'loc' of null error when using babel-eslint as a custom parser

• Node Version: 8.9.1
• eslint Version: 4.10.0
• vue-eslint-parser Version: 2.0.1-beta.2
• babel-eslint Version: 8.0.2

This is directly related to the issue I created here https://github.com/vuejs/eslint-plugin-vue/issues/189.

I have discovered that the above issue is not resident in eslint-plugin-vue and that the issue likely lies with the interactions between babel-eslint and vue-eslint-parser.

As described in https://github.com/vuejs/eslint-plugin-vue/issues/189 the combination of vue-eslint-parser and babel-eslint produces a error when running the linter.

Example

[mysticatea]

Yes. This happens when a code is using stage 0-3 syntaxes or type annotations. I’m working on this, but I need more time.

The cause is that vue-eslint-parser does not get the monkey patching of babel-eslint. The monkey patching affects to ESLint core, but does not to this parser. I’m working to remove the monkey patching on the new feature of ESLint core.

[mysticatea]

eslint@4.14.0 has been released. It includes the enhancement and I removed the monkeypatch from babel-eslint. I’ll advance to fix this issue.