Description Mohamed Mansour 2003-04-23 14:48:44 EDT

According to Jim Hugunin.
"The bug has to do with a situation where code in a class can run before that
class's static initializer has completed.  We've designed the
JoinPoint.StaticPart object initialization code so that it is robust to most
such issues, but we've apparently missed a case."


I am using AspectJ 1.1rc1

public aspect BaseAspect {
   pointcut methodExec(): execution(* *..*(..)) && !within(BaseAspect);

   after () returning: methodExec() {
       thisJoinPoint.getSignature();
   }
}

public abstract class Expression {
    public static Expression EMPTYSTRING = new Operator();
}
 
public class Operator extends Expression {
  
   public Operator() {
    initOperands(); // the bug goes away if you remove this call. 
   }

   public void initOperands() {
   }

   public static void main (String [] args) {
     Operator t = new Operator();
   }

}

That stack dump
Exception in thread "main" java.lang.ExceptionInInitializerError
Caused by: java.lang.NullPointerException
        at BaseAspect.ajc$afterReturning$BaseAspect$df(BaseAspect.java:10)
        at Operator.initOperands(Operator.java:8)
        at Operator.<init>(Operator.java:4)
        at Expression.<clinit>(Expression.java:2)