clang 同义反复常数超出范围比较警告

标题：使用Clang检测超出范围的同义反复常数的警告

c++
#include 
int sumArray(int arr[], int length) {
    int sum = 0;
    for (int i = 0; i < length; i++) {
        sum += arr[i];
    }
    return sum;
}
int main() {
    int arr[] = {1, 2, 3, 4, 5};
    int length = 5;
    int result = sumArray(arr, length);
    std::cout << "Sum: " << result << std::endl;
    return 0;
}

clang++ -Wall -Wextra -Wconversion -Wsign-conversion -o program program.cpp

warning: implicit conversion from negative value '-1' of type 'int' to a smaller unsigned type 'int' [-Wsign-conversion]
    int result = sumArray(arr, length);
                                ^~~~~~