7.8.2 introduces breaking changes

[ilyakonrad]

Describe the bug

Calling .next() with no arguments like this

new Observable((observer) => {
  observer.next()
}

shows error

Expected 1 arguments, but got 0.ts(2554)

Subscriber.d.ts(42, 10): An argument for 'value' was not provided.

Expected behavior

No breaking changes in patch version updates.

Version

7.8.2

Additional context

Duplicate of #7534.

[hakimio]

I guess now you have to explicitly specify the generic type:

new Observable<void>((observer) => {
  observer.next()
}

Either the default generic should be set to void (class Observable<T = void>) for the Observable or this breaking change should be postponed until v8.