`<algorithm>`: `ranges::minmax` initializes `minmax_result` with the moved value

[hewillk]

STL/stl/inc/algorithm

Line 10046 in 04ee878

minmax_result<_Vty> _Found = {static_cast<_Vty>(*_UFirst), static_cast<_Vty>(*_UFirst)};

This is basically GCC PR104858, which has been resolved in libstdc++.

#include <algorithm>
#include <string>
#include <vector>
#include <iostream>

int main() {
  std::vector<std::string> v{"1", "0"};
  auto [min, max] = std::ranges::minmax(
    std::ranges::subrange{
      std::make_move_iterator(v.begin()),
      std::make_move_iterator(v.end())});
  std::cout << min << " " << max << "\n"; // only print 0 in MSVC-STL
}

https://godbolt.org/z/nM5a1Y9Gr

[CaseyCarter]

<algorithm>: ranges::minmax double dereferences _UFirst

This is not a bug.

std::cout << min << " " << max << "\n"; // only print 0 in MSVC-STL

This is a bug.

[hewillk]

<algorithm>: ranges::minmax double dereferences _UFirst

This is not a bug.

Sorry, I just kept the original title, which doesn't describe the problem properly. Updated.