anchor.diff:  // Version of DartFuzz. Increase this each time changes are made
   // to preserve the property that a given version of DartFuzz yields
   // the same fuzzed program for a deterministic random seed.
  -const String version = '1.34';
  +const String version = '1.36';
   
   // Restriction on statements and expressions.
   const int stmtLength = 2;
  
positive.code:     globalVars = fillTypes1();
      globalVars.addAll(DartType.allTypes); // always one each
      globalMethods = fillTypes2();
      classFields = fillTypes2();
      classMethods = fillTypes3(classFields.length);
      classParents = <int>[];
      // Setup optional ffi methods and types.
  
negative.code:     return list;
    }
  
    List<List<DartType>> fillTypes2({bool isFfi = false, int limit = 4}) {
      final list = <List<DartType>>[];
      for (int i = 0, n = 1 + rand.nextInt(limit); i < n; i++) {
        list.add(fillTypes1(isFfi: isFfi));
      }
      return list;
  