The cli-plugin-eslint need upgrade babel-eslint to ^10 and eslint to ^5

[luxueyan]

Version

3.0.5

Node and OS info

node v8.10.0 / yarn 1.9.4 / macos 10.12.6

Steps to reproduce

when using nullish-coalescing-operator in code, vue-cli-service lint throw error because of eslint

this.empty2 ?? 'empty2'

What is expected?

Expected eslint run ok

What is actually happening?

Error: unreachable
at CodePathState.popChoiceContext (/Users/luxueyan/bitmain/data-tag-frontend/node_modules/@vue/cli-plugin-eslint/node_modules/eslint/lib/code-path-analysis/code-path-state.js:444:23)
at processCodePathToExit (/Users/luxueyan/bitmain/data-tag-frontend/node_modules/@vue/cli-plugin-eslint/node_modules/eslint/lib/code-path-analysis/code-path-analyzer.js:434:19)

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Upgrade eslint (babel-eslint) version is ok

[LinusBorg]

I'm not aware of this operator, can you link to some info? google didn't help.

[luxueyan]

https://babeljs.io/docs/en/babel-plugin-proposal-nullish-coalescing-operator

[LinusBorg]

...and you have added that proposal to your babel config?

[luxueyan]

Yes! But it throws error yet. When I update the eslint and babel-elint to latest in the cli-plugin-eslint package, it works!