anchor.diff:      createParser('@override }');
       ClassMember member = parser.parseClassMember('C');
       expectNotNullIfNoErrors(member);
  -    listener.assertErrorsWithCodes([ParserErrorCode.EXPECTED_CLASS_MEMBER]);
  +    listener.assertErrors(
  +        [expectedError(ParserErrorCode.EXPECTED_CLASS_MEMBER, 10, 1)]);
       expect(member, new isInstanceOf<MethodDeclaration>());
       MethodDeclaration method = member;
       expect(method.documentationComment, isNull);
  
positive.code:           ? ScannerErrorCode.EXPECTED_TOKEN
            : ParserErrorCode.EXPECTED_TOKEN,
        ParserErrorCode.EXPECTED_TOKEN
      ]);
    }
  
  
negative.code:     CompilationUnitMember member = parseFullCompilationUnitMember();
      expectNotNullIfNoErrors(member);
      if (usingFastaParser) {
        listener.assertErrors([
          expectedError(ParserErrorCode.MISSING_IDENTIFIER, 0, 0),
          expectedError(ParserErrorCode.TOP_LEVEL_OPERATOR, 0, 8)
        ]);
      } else {
        listener.assertErrorsWithCodes([ParserErrorCode.TOP_LEVEL_OPERATOR]);
  