[jboss-jira] [JBoss JIRA] Created: (JBRULES-3129) Regression: Evaluator '==' does not support 'null' any more

[Wolfgang Laun (JIRA)]

Regression: Evaluator '==' does not support 'null' any more
-----------------------------------------------------------

                 Key: JBRULES-3129
                 URL: https://issues.jboss.org/browse/JBRULES-3129
             Project: Drools
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: drools-compiler
    Affects Versions: 5.2.0.Final
            Reporter: Wolfgang Laun
            Assignee: Mark Proctor
             Fix For: 5.2.1.Final


The DRL file given below causes these error messages (although it compiled and executed correctly in 5.1.1). 
=============================================================
Evaluator '==' does not support type 'null : [Rule name='rule1']

[DialectError message='Unable to wire compiled classes, probably related to compilation failures:[Error: unable to resolve method using strict-mode: java.lang.Object.a()]
[Near : {... list[0].a ....}]
                     ^
[Line: 1, Column: 9]']
=============================================================
import java.util.List

declare Three
  a : String
  b : String
  c : String
end

declare ListOfThree
  list : List
  clazz : Class
end

rule 'rule1'
when
    ListOfThree( list.size > 0 && list[0].a == null, $c: clazz );
then
    System.out.println( "rule1 " + $c.getSimpleName() );
end


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