Wrong `$ref` returning value type without initial value

:lady_beetle: bug scope: types

sxzz

Oct 5th 2022

Vue version

3.2.40

Link to minimal reproduction

https://www.typescriptlang.org/play?#code/JYWwDg9gTgLgBAbzlApgMzgXzmqERwDkAbgK4qECwAUKJLInACSoba75FkoD0IAhgGM8AZyrUaPHnAB20AQBtk6GoIgyR8NBAhwAvMrQAeTVGAyA5gD4AFAEpJ0uM7iAwakDwf3ABK6EzDOWcAA+cKQyACbo5ijhVjSq6iIQCigAdAoQFjbaEKnE-ArkqTAQAMr+5ll2DtRSLvX1Hs4A8gBGAFYogvDAInCQIiLArQoAnkRhkWjR4YSpNgBMAKwAzAs18bXSqEIwwMTAMOP+-BraUCAJGvCt-FD6zKx+Adb2jg1NPrv7KABqd8B+CMUM9KlY4ABacGbNQaZJpDJZW5QYplCqWew1OoND6eQAy5M4AHK6FBQPBQEQAGjgrVINzucF6oQiURkMTgp3CcAA7sAFEoUCBDhyZHBSeTGaKoGE9iAUO8cfUAKIADzAXXgpzFZOgAC44G1Ot1GX0BkMRuNCJNWTE5otVusaEA

Steps to reproduce

Open the reproduction

What is expected?

const bar = $ref<string>() bar is ReactiveVariable<string> | undefined

What is actually happening?

const bar = $ref<string>() bar is ReactiveVariable<string>

System Info

N/A

Any additional comments?

No response

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