Cannot compile rules that use functions within collects ------------------------------------------------------- Key: DROOLS-5645 URL: https://issues.redhat.com/browse/DROOLS-5645 Project: Drools Issue Type: Bug Components: executable model Affects Versions: 7.43.1.Final Reporter: Ciprian Chiru Assignee: Luca Molteni Priority: Major Give the following example rule:     {code:java} import java.util.*; global java.util.Set controlSet; global org.example.drools.service.DummyService dummyService; function String defaultIfBlank(String input, String default){ return ""; } rule "will execute per each Measurement having ID color" no-loop when Measurement( id == "color", $colorVal : val ) List(size() > 0) from accumulate(String($s: this) from dummyService.dummy($colorVal), collectList(defaultIfBlank($s, "test"))) then controlSet.add($colorVal); end{code}     It fails with: {code:java} [ERROR] Message [id=1, kieBase=defaultKieBase, level=ERROR, path=rules/dummy-rule.drl, line=-1, column=0 [ERROR] text=Root node of expression should be a declaration]{code}   Can be reproduced with _7.44.0-SNAPSHOT_ .