[Bug c++/91780] Discrepancy between gcc 7.4, through 9.2, compared to clang.

[mikael.p.persson at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91780

--- Comment #1 from Mikael Persson <mikael.p.persson at gmail dot com> ---
To clarify it also does not work in gcc trunk.