[init-declarations] It report Variable 'b' should be initialized on declaration. when I declare nested namespace in a index.d.ts file

[drylint]

• 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

{
  "rules": {
    "init-declarations": [0],
    "@typescript-eslint/init-declarations": [2, "always"],
  }
}

// index.d.ts

// eg.1
declare namespace obj {
  const a: number
}

// eg.2
declare namespace obj1 {
  declare const a: number
  namespace obj1_1 {
    const b: string // Error info: Variable 'b' should be initialized on declaration.
  }
}

// eg.3
declare namespace obj2 {
  const a: number
  namespace obj2_2 {
    declare const b: string
  }
}

Expected Result

Expected that don't report error with const b: string in eg.2

Actual Result

eg.1 and eg.3 is OK, but eg.2 was reported Variable 'b' should be initialized on declaration.

Additional Info

Versions

package	version
@typescript-eslint/eslint-plugin	5.8.1
@typescript-eslint/parser	5.8.1
TypeScript	4.5.4
ESLint	8.5.0
node	16.13.1

[lonyele]

Just curious. Doesn't any declare under the declare namespace obj { ... } show some error like A 'declare' modifier cannot be used in an already ambient context.?

https://www.typescriptlang.org/play?#code/LAKA9GAECmDmB0BGUATaBjANgQwE7UgDtsBbaAZwAdt0CB7AIwCtIBvUSSdOw8gF0jYAXEQCuJBtFygAvqFAQYCAEyoMOfEVIVqtSIyaI2HSGix4C3XgOFiJUk8TJUa9ZogD6R9iE6cr-JAMIvy4AJaEsJCKAKK4uHS4kBEAZnQiAGp4YdgMmAQA5AwFkOQAFnSimChBBBFhfDmYYQBe0DU8pup42I088CZyIEMKUHDwAMxq5ppOOq76zMrGvlw8gbaE4pLSq3MuegbKHss+fl0zlusCwaV84ZGDskA

[JoshuaKGoldberg]

Yup. In theory this is why it's generally preferable to post playground links like that one 👆 instead of screenshots.