With GCC trunk, the following minimal usage of std::generator results in incorrect code:
```cpp
#include <generator>
#include <print>
#include <vector>

std::generator<int> get_seq()
{
    std::vector<int> data_{1, 2, 3};
    for (auto item : data_)
        co_yield item;
}

int main()
{
    for (auto item : get_seq())
        std::println("{}", item);
}
```
The expected result, and what is outputted by GCC 14.2, is "1 2 3" on three lines. However, with the GCC trunk, only a single 0 is outputted. See https://godbolt.org/z/fE1593c9h.