Vetur: Vetur fail to start => vOnExp.body.map is not a function

[ondrej-janosik]

• [x] I have searched through existing issues
• [x] I have read through docs
• [x] I have read FAQ

Info

• Platform: Win
• Vetur version: 0.19.0
• VS Code version: 1.33.1

Problem

Vetur fail to start. Output: https://justpaste.it/6n1ik

Reproducible Case

[ktsn]

@ondrej-janosik Thanks for reporting this issue. Could you provide minimal reproduction which generate this error by cloning and editing https://github.com/octref/veturpack?

[ondrej-janosik]

Unfortunately, I can not. We found this bug in one pretty big project that I can not share with you. Can you help me where to look? I can send you just the broken .vue file. But I dont know how to find that one.

[ktsn]

No worries. I just figured out the cause.
If we have an arrow function in some v-on value, this error happens.

<template>
  <button @click="() => test = 123">click</button>
</template>

[dombavetta]

This started happening in my project as of yesterday. I stopped getting syntax highlighting for the script and style sections of one of my vue files. I lose all language support for the rest of my vue files too, syntax highlighting seems to be intact in all other vue files though.

Edit: removing all arrow functions from the template stopped the language server from crashing but the syntax highlighting is still broken. I also get a strange error when trying to use format strings within the template. "Cannot find name 'temthis'." for each instance. Note: I just removed and reinstalled vetur which is when this started happening.

[ktsn]

@dombavetta Syntax highlighting issue is probably a separated problem. Could you create a new issue for that with reproduction?

[ktsn]

Made a PR #1228

[dombavetta]

@ktsn Yeah I figured, I actually was just looking through the issues for users experiencing something similar and it appears theres already an issue created. I will try and get a reproducible project up but no promises, this comes from a very large project at work so I will try to strip out what I can and see if the issue is still present.

1211

[ktsn]

@dombavetta Thank you for your help!

[ktsn]

@dombavetta

"Cannot find name 'temthis'."

Oh, I missed this problem. This would be also individual problem. It would be appreciated if you create an issue for that also 🙏

[ondrej-janosik]

Thanks for such a quick help! You were right. When I delete all arrow functions in v-on, VETUR works as expected