executable-model fails with BigDecimal arithmetic when it's a scope of a method call

Customer( $ans : String.format("%,d", (rate * new BigDecimal("1000")).longValue()) )   // "rate" is a BigDecimal property of Customer class

java.lang.AssertionError: [Message [id=1, level=ERROR, path=src/main/java/org/drools/modelcompiler/bigdecimals/P14/LambdaExtractor14CE93CA77415634448D1C7EC1BB172A.java, line=22, column=936
   text=The operator * is undefined for the argument type(s) BigDecimal, long], Message [id=2, level=ERROR, path=src/main/java/org/drools/modelcompiler/bigdecimals/P14/LambdaExtractor14CE93CA77415634448D1C7EC1BB172A.java, line=0, column=0
   text=Java source of src/main/java/org/drools/modelcompiler/bigdecimals/P14/LambdaExtractor14CE93CA77415634448D1C7EC1BB172A.java in error:

...

    @Override()
    public java.lang.String apply(org.drools.modelcompiler.bigdecimaltest.Customer _this) {
        return String.format("%,d", _this.getRate() * new BigDecimal("1000").longValue());
    }
}
]]
	at org.drools.modelcompiler.BaseModelTest.createKieBuilder(BaseModelTest.java:154)
	at org.drools.modelcompiler.BaseModelTest.createKieBuilder(BaseModelTest.java:129)
	at org.drools.modelcompiler.BaseModelTest.getKieContainer(BaseModelTest.java:118)
	at org.drools.modelcompiler.BaseModelTest.getKieContainer(BaseModelTest.java:111)
	at org.drools.modelcompiler.BaseModelTest.getKieSession(BaseModelTest.java:107)
	at org.drools.modelcompiler.BaseModelTest.getKieSession(BaseModelTest.java:103)
	at org.drools.modelcompiler.bigdecimaltest.BigDecimalTest.bigDecimalArithmeticWithMthodCall(Unknown Source)