C++20 Constexpr virtual not compiling

Shouldn't this compile under C++20 on the latest versions of GCC and Clang?

I know that it is not yet supported on Visual Studio C++ compiler.

However, according to this list: https://en.cppreference.com/w/cpp/compiler_support it should have worked with no problems on GCC and Clang.

#include <iostream>

struct Base {
    constexpr virtual ~Base() noexcept = default;

    [[nodiscard]] constexpr virtual int
    get_value() const noexcept = 0;

struct Derived
    : Base {
    [[nodiscard]] constexpr virtual int
    get_value() const noexcept override {
        return 5;

main() {

    constexpr Derived a;
    constexpr Base const & b = a;
    constexpr auto c = b.get_value();

    std::cout << c << '\n';

    return 0;

Read more here: https://stackoverflow.com/questions/64414308/c20-constexpr-virtual-not-compiling

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