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

[hp at gcc dot gnu.org]

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

--- Comment #1 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
Tested gcc-14.2 and trunk at r15-7991-g503f10e34dcd
No other options than -O0 / -O1 are required to reproduce.