I found, that IntelliJ Idea with Kotlin 1.3.41 shows invalid result for
poll() method of ConcurrentLinkedQueue. It is nullable, however kotlin thinks that not (e.g. code
val x = queue.poll(); x.myField = 123; does not fail).
Question: what is better to do with the following bugs? I can create Youtrack issue or PR at github to fix annotations.