BI-13 query variant fails.

[glennga]

The following variant of BI-13 raises a compilation error (disabling prefer-indexnl option prevents this error, the indexnl hints can stay):

SET `graphix.semantics.pattern` "edge-isomorphism";                                                
SET `graphix.evaluation.prefer-indexnl` "true";                                                    
                                                                                                   
LET                                                                                                
    zombies = (                                                                                    
        FROM                                                                                       
            GRAPH SNB.Native.SNBGraph                                                              
                (country:Country)<-[:IS_PART_OF]-(:City)<-[:IS_LOCATED_IN]-(zombie:Person)         
            LEFT MATCH                                                                             
                (zombie)<-[:HAS_CREATOR]-(message:Message)                                         
        WHERE                                                                                      
            zombie.creationDate < DATETIME("2012-11-06T00:00:00") AND                              
            country.name = "China" AND                                                             
            ( message IS UNKNOWN OR zombie.creationDate < DATETIME("2012-11-06T00:00:00") )        
        GROUP BY                                                                                   
            zombie.id           AS zombieId,                                                       
            zombie.creationDate AS zombieCreationDate                                              
        LET                                                                                        
            yearDiff  = GET_YEAR(DATETIME("2012-11-06T00:00:00")) - GET_YEAR(zombieCreationDate),  
            monthDiff = GET_MONTH(DATETIME("2012-11-06T00:00:00")) - GET_MONTH(zombieCreationDate),
            months    = 12 * yearDiff + monthDiff + 1                                              
        HAVING                                                                                     
            ( COUNT(message.id) / months ) < 1                                                     
        SELECT VALUE                                                                               
            zombieId                                                                               
    )                                                                                              
FROM                                                                                               
    zombies z,                                                                                     
    GRAPH SNB.Native.SNBGraph                                                                      
        (zombie:Person)                                                                            
LET                                                                                                
    zombieLikeCount = (                                                                            
        FROM                                                                                       
            GRAPH SNB.Native.SNBGraph                                                              
                (zombie)<-[:HAS_CREATOR]-(:Message)<-[:LIKES]-(likerZombie:Person),                
            zombies lz                                                                             
        WHERE                                                                                      
            likerZombie.id /*+indexnl*/ = lz AND                                                   
            likerZombie.creationDate < DATETIME("2012-11-06T00:00:00")                             
        SELECT VALUE                                                                               
            COUNT (DISTINCT likerZombie.id)                                                        
    )[0],                                                                                          
    totalLikeCount  = (                                                                            
        FROM                                                                                       
            GRAPH SNB.Native.SNBGraph                                                              
                (zombie)<-[:HAS_CREATOR]-(:Message)<-[:LIKES]-(likerPerson:Person)                 
        WHERE                                                                                      
            likerPerson.creationDate < DATETIME("2012-11-06T00:00:00")                             
        SELECT VALUE                                                                               
            COUNT(DISTINCT likerPerson.id)                                                         
    )[0],                                                                                          
    zombieScore = CASE                                                                             
        WHEN totalLikeCount = 0                                                                    
        THEN 0.0                                                                                   
        ELSE zombieLikeCount / totalLikeCount                                                      
    END                                                                                            
WHERE                                                                                              
    z /*+indexnl*/ = zombie.id                                                                     
SELECT                                                                                             
    zombie.id       AS zombieId,                                                                   
    zombieLikeCount AS zombieLikeCount,                                                            
    totalLikeCount  AS totalLikeCount,                                                             
    zombieScore     AS zombieScore                                                                 
ORDER BY                                                                                           
    zombieScore DESC,                                                                              
    zombieId ASC                                                                                   
LIMIT                                                                                              
    100;                                                                                           

With the following compilation error (index out-of-bounds error):

