tkobayas commented on code in PR #6768:
URL: 
https://github.com/apache/incubator-kie-drools/pull/6768#discussion_r3449486813


##########
drools-core/src/main/java/org/drools/core/phreak/PhreakRuleTerminalNode.java:
##########
@@ -113,6 +113,7 @@ public static void doLeftTupleInsert(ReteEvaluator 
reteEvaluator,
         // most recent PropagationContext is required to maintain the right 
recency which triggers the match
         PropagationContext pctx = leftTuple.findMostRecentPropagationContext();
         if ( rtnNode.getRule().isNoLoop() && sameRules(rtnNode, 
pctx.getTerminalNodeOrigin()) ) {
+            executor.addDormantTuple(leftTuple);

Review Comment:
   When the tuple is suppressed because of `no-loop`, the tuple was not belong 
to activeMatches nor dormantMatches. This is how it became orphan in the NPE 
case.
   
   Explicitly add it to dormantMatches.



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