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struct SomeType {
  SomeType() noexcept; // Performs nontrivial initialization.
  ~SomeType(); // Performs nontrivial finalization.

  void process_item() noexcept(false);
};

void f() {
  SomeType st;
  try {
    st.process_item();
  } catch (...) {
    // Handle error
    throw;
  } // After re-throwing the exception, the destructor is run for st.
} // If f() exits without throwing an exception, the destructor is run for st.