[jboss-jira] [JBoss JIRA] (DROOLS-707) NullPointer when changing order of the rules

[Francesco Peloi (JIRA)]

    [ https://issues.jboss.org/browse/DROOLS-707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13043287#comment-13043287 ] 

Francesco Peloi commented on DROOLS-707:
----------------------------------------

Hi [~mfusco],

I found other 2 cases where I get strange behavior with variables and order of the rule lines.
I created a pull request with a few cases in the 6.1.x branch, they weren't working on master where I was getting another weird exception error (The import org.kie.api.definition.rule.Propagation cannot be resolved - maybe something has changed).
If I remember correctly, the line that throws a NPE is exactly the same as the problem you fixed already.

> NullPointer when changing order of the rules
> --------------------------------------------
>
>                 Key: DROOLS-707
>                 URL: https://issues.jboss.org/browse/DROOLS-707
>             Project: Drools
>          Issue Type: Bug
>    Affects Versions: 5.5.0.Final, 5.6.0.Final, 6.0.0.Final, 6.0.1.Final, 6.1.0.Final, 6.2.0.CR4
>            Reporter: Francesco Peloi
>            Assignee: Mario Fusco
>             Fix For: 6.2.0.Final
>
>
> Hi there,
>    we are having some serious issues with some rules, they are throwing a NullPointerException and we don't understand why. I have tried to narrow down the problem to the smallest rule possible, now this rule doesn't really make much sense put like this but the real rule is more complex with more constraints. At the end the result is the same: a NPE.
> I have tried it with many Drools versions from 5.x to latest 6.3.0-SNAPSHOT.
> I tested this in isolation with the minimum amount of code possible, and attached it as well if someone wants to try it quickly.
> Note that if line 2 of the when:
> $a : Integer()
> is moved as first line, the rule runs ok.
> Please find the reproducer here: https://groups.google.com/forum/#!topic/drools-usage/-oNqu3l4cqE



--
This message was sent by Atlassian JIRA
(v6.3.11#6341)