[jboss-jira] [JBoss JIRA] Closed: (JBRULES-763) predicate with multiple variable references causes NPE

predicate with multiple variable references causes NPE ------------------------------------------------------ Key: JBRULES-763 URL: http://jira.jboss.com/jira/browse/JBRULES-763 Project: JBoss Rules Issue Type: Bug Security Level: Public(Everyone can see) Affects Versions: 3.0.6 Environment: Mac OS X 10.4.9 JBoss Rules 3.0.6 Reporter: Steve Miner Assigned To: Mark Proctor Attachments: drools-predicate-bug.zip I'm trying to use a predicate that has multiple references to bound variables all within the same fact. If I use only one variable, it works, but it causes a NPE if I have two references. // This rule causes a NPE rule "more friends than enemies" when $p : Person($enemies : enemies, $friends : friends -> ($friends.size() > $enemies.size())) then System.out.println($p + " has more friends than enemies"); end stack trace org.drools.RuntimeDroolsException: java.lang.NullPointerException at org.drools.rule.PredicateConstraint.isAllowed(Unknown Source) at org.drools.common.BetaNodeBinder.isAllowed(Unknown Source) at org.drools.reteoo.LeftInputAdapterNode.assertObject(Unknown Source) at org.drools.reteoo.ObjectSource.propagateAssertObject(Unknown Source) at org.drools.reteoo.ObjectTypeNode.assertObject(Unknown Source) at org.drools.reteoo.Rete.assertObject(Unknown Source) at org.drools.reteoo.ReteooRuleBase.assertObject(Unknown Source) at org.drools.reteoo.ReteooWorkingMemory.doAssertObject(Unknown Source) at org.drools.common.AbstractWorkingMemory.assertObject(Unknown Source) at org.drools.common.AbstractWorkingMemory.assertObject(Unknown Source) at com.sample.DroolsTest.main(DroolsTest.java:51) Caused by: java.lang.NullPointerException at com.sample.Rule_more_friends_than_enemies_0Predicate0Invoker.evaluate(Rule_more_friends_than_enemies_0Predicate0Invoker.java:13) ... 11 more