https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86465
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- Possibly related to PR 86485 (just a guess, I haven't investigated).
- [Bug c++/86465] New: C++17 <optional> trigge... proski at gnu dot org
- [Bug c++/86465] C++17 <optional> trigge... redi at gcc dot gnu.org
