Compound assignment operation like BigDecimal_type_property <op> Numeric/BigDecimal_value causes an unexpected result or error in MVEL. --------------------------------------------------------------------------------------------------------------------------------------- Key: DROOLS-5937 URL: https://issues.redhat.com/browse/DROOLS-5937 Project: Drools Issue Type: Bug Components: core engine Affects Versions: 7.48.0.Final Reporter: Toshiya Kobayashi Assignee: Toshiya Kobayashi Priority: Major Labels: support Attachments: reproducer_02801729_6_mvel.zip, reproducer_02801729_6e_6f.zip Compound assignment operation like BigDecimal_type_property <op> Numeric/BigDecimal_value causes an unexpected result or error in MVEL (org.mvel2). When using MVEL.eval method, the result of "+=" operation is incorrect, and "-=", "*=", "/=" operations result in an error. - BigDecimal_type_property <op> Numeric_value (Initial value of $bus.weight is 12000B) -- $bus.weight += 1000 ==> 1000 // incorrect result -- $bus.weight -= 1000 ==> Error -- $bus.weight *= 1000 ==> Error -- $bus.weight /= 1000 ==> Error - BigDecimal_type_property <op> BigDecimal_value (Initial value of $bus.weight and bdv are 12000B and 1000B respectively) -- $bus.weight += bdv ==> 1000 // incorrect result -- $bus.weight -= bdv ==> Error -- $bus.weight *= bdv ==> Error -- $bus.weight /= bdv ==> Error When using MVEL.executeExpression method, the result of "+=" operation is correct, while "-=", "*=", "/=" operations cause an error. - BigDecimal_type_property <op> Numeric_value (Initial value of $bus.weight is 12000B) -- $bus.weight += 1000 ==> 13000 // correct -- $bus.weight -= 1000 ==> Error -- $bus.weight *= 1000 ==> Error -- $bus.weight /= 1000 ==> Error - BigDecimal_type_property <op> BigDecimal_value (Initial value of $bus.weight and bdv are 12000B and 1000B respectively) -- $bus.weight += bdv ==> 13000 // correct -- $bus.weight -= bdv ==> Error -- $bus.weight *= bdv ==> Error -- $bus.weight /= bdv ==> Error $bus.weight is a BigDecimal type property. MVEL library should return correct result for any operations above.