[rules-users] possible bug in latest SNAPSHOT - AccumulateFunction.init() is called when calling modify()

Hi, I may have found a bug with accumulate and 'modify(..)' function call. It seems that once the modify(..) is called it indirectly calls AccumulateFunction.init() which invalidates accumulated data. I have included a simple test case: I am using the latest snapshot of Drools 5.1.SNAPSHOT I have created a sample Drools project and just modified the Sample.drl with this: ------------------------------------------------------------- import java.util.List; import java.util.ArrayList; declare Holder list : List end rule "Hello World" when m : Message( ) then insert(new Holder()); end rule "GoodBye" when $holder : Holder( list == null ) $messages : List() from accumulate( $message: Message(), collectList($message) ) then System.out.println($messages); //<-- here the $messages list has one element modify($holder) { setList($messages) } System.out.println($messages); //<-- here the $messages list is empty end ----------------------------------------------------- Let me know if you need more information. I can create a JIRA if needed. Thank you! Best regards, Michal