Description of problem: Customer complains that rules that used to work now result in Exceptions. Mario has isolated the one-line fix necessary to fix this issue on Drools 5.3. Please use the JIRA at [1] for test information. [1] https://issues.jboss.org/browse/JBRULES-3283
Fixed by https://github.com/droolsjbpm/drools/commit/e02698b08b6ee88dd0ad713f541aeeef1b008aa2
Verified in ER4