[jboss-jira] [JBoss JIRA] Commented: (JBRULES-2113) NPE thrown by LeftTuple.get() method

[M D (JIRA)]

    [ https://jira.jboss.org/jira/browse/JBRULES-2113?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12501711#action_12501711 ] 

M D commented on JBRULES-2113:
------------------------------

I ran in to this when I used "or with binding" similar to the one below:

(or pensioner : Person( sex == "f", age > 60 ) 
    address : Address( zip == "12345" ) )

Version: 5.1.0M1

> NPE thrown by LeftTuple.get() method
> ------------------------------------
>
>                 Key: JBRULES-2113
>                 URL: https://jira.jboss.org/jira/browse/JBRULES-2113
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 5.0.0.CR1
>         Environment: FOund in 5.0.0.CR1 - Community version. Windows XP
>            Reporter: Tom Murphy
>            Assignee: Mark Proctor
>
> the get() method on LeftTuple throws a null exception under certain circumstances, which are as yet undetermined.
> Here is the Code:
> public InternalFactHandle get(final int index) {
>         LeftTuple entry = this;
>         while ( entry.index != index ) {
>             entry = entry.parent;
>         }
>         return entry.handle;
>     }
> Note that the loop moves to each parent in succession, but never checks for entry != null. If it does get to the end of the chain, it will throw an NPE

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