[no-unused-vars] False positive: export with in keyof

[OriginLive]

• I have tried restarting my IDE and the issue persists.
• I have updated to the latest version of the packages.
• I have read the FAQ and my problem is not listed.

Repro

// file 1

export type FieldDefinition = {
  [key: string]: string[];
};

// file 2

interface FruitsFormDefinition {
  apple: string;
  orange: string;
}

export type FruitsFieldDefinition = { [K in keyof FruitsFormDefinition]: FieldDefinition[string] };

export const fruitsFieldDefiniton: FruitsFieldDefinition = {
  apple: [],
  orange: ['isRequired'],
};

tsconfig:

{
  "compilerOptions": {
    "target": "es5",
    "lib": [
      "dom",
      "dom.iterable",
      "esnext"
    ],
    "allowJs": false,
    "skipLibCheck": false,
    "esModuleInterop": true,
    "allowSyntheticDefaultImports": true,
    "strict": true,
    "forceConsistentCasingInFileNames": true,
    "module": "esnext",
    "moduleResolution": "node",
    "resolveJsonModule": true,
    "isolatedModules": true,
    "noImplicitAny": true,
    "downlevelIteration": true,
    "noEmit": true,
    "jsx": "react",
    "typeRoots": [
      "./node_modules/@types",
      "./src/@types"
    ]
  },
  "include": [
    "src"
  ],
  "exclude": [
    "config-overrides.js"
  ]
}

Expected Result

no errors

Actual Result

Line 32:37: 'K' is defined but never used. Allowed unused vars must match /^_/u @typescript-eslint/no-unused-vars

Additional Info

Also getting is already declared in the upper scope no-shadow
not sure it's related or might go away with the fix

Versions

package	version
@typescript-eslint/eslint-plugin	4.3.0
@typescript-eslint/parser	4.3.0
TypeScript	4.0.3

[OriginLive]

another example of same error

export type FormValues<T> = {
  [K in keyof T]: FormValue;
};

[yeonjuan]

@OriginLive Hi :) I cannot reproduce it. Could you share your eslint config file or way to repro it?

[bradzacher]

This does not repro against master.
Likely you're using an old version of our tooling.

https://github.com/typescript-eslint/typescript-eslint/blob/master/docs/getting-started/linting/FAQ.md#how-do-i-check-to-see-what-versions-are-installed

[OriginLive]

just tried it again today and it seems to work. No idea what changed