Product Version = NetBeans IDE 8.1 (Build 201510222201)
Operating System = Windows 10 version 10.0 running on amd64
Java; VM; Vendor = 1.8.0_65
Runtime = Java HotSpot(TM) 64-Bit Server VM 25.65-b01

Reproducibility: Happens every time

In the following code the editor announced that the array count is only written to but never read from.
However it is read four lines later in the condition of the if statement

public RupStream<T> limit(long maxSize)
{
    final long[] count = {0};     //Variable wrapped into constant
    Supplier<Optional<T>> outputGenerator = () ->
        {
            Optional<T> oInput = generator.get();
            if (! oInput.isPresent()  ||  (++count[0] > maxSize)) {
                return Optional.empty();
            }
            return oInput;
        };
    RupStream<T> output = new RupStream<>(outputGenerator);
    return output;
}