*array[] is not initialized - Code Analysis Warning C6001

Question

So, I wrote a function which resizes a Two-Dimensional array.

void resizeArray(int **&arr, short &arrSize1, short* &arrSize2, const int &amount)
{
    int** arrTemp = new int*[arrSize1 + 1]; // Creating a 2D array
    for (short i(0); i < arrSize1 + 1; i++) // For each arrTemp[i] an array is created
        arrTemp[i] = new int[(arrSize2[i] == 0 ? 1 : arrSize2[i])];

    for (short i(0); i < arrSize1; i++) // Copying old values to the new BIGGER temp array
        for (short i2(0); i2 < (arrSize2[i] == 0 ? 1 : arrSize2[i]); i2++)
            arrTemp[i][i2] = arr[i][i2];

    for (short i(0); i < arrSize1; i++)
        delete[] arr[i];
    if (arrSize1) // The first time this function is ran arrSize1 is 0 and arr is a nullptr
    {
        delete[] arr;
        arr = nullptr;
    }

    arr = new int*[arrSize1 + 1]; // Creating the new BIGGER arr
    for (short i(0); i < arrSize1 + 1; i++) // Creating the sub-arrays(or second dimension)
        arr[i] = new int[(arrSize2[i] == 0 ? 1 : arrSize2[i])];

    for (short i(0); i < arrSize1 + 1; i++) // Copying from arrTemp to arr
        for (short i2(0); i2 < (arrSize2[i] == 0 ? 1 : arrSize2[i]); i2++)
            arr[i][i2] = arrTemp[i][i2];

    for (short i(0); i < arrSize1 + 1; i++) // Deleting arrTemp
        delete[] arrTemp[i];
    delete[] arrTemp;
    arrTemp = nullptr;

    for (short i(0); i < (arrSize2[arrSize1] == 0 ? 1 : arrSize2[arrSize1]); i++)
        arr[arrSize1][i] = amount; // Setting the newly created sub-array to a value
}

The code above works perfectly - the only problem is when I run Code Analysis it says Warning (Memory Safety) C6001 - '*arrTemp[i]' is not initialized.

I don't quite understand why it thinks that it isn't initialized - I also have function like this for 3D arrays(of course everything with dynamic memory allocation) and it doesn't show any problem there.

I tried fixing it several times, but no avail: 1. Initializing to nullptr after the new int*[] is done; 2. Initializing the values of the 2D array to 0 after the loop is done; 3. A few other stupid things.....

So, is it bug in Visual Studio(which I'm using by the way :)) or is it something in my code that I can't find out?

P.S. Added comments;

Answer 1

Your code generates this warning because when you build your arrTemp you allocate arraySize1 + 1 sub-arrays

for (short i(0); i < arrSize1 + 1; i++)
    arrTemp[i] = new int[(arrSize2[i] == 0 ? 1 : arrSize2[i])];

but assign meaningful values only to arraySize1 of those sub-arrays

for (short i(0); i < arrSize1; i++)
    for (short i2(0); i2 < (arrSize2[i] == 0 ? 1 : arrSize2[i]); i2++)
        arrTemp[i][i2] = arr[i][i2];

After that all entries like arrTemp[arrSize1][i2] still contain garbage.

Later you do

for (short i(0); i < arrSize1 + 1; i++)
    for (short i2(0); i2 < (arrSize2[i] == 0 ? 1 : arrSize2[i]); i2++)
        arr[i][i2] = arrTemp[i][i2];

which attempts to read garbage from arrTemp[arrSize1][i2]. Hence the warning.