Error debugging `The name 't' doe not exist in current context`

I faced the problem that I cannot look at the contents of variables under debugging, for example List<int> t1 int[] t2 and int t3 . Error reported: The name 't' doe not exist in current context . Variables are declared and then initialized through out inside another function. There they are really initialized. Purely for checking manually assigned values int[] t2 = new[] {5, 6, 7}; and still the same error when you look at them under debugging. However, the data itself in the variables are present! I make this conclusion based on the fact that if you output them to the foreach (var i in t) Debug.Log(i); console foreach (var i in t) Debug.Log(i); then they are output normally. Tell me how to solve the problem?

UPD: Comrades ... t error message was written intentionally, in order to generalize errors to each of the variables and not to write: "... for example List<int> t1 int[] t2 and int t3 . Errors are reported: The name 't1' does not exist in current context. , The name 't2' does not exist in current context. , The name 't3' does not exist in current context. "respectively. But still I had to write it!

UPD2: The code is as follows:

 private IEnumerator Update() { yield return null; while (true) { if (!_sourceDataIsReady) yield return null; _sourceDataIsReady = false; // кое-что делаю... bool chessboardFound; Point2f[] corners; chessboardFound = Cv2.FindChessboardCorners(_matGrayFrame, _pattern.size, out corners, ChessboardFlags.FastCheck); // вот здесь, после выполнения функции, // не было видно переменных chessboardFound и corners // и снова делаю что-то } } 

For the test I used the following code:

 private IEnumerator Update() { yield return null; while (true) { List<int> t1 = new List<int>() {5,6,7}; int[] t2 = new [] {5,6,7}; int t3 = 5 for (var i=0; i<3; i++){ Debug.Log($"List i: {t1[i]}"); Debug.Log($"Array i: {t2[i]}"); } Debug.Log($"Int: {t3}"); } }