使用 sanitize工具检查内存为题

//  g++ str_view_test.cpp -fsanitize=address -std=c++17 -o s
#include 

std::string f1() {
    std::string val;
    val += "123";
    val += "456";
    return val;
}

void f2(std::string_view val) { std::cout << val << std::endl; }

int main() {
    //std::string_view ss  = f1(); // stack-use-after-scope
    //f2(ss);
    f2(f1()); //correct
    return 0;
}

https://docs.microsoft.com/en-us/cpp/sanitizers/error-heap-buffer-overflow?view=msvc-160