anchor.diff:  //                  ^^^
   // [analyzer] STATIC_WARNING.INVALID_NULL_AWARE_OPERATOR
   //               ^
  -// [cfe] Operand of null-aware operation '?..' has type 'C' which excludes null
  +// [cfe] Operand of null-aware operation '?..' has type 'C' which excludes null.
   
     Expect.equals(expected3, actual11);
     if (c3 != null) {
  
positive.code: //                                                                ^^
  // [analyzer] STATIC_WARNING.INVALID_NULL_AWARE_OPERATOR
  //                                                              ^
  // [cfe] Operand of null-aware operation '?.' has type 'C' which excludes null
  
    var actual17 = c4 ?.. test2();
  //                  ^^^
  // [analyzer] STATIC_WARNING.INVALID_NULL_AWARE_OPERATOR
  //               ^
  // [cfe] Operand of null-aware operation '?..' has type 'C' which excludes null
  
    Expect.equals(expected4, actual17);
    Expect.equals("test1 called 1 times, test2() called 1 times", c4?.log);
  //                                                                ^^
  // [analyzer] STATIC_WARNING.INVALID_NULL_AWARE_OPERATOR
  //                                                              ^
  // [cfe] Operand of null-aware operation '?.' has type 'C' which excludes null
  
    var actual18 = c4
  //               ^
  // [cfe] Operand of null-aware operation '?..' has type 'C' which excludes null
        ?.. test1
  //    ^^^
  // [analyzer] STATIC_WARNING.INVALID_NULL_AWARE_OPERATOR
  
negative.code: //                                                                ^^
  // [analyzer] STATIC_WARNING.INVALID_NULL_AWARE_OPERATOR
  //                                                              ^
  // [cfe] Operand of null-aware operation '?.' has type 'C' which excludes null.
    CAlias2 c3 = new C();
    var actual10 = c3 ?.. test1;
  //                  ^^^
  // [analyzer] STATIC_WARNING.INVALID_NULL_AWARE_OPERATOR
  //               ^
  // [cfe] Operand of null-aware operation '?..' has type 'C' which excludes null.
    var expected3 = c3;
    Expect.equals(expected3, actual10);
    if (c3 != null) {
  