Segmentation Fault When Accessing Vector Elements After Resizing in C++
I've searched everywhere and can't find a clear answer. I'm working with a segmentation fault when I attempt to access elements of a `std::vector` after resizing it. I'm using C++17 and compiling with g++. The scenario arises after I call `vec.resize(new_size)` where `new_size` is less than the current size of the vector. I've tried using `vec.shrink_to_fit()` before accessing the elements, but that hasn't resolved the scenario. Here's a simplified version of my code: ```cpp #include <iostream> #include <vector> int main() { std::vector<int> vec = {1, 2, 3, 4, 5}; std::cout << "Original size: " << vec.size() << std::endl; // Resize the vector to a smaller size vec.resize(3); std::cout << "Resized size: " << vec.size() << std::endl; // This line causes a segmentation fault std::cout << vec.at(4) << std::endl; // Accessing an out-of-bounds index } ``` When I run this code, it compiles without warnings, but it crashes at runtime with a segmentation fault when I try to access `vec.at(4)`. I expected it to throw an `std::out_of_range` exception instead. I've confirmed that my vector size has indeed changed, so I'm puzzled about why I'm still able to access an invalid index without proper behavior handling. Any insights into what's going wrong here would be appreciated! I'm working on a CLI tool that needs to handle this. Any ideas what could be causing this?