[jboss-jira] [JBoss JIRA] (DROOLS-4864) accumulate causes NullPointerException

[Vedran Prišćan (Jira)]

Vedran Prišćan created DROOLS-4864:
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             Summary: accumulate causes NullPointerException
                 Key: DROOLS-4864
                 URL: https://issues.redhat.com/browse/DROOLS-4864
             Project: Drools
          Issue Type: Bug
    Affects Versions: 7.30.0.Final
            Reporter: Vedran Prišćan
            Assignee: Mario Fusco


NullPointerException is thrown in AddRemoveRule::iterateLeftTuple when *removing* a rule that contains *accumulate* with *max* function and a *source pattern that matches no object*. 

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mnc_standalone               | Caused by: java.lang.NullPointerException
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.core.phreak.AddRemoveRule.iterateLeftTuple(AddRemoveRule.java:1040)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.core.phreak.AddRemoveRule.iterateLeftTuple(AddRemoveRule.java:1047)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.core.phreak.AddRemoveRule.iterateLeftTuple(AddRemoveRule.java:1053)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.core.phreak.AddRemoveRule.iterateLeftTuple(AddRemoveRule.java:1053)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.core.phreak.AddRemoveRule.visitChild(AddRemoveRule.java:969)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.core.phreak.AddRemoveRule.lambda$processLeftTuples$1(AddRemoveRule.java:927)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.core.common.DefaultFactHandle$SingleLinkedTuples.forEachLeftTuple(DefaultFactHandle.java:728)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.core.common.DefaultFactHandle.forEachLeftTuple(DefaultFactHandle.java:924)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.core.phreak.AddRemoveRule.processLeftTuples(AddRemoveRule.java:922)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.core.phreak.AddRemoveRule.removeRule(AddRemoveRule.java:178)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.core.reteoo.ReteooBuilder.removeTerminalNode(ReteooBuilder.java:191)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.core.reteoo.ReteooBuilder.removeRules(ReteooBuilder.java:177)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.core.impl.KnowledgeBaseImpl.removeObjectsGeneratedFromResource(KnowledgeBaseImpl.java:1735)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.compiler.builder.impl.KnowledgeBuilderImpl.removeObjectsGeneratedFromResource(KnowledgeBuilderImpl.java:2151)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.compiler.kie.builder.impl.KieBaseUpdater.removeResources(KieBaseUpdater.java:121)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.compiler.kie.builder.impl.KieBaseUpdater.run(KieBaseUpdater.java:66)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.core.impl.KnowledgeBaseImpl.enqueueModification(KnowledgeBaseImpl.java:745)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.compiler.kie.builder.impl.KieContainerImpl.update(KieContainerImpl.java:267)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.compiler.kie.builder.impl.KieContainerImpl.update(KieContainerImpl.java:237)
mnc_standalone               | 	at deployment.mnc-full-bundle.ear//org.drools.compiler.kie.builder.impl.KieContainerImpl.updateToVersion(KieContainerImpl.java:195)
mnc_standalone               | 	at deployment.my-full-bundle.ear.rules-comp-impl.jar//com.my.rules.RuleKnowledgeBase.removeRuleFromKnowledgeBase(RuleKnowledgeBase.java:481)
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