firstValueFrom not matching documented behavior

[jpage-godaddy]

Describe the bug

According to the documentation for firstValueFrom:

If the observable stream completes before any values were emitted, the returned promise will reject with EmptyError or will resolve with the default value if a default was specified.

However, with this line of code:

const match = await firstValueFrom(
  this.someStringObservable().pipe(find((g) => g === 'blah')),
);

...the match value resolves to undefined; EmptyError is not thrown.

Expected behavior

firstValueFrom should either match the documented behavior or the documentation should be fixed.

Reproduction code

const { from, firstValueFrom, find } = await import("rxjs");
const result = await firstValueFrom(from(['a', 'b', 'c']).pipe(find(x => x === 'd')));
console.log({ result });

Reproduction URL

No response

Version

7.8.1

Environment

No response

Additional context

No response

[jpage-godaddy]

Sorry, invalid. Missed that find does emit an undefined value.