Runtime error when using non-boolean expression as a constraint --------------------------------------------------------------- Key: JBRULES-2956 URL: https://issues.jboss.org/browse/JBRULES-2956 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-compiler Affects Versions: 5.2.0.M2 Reporter: Wolfgang Laun Assignee: Mark Proctor declare Num num : Integer even : boolean end rule start when then insert( new Num( 42, true ) ); end rule sumem when $n: Num( num, num + 1, eval(num + 1) ) then end All of these constraints result in a RUNTIME error ar java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Boolean org.drools.base.mvel.MVELPredicateExpression.evaluate(MVELPredicateExpression.java:97) -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira