This program causes hotspot to crash:

class Test {
    public static void main(String[] args) {
int.class.getEnclosingMethod();
    }
}

Version:

java version "1.5.0-beta3"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta3-b55)
Java HotSpot(TM) Server VM (build 1.5.0-beta3-b55, mixed mode)