Cannot assign to a NaN variable

[AndyChYL]

Version

2.7.0

Reproduction link

codepen.io

Steps to reproduce

data() {
return {
test: NaN
}
}

created(){
this.test = 10
console.log(this.test) // output:NaN
}

What is expected?

10

What is actually happening?

NaN

[deftliang]

maybe the Object.is polyfill function cause this case?