While trying to write some unit tests for Kotlin around waiting for upload and download I discovered something that looks like a bug.

1. Open a synchronized Realm
2. Restart Sync on the server using the Admin API, this correctly triggers a session error handler.
3. Attempt to call SyncSession: wait_for_upload_completion and SyncSession::wait_for_download_completion

Expected result: I would expect the function to return some kind of error_code in the callback we provide.

Actual result: It returns succesfully.