https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64372
--- Comment #11 from Shafik Yaghmour <yaghmour.shafik at gmail dot com> --- Bumping, it has been a while. I ran into this reviewing [diff.cpp11.expr] https://timsong-cpp.github.io/cppwp/n4659/diff.cpp11.expr and noticed the code in the example similar to the reduced sample fails to compile with current gcc trunk godbolt: https://godbolt.org/z/Ihm9Ps
