anchor.diff:  
     @override
     @failingTest
  -  @potentialAnalyzerProblem
  -  test_nonBoolExpression_functionType() async {
  -    return super.test_nonBoolExpression_functionType();
  -  }
  -
  -  @override
  -  @failingTest
     @FastaProblem('https://github.com/dart-lang/sdk/issues/31628')
     test_nonConstCaseExpression_constField() async {
       return super.test_nonConstCaseExpression_constField();
  
positive.code: 
    @override
    @failingTest
    @FastaProblem('https://github.com/dart-lang/sdk/issues/28434')
    test_constructorDeclaration_scope_signature() async {
      return super.test_constructorDeclaration_scope_signature();
  
negative.code:   @override
    @failingTest
    @potentialAnalyzerProblem
    test_finalNotInitialized_hasNativeClause_hasConstructor() async {
      return super.test_finalNotInitialized_hasNativeClause_hasConstructor();
    }
  