https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101873
--- Comment #4 from Fedor Chelnokov <fchelnokov at gmail dot com> --- If this question is to me, then actually I am not absolutely sure. I initially thought that GCC was right in this code example. But later a high reputy C++ expert from stackoverflow dissuaded me. According to him, the code example was valid in C++17 and remains valid in C++20. C++ standard is so complex nowdays.
