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 = '1.42';
  +const String version = '1.43';
   
   // Restriction on statements and expressions.
   const int stmtLength = 2;
  
positive.code:   // Emit a new program scope that introduces a new local variable.
    bool emitScope(int depth) {
      DartType tp = getType();
      emitLn('{ ${tp.name} $localName${localVars.length} = ', newline: false);
      emitExpr(0, tp);
      emit(';', newline: true);
      indent += 2;
      localVars.add(tp);
  
negative.code:               emit(') ');
                break;
            }
            localVars.removeLast(); // will get type
            nest++;
            iterVars.add("$localName$i");
            localVars.add(DartType.INT);
            emitCollectionElement(depth + 1, tp);
            localVars.removeLast();
            iterVars.removeLast();
            nest--;
            break;
          }
  