Segmentation Fault When Accessing std::array Inside Custom Iterator in C++17
I'm working on a project and hit a roadblock. I'm currently implementing a custom iterator for a `std::array` in C++17, and I'm working with a segmentation fault when I try to access the elements of the array. My implementation extends the iterator functionality to include a method for accessing the next element. The goal is to make the iterator behave similarly to a standard iterator but with additional features for my use case. Here's the relevant code for my custom iterator: ```cpp #include <array> #include <iostream> #include <iterator> template<typename T, std::size_t N> class CustomIterator { public: using value_type = T; using difference_type = std::ptrdiff_t; using pointer = T*; using reference = T&; using iterator_category = std::forward_iterator_tag; CustomIterator(std::array<T, N>& arr, std::size_t pos) : arr(arr), pos(pos) {} reference operator*() const { return arr[pos]; } CustomIterator& operator++() { ++pos; return *this; } bool operator!=(const CustomIterator& other) const { return pos != other.pos; } // Custom method to get the next element reference next() { if (pos + 1 >= N) throw std::out_of_range("Exceeds array bounds"); return arr[pos + 1]; } private: std::array<T, N>& arr; std::size_t pos; }; int main() { std::array<int, 5> myArray = {1, 2, 3, 4, 5}; CustomIterator<int, 5> it(myArray, 0); std::cout << "Current: " << *it << std::endl; std::cout << "Next: " << it.next() << std::endl; // This line causes a segfault return 0; } ``` When I run this code, I get a segmentation fault at the `next()` method call. I suspect it might be related to how I'm managing the position index and accessing the array elements. I've already added boundary checks in the `next()` method, but it still crashes. I've also tried debugging with different array sizes and positions, but the scenario continues. Can anyone guide to identify what might be causing this segmentation fault? Is there something I'm overlooking regarding the management of the array's lifecycle or the iterator's state? This is part of a larger CLI tool I'm building. Has anyone else encountered this?