CPP 控制台应用程序退出而不提供错误信息

Question

When I compile and run the below piece of code the exe crashes yet doesn't provide information of any sort regarding why it crashed. (Seg faults etc. not reported). Here is the sample code that I tried:

#include <iostream>
#include <vector>

using namespace std;

int main() {
    vector <int> values;
    int temp = values.back();
    cout << temp << endl;
    return 0;
}

The same piece of code when compiled and run-on Linux produce a seg fault. Is there something to be configured specifically in windows to let console applications generate information regarding runtime errors?

Answer 1

Calling std::vector::back on an empty vector is undefined behavior . The compiler or runtime aren't required to emit a diagnostic. There might be a tool or sanitizer that could help depending on the compiler you're using.

Answer 2

Is there something to be configured specifically in windows to let console applications generate information regarding runtime errors?

The problem is that value.back() causes undefined behavior (because your vector is empty). The effect of undefined behavior is undefined. It might result in a seg fault, but also could just exit the application. You can't enforce a segfault for that, and not really enforce a crash.

Using static analyzers and increasing the warning level can help in certain cases. But there is no way to detect all possible errors.