Attempt to access run-time storage error

Bug type: Language Service

Describe the bug

OS and Version: MacOS Monterey 12.1 (M1 processor)
VS Code Version:
- Version: 1.63.2
- Commit: 899d46d82c4c95423fb7e10e68eba52050e30ba3
- Date: 2021-12-15T09:38:17.605Z (1 mo ago)
- Electron: 13.5.2
- Chromium: 91.0.4472.164
- Node.js: 14.16.0
- V8: 9.1.269.39-electron.0
- OS: Darwin arm64 21.2.0
C/C++ Extension Version: v1.8.0-insiders2
Other extensions you installed (and if the issue persists after disabling them):
- CMake v0.0.17

Even though the program compiles fine on Apple Clang, Clang13, and GCC11 - IntelliSense reports an error in Problems Tab. or if you change values[j] to values[i]:

Minimal example

Here's the most minimal example I could create to reproduce:

#include <array>

template <std::size_t N>
constexpr auto transform(const std::array<float, N>& arr)
{
    std::array<int, N> values;
    for (std::size_t i{0}; const auto& k : arr)
    {
        constexpr auto j = 0;
        values[j] = k;  // change this j to i and you get a different error as well
        ++i;
    }
    return values;
}

int main()
{
    constexpr auto values = transform(std::array{0.f});
}

Expected behavior

There should be no errors in Problems Tab as this C++20 code is perfectly valid.

microsoft / vscode-cpptools

Attempt to access run-time storage error #8673