UnsupportedOperationException when using forall inside accumulate ----------------------------------------------------------------- Key: DROOLS-6025 URL: https://issues.redhat.com/browse/DROOLS-6025 Project: Drools Issue Type: Bug Affects Versions: 7.49.0.Final Reporter: Martin Panzer Assignee: Mario Fusco Priority: Major Attachments: drool-uoe-repro.zip I use the PatternDSL to dynamicly generate new rules based on user input. In some cases, generated rules can contain an forall inside of an accumulator (D.accumulate). This worked fine in 7.48.0.Final. In 7.49.0.Final, this throws the exception from below. For reference, this is an shortened example of the code. The full reproducer contains this code, and is attached to this issue. {code:java} ViewItem<?> forallRule = PatternDSL.and( PatternDSL.forall(// PatternDSL.pattern(grandV).expr(grand -> "A".equals(grand.getName()))// )); Variable<Integer> matchesSum = PatternDSL.declarationOf(Integer.class); ExprViewItem<Object> accumulate = D.accumulate(PatternDSL.and(PatternDSL.pattern(childV), forallRule), D.accFunction(IntegerSumAccumulateFunction.class, PatternDSL.valueOf(1)).as(matchesSum)); return PatternDSL.and(accumulate, PatternDSL.expr(matchesSum, (sum) -> sum == 1)); {code} {code:java} Exception in thread "main" java.lang.UnsupportedOperationException at org.drools.modelcompiler.KiePackagesBuilder.conditionToGroupElementType(KiePackagesBuilder.java:1119) at org.drools.modelcompiler.KiePackagesBuilder.recursivelyAddConditions(KiePackagesBuilder.java:622) at org.drools.modelcompiler.KiePackagesBuilder.buildAccumulate(KiePackagesBuilder.java:578) at org.drools.modelcompiler.KiePackagesBuilder.conditionToElement(KiePackagesBuilder.java:490) at org.drools.modelcompiler.KiePackagesBuilder.addSubConditions(KiePackagesBuilder.java:658) at org.drools.modelcompiler.KiePackagesBuilder.conditionToElement(KiePackagesBuilder.java:476) at org.drools.modelcompiler.KiePackagesBuilder.addSubConditions(KiePackagesBuilder.java:658) at org.drools.modelcompiler.KiePackagesBuilder.populateLHS(KiePackagesBuilder.java:446) at org.drools.modelcompiler.KiePackagesBuilder.compileRule(KiePackagesBuilder.java:246) at org.drools.modelcompiler.KiePackagesBuilder.build(KiePackagesBuilder.java:217) at org.drools.modelcompiler.builder.KieBaseBuilder.createKieBaseFromModel(KieBaseBuilder.java:80) at org.drools.modelcompiler.builder.KieBaseBuilder.createKieBaseFromModel(KieBaseBuilder.java:74) at org.drools.modelcompiler.builder.KieBaseBuilder.createKieBaseFromModel(KieBaseBuilder.java:60) at com.acme.Main.compile(Main.java:68) at com.acme.Main.main(Main.java:29) {code}