// warning: address of stack memory associated with local variable 'x' returned [-Wreturn-stack-address]
#include <cstddef>

int* dangling_pointer() {
    int x = 42;
    return &x; // returns address of a local variable
}

int main() {
    int* p = dangling_pointer();
    // Using *p here would be undefined behavior
    (void)p;
    return 0;
}