When MarshalledInvocation tries to unmarshall the arguments, it just ignores any errors:

public Object[] getArguments()
{
if (this.args == null)
{
try

{ this.args = (Object[]) marshalledArgs.get(); }

catch (Exception e)

{ e.printStackTrace(); }

}
return args;
}

The error should be rethrown as a RuntimeException NOT ignored and dumped to STDERR