[Bug c++/78929] Incorrect implementation of Refining Expression Evaluation Order for Idiomatic C++

[boostcpp at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78929

--- Comment #2 from Ryou Ezoe <boostcpp at gmail dot com> ---
My bad.
§1.10 p18 still said "i++ + i" is undefined.