[jboss-jira] [JBoss JIRA] Created: (JBRULES-2526) org.drools.rule.InvalidPatternException: "Required Declarations not bound" when using MVEL, and OR-ing evals together

[Chris DeLashmutt (JIRA)]

org.drools.rule.InvalidPatternException: "Required Declarations not bound"  when using MVEL, and OR-ing evals together
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                 Key: JBRULES-2526
                 URL: https://jira.jboss.org/browse/JBRULES-2526
             Project: Drools
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: drools-core  (expert)
    Affects Versions: 5.1.0.CR1
            Reporter: Chris DeLashmutt
            Assignee: Mark Proctor
         Attachments: mvel-declarations-problem.zip

There is an issue when using multiple groups of OR'd evals and the mvel dialect.  Drools is throwing an InvalidPatternException complaining that there are unbound declarations.  During tracing, it seems that the declaration was actually found, but offset for the pattern that is resolved in BuildUtils.checkUnboundDeclarations() line: 239 isn't <= the offset of the pattern that was passed in with the declarations to the method.

Here is the rule:

rule "MVEL with OR groups and Evals"
	when
        $fieldB: Field(name == "fieldB")
        $fieldC: Field(name == "fieldC")
        $fieldD: Field(name == "fieldD")
        $fieldE: Field(name == "fieldE")
		(
        	eval($fieldB != null)
        	|| eval($fieldC != null) 
        ) 
        (
        	eval($fieldD != null)
        	|| eval($fieldE != null) 
        )
    then
        insert( new Result("Found") );
end

Here is the stack trace:

Thread [main] (Suspended (exception InvalidPatternException))	
	BuildUtils.checkUnboundDeclarations(BuildContext, Declaration[]) line: 258	
	EvalBuilder.build(BuildContext, BuildUtils, RuleConditionElement) line: 40	
	GroupElementBuilder$AndBuilder.build(BuildContext, BuildUtils, RuleConditionElement) line: 130	
	GroupElementBuilder.build(BuildContext, BuildUtils, RuleConditionElement) line: 77	
	ReteooRuleBuilder.addSubRule(BuildContext, GroupElement, Rule) line: 155	
	ReteooRuleBuilder.addRule(Rule, InternalRuleBase, IdGenerator) line: 128	
	ReteooBuilder.addRule(Rule) line: 117	
	ReteooRuleBase.addRule(Rule) line: 409	
	ReteooRuleBase(AbstractRuleBase).addRule(Package, Rule) line: 638	
	ReteooRuleBase(AbstractRuleBase).addPackages(Collection<Package>) line: 520	
	ReteooRuleBase.addPackage(Package) line: 435	
	TestDeclarations.testDeclarations() line: 41	
... (some stack removed for clarity)
	RemoteTestRunner.main(String[]) line: 197	


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