I am seeing a null pointer in MemberBox.java related to the changes in 73a8b29:

// Wrapped java.lang.NullPointerException: Cannot read the array length because "args" is null
for (int i = 0; i < args.length; ++i) {
    if (args[i] instanceof Delegator) {
        args[i] = ((Delegator) args[i]).getDelegee();
    }
}

Tracing back the issue I see Context.emptyArgs is indeed null when calling MemberBox.invoke() in JavaMembers.java:

// Context.emptyArgs is null
rval = bp.getter.invoke(javaObject, Context.emptyArgs);

The weird thing is, though, that Context.emptyArgs actually should be the same as ScriptRuntime.emptyArgs (which is not null) – but it obviously isn’t:

// This resolves the issue
rval = bp.getter.invoke(javaObject, ScriptRuntime.emptyArgs);

It could be there is some code in my project causing this, see antville/helma#75 (comment).

Unfortunately, I am not very experienced with Java, just inherited the Java/Rhino part of the project. Thus, I would be very thankful for any suggestions.