[Bug c++/119319] [14/15 Regression] incorrect error: invalid use of incomplete type

[hp at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119319

--- Comment #8 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
(In reply to Hans-Peter Nilsson from comment #1)
> No other options than -O0 / -O1 are required to reproduce.

Oops, make that "no other options than '-O1 std=c++20'".