TypeScript: eslint --fix command crash the code due to the prefer-object-spread rule

[kurone-kito]

Tell us about your environment

• ESLint Version: v6.8.0
• Node Version: v13.11.0
• npm Version: v6.14.2

What parser (default, Babel-ESLint, etc.) are you using?

@typescript-eslint/parser

Please show your full configuration:

Configuration

env:
  browser: true
  es6: true
  node: true
extends:
  - eslint:recommended
  - airbnb-base
  - plugin:@typescript-eslint/recommended
  - plugin:@typescript-eslint/eslint-recommended
  - prettier
  - plugin:prettier/recommended
  - prettier/@typescript-eslint
globals:
  Atomics: readonly
  SharedArrayBuffer: readonly
parser: '@typescript-eslint/parser'
parserOptions:
  ecmaVersion: 2020
  sourceType: module
plugins:
  - '@typescript-eslint'
  - import
  - prettier
root: true
rules:
  '@typescript-eslint/explicit-function-return-type':
    - 'off' # Because type inference cannot be used :(

What did you do? Please include the actual source code causing the issue, as well as the command that you used to run ESLint.

const getObject = () => ({ huge: ['sized'], dynamic: ['object'] });

const obj = Object.assign<{}, Record<string, string[]>>({}, getObject());
console.log(obj);

eslint --fix ./*.ts

What did you expect to happen?

I expected the fix to occur as below:

const getObject = () => ({ huge: ['sized'], dynamic: ['object'] });

const obj = { ...getObject() };
console.log(obj);

What actually happened? Please include the actual, raw output from ESLint.

Actual output code:

const getObject = () => ({ huge: ['sized'], dynamic: ['object'] });

const obj = <{}, Record<string, string[]>>{ ...getObject()};
console.log(obj);

This repository can reproduce the above problem: kurone-kito/example-for-eslint-POS

Are you willing to submit a pull request to fix this bug?

Probably no, because I don't know the cause.

[kaicataldo]

Thanks for making this issue. I think it's definitely worth exploring if we can change the rule in a generic way to avoid crashing on this syntax, if possible.