Deno bundle error with constructor property initialisation

[c4spar]

Following example works with deno run but fails after bundling it with deno bundle.

Example code:

export class Foo {
  bar = this.options.bar;
  constructor(
    protected options: { bar: string },
  ) {}
}

console.log(
  new Foo({ bar: "baz" }),
);

Bundled code:

class Foo1 {
    bar = this.options.bar;
    constructor(options){
        this.options = options;
    }
}
console.log(new Foo1({
    bar: "baz"
}));
export { Foo1 as Foo };

Error message:

error: Uncaught TypeError: Cannot read property 'bar' of undefined
    bar = this.options.bar;
                       ^
    at Foo1.<instance_members_initializer> (file:///bundle.js:2:24)
    at new Foo1 (file:///bundle.js:3:16)
    at file:///bundle.js:7:13

Version:

deno 1.8.1 (release, x86_64-apple-darwin)
v8 9.0.257.3
typescript 4.2.2

[nayeemrmn]

This was fixed in swc-project/swc#930. We need to add a typescript_class_properties pass for it, but there were bugs/complications: swc-project/swc#987.

[nayeemrmn]

Actually, we ultimately decided to have "useDefineForClassFields": true in our internal tsconfig (#7148 (comment)), so tsc (the unbundled behaviour) would match the current behaviour of swc and we would consolidate like that instead.

It seems we added "useDefineForClassFields" on the sly to the list of ignored compiler options in #7228 and documented it in #9196... but grepping through the code base I don't see anywhere it's actually set to true 😅