[rules-users] NullPointerException for Integer null

Hello, For following rule, NullPointerException is thrown for null id in 4.x. is this expected? Please clarify. Foo{ Integer id; } Rule "null check" foo : Foo(id==null) then end stack trace: java.lang.NullPointerException at org.drools.base.extractors.BaseObjectClassFieldExtractor.getIntValue(BaseObjectClassFieldExtractor.java:95) at org.drools.base.ClassFieldExtractor.getIntValue(ClassFieldExtractor.java:197) at org.drools.base.evaluators.IntegerFactory$IntegerLessEvaluator.evaluate(IntegerFactory.java:241) at org.drools.rule.VariableRestriction.isAllowed(VariableRestriction.java:73) at org.drools.rule.VariableConstraint.isAllowed(VariableConstraint.java:67) at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137) at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:318) at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:162) at org.drools.reteoo.Rete.assertObject(Rete.java:175) at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192) at org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:911) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:883) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:684) at org.drools.reteoo.ReteooStatelessSession.execute(ReteooStatelessSession.java:160) -- View this message in context: http://www.nabble.com/NullPointerException-for-Integer-null-tp23286041p23... Sent from the drools - user mailing list archive at Nabble.com.