Bug Report

🔎 Search Terms

• import omit
• invalid typedef

🕗 Version & Regression Information

Not sure when does it start but I discovered with 4.8.4 and still seems to occur with 4.9.3 and 5.0.0-dev.20221116

⏯ Playground Link

This can not be reproduced on playground as it requires multiple files. Instead I've created a repo with all the files
https://github.com/Gozala/ts-import-omit-bug

💻 Code

bug.js

import * as B from "./box.js"
import * as W from "./wrap.js"

/**
 * @template C
 * @param {C} source
 * @returns {W.Wrap<C>}
 */
const wrap = source => {
  throw source
}

/**
 * @returns {B.Box<number>}
 */
const box = (n = 0) => ({ unbox: () => n })

export const bug = wrap({ n: box(1) })

box.ts

export interface Box<T> {
  unbox(): T
}

wrap.ts

export type Wrap<C> = {
  [K in keyof C]: { wrapped: C[K] }
}

🙁 Actual behavior

On incremental build TS generates invalid bug.d.ts file, which seems to omit B import.

export const bug: W.Wrap<{
    n: B.Box<number>;
}>;
import * as W from "./wrap.js";

E.g you could trigger incremental build by running npm test in linked repo or by running following command

tsc --build && echo \"\\nexport let a = 1\" >> ./src/bug.js && tsc --bulid

🙂 Expected behavior

It should always produce correct typedefs like

export const bug: W.Wrap<{
    n: B.Box<number>;
}>;
import * as B from "./box.js";
import * as W from "./wrap.js";