Infinite loop when linting Vue file containing TypeScript keyword

[MatthiasKunnen]

The @typescript-eslint/parser is stuck in an infinite loop when it encounters the words static class in the attributes of an element in a template of another file. Yes, this bug is weird.

Reproduction
https://github.com/MatthiasKunnen/eslint-vue-ts-keyword

Examples of failing code:

<template>
    <div style="display: none"
         static
         class=""
    >
    </div>
</template>

<template>
  <div data-test="
        static
        class">
  </div>
</template>

Result
Eslint crashes with FATAL ERROR: invalid array length Allocation failed - JavaScript heap out of memory.
Error log

Please check the reproduction repo for a more in-depth explanation and examples.

If I had to guess, the problem is that typescript-estree:createWatchProgram parses all files that are mentioned in the tsconfig's include property which makes it attempt to parse the tags which causes the infinite loop. This despite the parser being set to <template>: espree in the ESLint config. Now the question is if this can be avoided.

[ota-meshi]

Thank you for posting this issue.
I have debugged in your repository and it looks like typescript is hanging trying to parse the contents of hang-cause.vue as .ts.

I probably can't solve this problem.
Can you open the problem in the typescript-eslint repository as well?

Also trying to lint by renaming hang-cause.vue to hang-cause.ts using @typescript-eslint/parser without vue-eslint-parser can also hang processing.

[ota-meshi]

It seems that it can also be hung by processing a ts file with the following content:

""
static
class

[ota-meshi]

Hmm. This may be a typescript bug. If you have this file, tsc will not finish processing.

[MatthiasKunnen]

I'm not familiar with the inner workings of ESLint but I assume it is not possible to only feed the code in <script lang="ts"> tags to @typescript/eslint-parser and have it not parse the whole file?

[ota-meshi]

I'm not familiar with the internal processing of ts-eslint, so I'm not sure.

[ota-meshi]

If you want this issue resolved, open the issue in the TypeScript repository.
I think the following code should be used for the reproduction code described in the TypsScript issue.

""
static
class

I close this issue because there is nothing I can do with this repository.