index types not discoverable across files (via find-all-references)

[dwelle]

• VSCode Version: 1.48.2 (and 1.49.0-insider)
• OS Version: win 7

Steps to Reproduce:

Create two files:

// file a.ts
// ----------------------------------------------------------------
export type Config = {
    user: number;
}

const someUser: Config["user"] = 42; // (1)

// file b.ts
// ----------------------------------------------------------------
import { Config } from "./a";

const someUser = Config["user"] = 42; // (2)
// const user: Config["user"] = 42; // (3) if you uncomment this, it'll find all references for this file

Then try find all references for the Config["user"]. It finds references in the same file (1), but not in different files (2), UNLESS the file also contains that index type annotating a variable with the same name as the index (3), in which case it finds all references for that file including (2).

Try on CSB: https://codesandbox.io/s/priceless-easley-2w6pi?file=/src/b.ts

This relates to index types only, not base types.

Affects find/peek references/definitions etc.

Does this issue occur when all extensions are disabled?: Yes

[dwelle]

Mhm, it seems it related only to a specific CRA codebase. Will investigate more. nvm, the problem is just a bit more complicated. Updated the OP.

[RyanCavanaugh]

Then try find all references for the Config["user"]

Which one of the three did you invoke this on?

[dwelle]

on (2) (and also the definition itself --- the user: number prop), because it works with (1) as noted. Uncommenting (3) makes everything work, too.