The Beauty of the House is immeasurable; its Kindness infinite.

Piranesi is a speculative literary fiction novel written by Susanna Clarke in 2020.

The novel is written as a journal belonging to “Piranesi”, who lives inside a seemingly endless labyrinth called “The House”. The novel throws the reader right into the middle of one of his journal entries without explaining why Piranesi is in the House, or how he reached there in the first place.

Consider the following code snippet:

 1#include <iostream>
 2
 3int GetInt() {
 4    int x = 1;
 5    return x;
 6}
 7
 8int main() {
 9    const int& x = GetInt();
10    std::cout << x << std::endl;
11    return 0;
12}

In particular, pay attention to line #9. Is it guaranteed to be safe?