anchor.diff:    @failingTest
     void test_parsePrimaryExpression_this() {
       super.test_parsePrimaryExpression_this();
  -  }
  -
  -  @failingTest
  -  void test_parsePrimaryExpression_true() {
  -    super.test_parsePrimaryExpression_true();
     }
   
     @failingTest
  
positive.code:   }
  
    @failingTest
    void test_parsePrimaryExpression_mapLiteral() {
      super.test_parsePrimaryExpression_mapLiteral();
    }
  
    @failingTest
    void test_parsePrimaryExpression_mapLiteral_typed() {
      super.test_parsePrimaryExpression_mapLiteral_typed();
    }
  
negative.code:   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
  
    @override
    Expression parseExpression(String source,
        {List<ErrorCode> codes,
        List<ExpectedError> errors,
        int expectedEndOffset}) {
      ScannerResult scan = scanString(source);
  
      return CompilerContext.runWithOptions(options, (CompilerContext c) {
        KernelLibraryBuilder library = new KernelLibraryBuilder(
  