使用std::cin会导致std::vector::push_back在msvc上失败，但在clang上不会失败

#include <iostream>
#include <vector>

int main() {
    std::vector<int> vec;
    int num;

    // 清除输入缓冲区
    std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');

    std::cout << "Enter numbers (enter a non-integer to stop): ";
    while (std::cin >> num) {
        vec.push_back(num);
    }

    std::cout << "Vector contents: ";
    for (const auto& val : vec) {
        std::cout << val << " ";
    }
    std::cout << std::endl;

    return 0;
}

#include <iostream>
#include <vector>
#include <string>

int main() {
    std::vector<int> vec;
    std::string line;

    std::cout << "Enter numbers separated by spaces (enter a non-integer to stop): ";
    while (std::getline(std::cin, line)) {
        try {
            size_t pos = 0;
            while ((pos = line.find(' ')) != std::string::npos) {
                vec.push_back(std::stoi(line.substr(0, pos)));
                line.erase(0, pos + 1);
            }
            if (!line.empty()) {
                vec.push_back(std::stoi(line));
            }
        } catch (const std::invalid_argument& e) {
            break;
        } catch (const std::out_of_range& e) {
            std::cerr << "Number out of range!" << std::endl;
        }
    }

    std::cout << "Vector contents: ";
    for (const auto& val : vec) {
        std::cout << val << " ";
    }
    std::cout << std::endl;

    return 0;
}