File: main.cpp

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#include <atomic>

// Define a Parent and Child struct that can point to each other.
class Parent;
struct Child {
  // This should point to the parent which in turn owns this
  // child instance. This cycle should not cause LLDB to infinite loop
  // during printing.
  std::atomic<Parent*> parent{nullptr};
};
struct Parent {
  Child child;
};

struct S {
    int x = 1;
    int y = 2;
};

int main ()
{
    std::atomic<S> s;
    s.store(S());
    std::atomic<int> i;
    i.store(5);

    Parent p;
    // Let the child node know what its parent is.
    p.child.parent = &p;

    return 0; // Set break point at this line.
}