Issue

• The following rule works fine:

  rule "Rule"
      when
          forall (Fact(tag == "X")) 
          forall(Fact(tag2 == "Y"))
          (
              forall(Fact(value == 42)) or
              Fact(value == 43) 
          )
      then
      end
  

• Whereas this one produces a NullPointerException when matching an instance of Fact with {value:42, tag:"X", tag2: "Y"}:

  rule "Rule"
      when
          forall (Fact(tag == "X")) 
          (
              forall(Fact(value == 42)) or
              Fact(value == 43) 
          )
          forall(Fact(tag2 == "Y"))
      then
      end
  

• Note the two rules are functionally equivalent. They only differ with respect to the order of the conditional elements.