TypeScript: Certain resolution-dependent enum emit isn't correctly flagged as an error under `isolatedModules`

🔎 Search Terms

• isolatedModules
• enum
• cross module
• export

🕗 Version & Regression Information

• This is a crash
• This changed between versions ______ and _______
• This changed in commit or PR _______
• This is the behavior in every version I tried, and I reviewed the FAQ for entries about _________
• I was unable to test this on prior versions because _______

Test on Playground with version 3.9.7 and version 5.2.2, got the same incorrect result.

⏯ Playground Link

Workbench Repro

💻 Code

// @showEmit
// @isolatedModules: true
// @filename: foo.ts
export enum Foo {
    A = 10
}

// @filename: index.ts
import { Foo } from "./foo";
export enum Bar {
    B = Foo.A,
    C
}

Workbench Repro

🙁 Actual behavior

Please notice the value of Bar.C

import { Foo } from "./foo";
export var Bar;
(function (Bar) {
    Bar[Bar["B"] = 10] = "B";
    Bar[Bar["C"] = 11] = "C";
})(Bar || (Bar = {}));

🙂 Expected behavior

Emit a warning or an error, and generate code that does not rely on other imports.

Example:

import { Foo } from "./foo";
export var Bar;
(function(Bar) {
    Bar[Bar["B"] = Foo.A] = "B";
    Bar[Bar["C"] = void 0] = "C";
})(Bar || (Bar = {}));

The Bar.C is void 0, since it cannot be refered.

Additional information about the issue

• https://github.com/swc-project/swc/issues/8147