libtbb_bug.cpp

#include <numeric>
#include <string>
#include <ranges>
#include <execution>
#include <iterator>
#include <vector>

struct Output
{
    int32_t serial;
    std::string name;
    int32_t count;
};

int main()
{
    std::vector<int32_t> vec_iter = {0, 1};
    std::vector<Output> output_list(vec_iter.size());
    // mutex guard is not required as each element in vec_iter will be unique,
    // and the output_list is not std::vector<bool>
    std::for_each(std::execution::par, vec_iter.begin(), vec_iter.end(), [&](int32_t elem)
                  { output_list[elem] = {1, "A", 1000}; });
    return 0;
}