _leaveCb error

[cliqer]

Describe the bug

Using latest vite, vue-router and vuex with transition gives:

TypeError: Cannot read property '_leaveCb' of null

Maybe it is a vue-router bug or I am doing something wrong.
Some help please.

Reproduction

https://codesandbox.io/s/fancy-shadow-04mrv?file=/package.json

System Info

• required vite version: 1.0.0-beta.8
• required Operating System: Windows 10 LTSC
• required Node version: 14.4.0
• Optional:
  • npm/yarn version:
    6.14.5 / 1.22.4
  • Installed vue version (from yarn.lock or package-lock.json)
    3.0.0-beta.16
  • Installed @vue/compiler-sfc version
    ^3.0.0-beta.16

1. Run vite or vite build with the --debug flag.

vite v1.0.0-beta.8
  vite:config env mode: development +0ms
  vite:config env: {} +2ms
  vite:optimize Hash is consistent. Skipping. Use --force to override. +0ms
Port 3000 is in use, trying another one...
  vite:optimize Hash is consistent. Skipping. Use --force to override. +105ms

  Dev server running at:
  > Network:  http://10.0.1.3:3001/
  > Local:    http://localhost:3001/

  vite:server server ready in 351ms. +0ms

vite v1.0.0-beta.8
  vite:config env mode: production +0ms
  vite:config env: {} +1ms
Building for production...
[write] dist\_assets\index.2ffa22c9.js 74.65kb, brotli: 25.24kb
[write] dist\_assets\style.3b64d8ed.css 0.23kb, brotli: 0.09kb
[write] dist\index.html 0.66kb, brotli: 0.27kb
Build completed in 3.67s.

2. Provide the error log here.

TypeError: Cannot read property '_leaveCb' of null
    at Object.beforeEnter (https://04mrv.sse.codesandbox.io/@modules/vue.js:5176:33)
    at mountElement (https://04mrv.sse.codesandbox.io/@modules/vue.js:4020:28)
    at processElement (https://04mrv.sse.codesandbox.io/@modules/vue.js:3967:13)
    at patch (https://04mrv.sse.codesandbox.io/@modules/vue.js:3880:21)
    at componentEffect (https://04mrv.sse.codesandbox.io/@modules/vue.js:4343:21)
    at reactiveEffect (https://04mrv.sse.codesandbox.io/@modules/vue.js:295:24)
    at effect (https://04mrv.sse.codesandbox.io/@modules/vue.js:270:9)
    at setupRenderEffect (https://04mrv.sse.codesandbox.io/@modules/vue.js:4309:27)
    at mountComponent (https://04mrv.sse.codesandbox.io/@modules/vue.js:4267:9)
    at processComponent (https://04mrv.sse.codesandbox.io/@modules/vue.js:4223:17)

[yyx990803]

Likely a vue-router + vue 3 issue, either way this is not related to Vite. I'd suggest opening the issue in vue-router's repo instead.