java.lang.IndexOutOfBoundsException: Index -1 out of bounds for length 0
        at jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64) ~[?:?]
        at jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70) ~[?:?]
        at jdk.internal.util.Preconditions.checkIndex(Preconditions.java:248) ~[?:?]
        at java.util.Objects.checkIndex(Objects.java:372) ~[?:?]
        at java.util.ArrayList.get(ArrayList.java:459) ~[?:?]
        at org.apache.asterix.optimizer.rules.am.AccessMethodUtils.createFinalIndexOnlySearchPlan(AccessMethodUtils.java:1609) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.AccessMethodUtils.createRestOfIndexSearchPlan(AccessMethodUtils.java:1830) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.BTreeAccessMethod.createBTreeIndexSearchPlan(BTreeAccessMethod.java:695) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.BTreeAccessMethod.createIndexSearchPlan(BTreeAccessMethod.java:332) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.BTreeAccessMethod.applyJoinPlanTransformation(BTreeAccessMethod.java:300) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.IntroduceJoinAccessMethodRule.checkAndApplyJoinTransformation(IntroduceJoinAccessMethodRule.java:455) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.IntroduceJoinAccessMethodRule.checkAndApplyJoinTransformation(IntroduceJoinAccessMethodRule.java:270) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.IntroduceJoinAccessMethodRule.checkAndApplyJoinTransformation(IntroduceJoinAccessMethodRule.java:270) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.IntroduceJoinAccessMethodRule.checkAndApplyJoinTransformation(IntroduceJoinAccessMethodRule.java:270) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.IntroduceJoinAccessMethodRule.checkAndApplyJoinTransformation(IntroduceJoinAccessMethodRule.java:270) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.IntroduceJoinAccessMethodRule.checkAndApplyJoinTransformation(IntroduceJoinAccessMethodRule.java:270) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.IntroduceJoinAccessMethodRule.checkAndApplyJoinTransformation(IntroduceJoinAccessMethodRule.java:270) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.IntroduceJoinAccessMethodRule.checkAndApplyJoinTransformation(IntroduceJoinAccessMethodRule.java:270) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.IntroduceJoinAccessMethodRule.checkAndApplyJoinTransformation(IntroduceJoinAccessMethodRule.java:270) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.IntroduceJoinAccessMethodRule.checkAndApplyJoinTransformation(IntroduceJoinAccessMethodRule.java:270) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.IntroduceJoinAccessMethodRule.checkAndApplyJoinTransformation(IntroduceJoinAccessMethodRule.java:270) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.IntroduceJoinAccessMethodRule.checkAndApplyJoinTransformation(IntroduceJoinAccessMethodRule.java:270) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.IntroduceJoinAccessMethodRule.checkAndApplyJoinTransformation(IntroduceJoinAccessMethodRule.java:270) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.IntroduceJoinAccessMethodRule.checkAndApplyJoinTransformation(IntroduceJoinAccessMethodRule.java:270) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.IntroduceJoinAccessMethodRule.checkAndApplyJoinTransformation(IntroduceJoinAccessMethodRule.java:270) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.optimizer.rules.am.IntroduceJoinAccessMethodRule.rewritePre(IntroduceJoinAccessMethodRule.java:143) ~[asterix-algebra-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.hyracks.algebricks.core.rewriter.base.AbstractRuleController.rewriteOperatorRef(AbstractRuleController.java:79) ~[algebricks-core-0.3.9-SNAPSHOT.jar:0.3.9-SNAPSHOT]
        at org.apache.hyracks.algebricks.compiler.rewriter.rulecontrollers.SequentialFixpointRuleController.rewriteWithRuleCollection(SequentialFixpointRuleController.java:52) ~[algebricks-compiler-0.3.9-SNAPSHOT.jar:0.3.9-SNAPSHOT]
        at org.apache.hyracks.algebricks.core.rewriter.base.HeuristicOptimizer.runOptimizationSets(HeuristicOptimizer.java:92) ~[algebricks-core-0.3.9-SNAPSHOT.jar:0.3.9-SNAPSHOT]
        at org.apache.hyracks.algebricks.core.rewriter.base.HeuristicOptimizer.runLogicalOptimizationSets(HeuristicOptimizer.java:83) ~[algebricks-core-0.3.9-SNAPSHOT.jar:0.3.9-SNAPSHOT]
        at org.apache.hyracks.algebricks.core.rewriter.base.HeuristicOptimizer.optimize(HeuristicOptimizer.java:63) ~[algebricks-core-0.3.9-SNAPSHOT.jar:0.3.9-SNAPSHOT]
        at org.apache.hyracks.algebricks.compiler.api.HeuristicCompilerFactoryBuilder$CompilerImpl.optimize(HeuristicCompilerFactoryBuilder.java:163) ~[algebricks-compiler-0.3.9-SNAPSHOT.jar:0.3.9-SNAPSHOT]
        at org.apache.asterix.api.common.APIFramework.compileQuery(APIFramework.java:268) ~[asterix-app-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.app.translator.QueryTranslator.rewriteCompileQuery(QueryTranslator.java:3733) ~[asterix-app-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]
        at org.apache.asterix.app.translator.QueryTranslator.lambda$handleQuery$2(QueryTranslator.java:4646) ~[asterix-app-0.9.9-SNAPSHOT.jar:0.9.9-SNAPSHOT]