java.lang.NullPointerException
	at org.netbeans.modules.debugger.jpda.actions.StepIntoActionProvider.exec(StepIntoActionProvider.java:164)
	at org.netbeans.modules.debugger.jpda.util.Operator$1.run(Operator.java:142)
[catch] at java.lang.Thread.run(Thread.java:595)