Code AnalysisBeginner 60s

Lambda capture by reference outliving its scope

What is the bug in this code?

Starter code

#include <functional>
#include <iostream>

std::function<int()> make() {
    int x = 42;
    return [&x]() { return x; };
}

int main() {
    auto f = make();
    std::cout << f() << '\n';
}

lambda capture dangling

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