TS4076 Paradox (noUnusedLocals) Part 2

[tsofist]

TypeScript Version: 2.9.1

Problem is not reproduced in 3.0.0-dev.20180601

tsconfig

{
  "compilerOptions": {
    "strict": true,
    "strictNullChecks": true,
    "sourceMap": true,
    "declaration": true, // ← IMPORTANT
    "noUnusedLocals": true, // ← IMPORTANT
    "noEmit": true
  },
  "include": [
    "src"
  ],
  "exclude": [
    "node_modules"
  ]
}

Code

moduleA.ts

export {
    Hash, IStringHash, TStringHash
}

interface Hash<T> {
    [key: string]: T;
}

interface IStringHash extends Hash<string> {
}

type TStringHash = Hash<string>;

moduleB.ts

import {TStringHash, IStringHash} from "./moduleA";

const C_TYPE: TStringHash = {};
const C_INTF: IStringHash = {};

export function doSome(stub: string,
                       // ↓↓↓ No error due to explicitly specified type TStringHash
                       viaType0: TStringHash = C_TYPE,
                       viaInterface0: IStringHash = C_INTF,
                       // ↓↓↓ TS4076: Parameter 'viaType1' of exported function has or is using name 'Hash' from external module "./src/moduleA" but cannot be named.
                       viaType1 = C_TYPE,
                       viaInterface = C_INTF) {
    console.log(viaType0, viaType1, viaInterface0, viaInterface);
}

moduleC.ts

import {
    Hash, // ←←← Dubious decision. TS6133: 'Hash' is declared but its value is never read.
    TStringHash, IStringHash
} from "./moduleA";

const C_TYPE: TStringHash = {};
const C_INTF: IStringHash = {};

export function doSome(stub: string,
                       viaType0: TStringHash = C_TYPE,
                       viaInterface0: IStringHash = C_INTF,
                       // ↓↓↓ No error due to imported Hash
                       viaType1 = C_TYPE,
                       viaInterface = C_INTF) {
    console.log(viaType0, viaType1, viaInterface0, viaInterface);
}

Expected behavior:
No errors in moduleB.ts

Actual behavior:
Error in moduleB.ts: TS4076: Parameter 'viaType1' of exported function has or is using name 'Hash' from external module "./src/moduleA" but cannot be named.

Related Issues: #24287

[tsofist]

Solved by 2.9.2
Thanks!