public class LamdaMethodBug {
	static void foo(){
		List<String> list = Collections.emptyList();
		//implicit final
		String toFind = "bar";
		//explicit final
		final int expectedIndex = 3;
		//other implicit final
		AtomicInteger missed = new AtomicInteger();
		list.forEach(item->{
			synchronized(missed){
				if (item.indexOf(toFind) != expectedIndex){
					missed.incrementAndGet();
				}
			}
		});
		if (missed.get() > 0){
			throw new AssertionError();
		}
	}
}