Cherry-picked to 6.3.x branch with https://github.com/droolsjbpm/drools/commit/a894c288c
Created attachment 1115874 [details] Original reproducer with updated version I have tried the original reproducer from BZ 1293587 and it still fails. I have tested it also against 6.4.0-SNAPSHOT and it fails as well. To reproduce, unzip the attached reproducer and run: mvn clean verify exec:java -Dexec.mainClass=fr.jsoula.jboss.drools.bugs.comparable.ComparableBug
Cherry-picked to 6.3.x branch with https://github.com/droolsjbpm/drools/commit/001e2d28d
Verified using the original reproducer in BRMS 6.2.1 CR2.