[jboss-jira] [JBoss JIRA] Commented: (JBRULES-612) NPE on asserting facts before reading rules with retract

[Michael Neale (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBRULES-612?page=comments#action_12351488 ] 
            
Michael Neale commented on JBRULES-612:
---------------------------------------

ouch thats nasty.

Thankfully should not appear in 3.2. Good luck edson !

> NPE on asserting facts before reading rules with retract
> --------------------------------------------------------
>
>                 Key: JBRULES-612
>                 URL: http://jira.jboss.com/jira/browse/JBRULES-612
>             Project: JBoss Rules
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 3.0.5
>         Environment: Windows XP, JDK 1.5.0_07
>            Reporter: Justine Hlista
>         Assigned To: Edson Tirelli
>             Fix For: 3.0.6
>
>         Attachments: test.tar.gz
>
>
> I have a scenario that asserts two simple facts, then reads a rule file, then fires the rules. One of the rules retracts one of the facts, then modifies another object. An NPE results when things are run as in the attached files.
> However, if the rule file is read first, then the facts are asserted, there is no NPE.
> Alternatively, if the second rule, the consequence of which retracts one of the facts, is modified so that the retract is the last statement in the consequence, then the NPE does not occur, even if the facts are asserted before the rules are read.

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