[Bug c++/106348] c++modules: invalid syntax accepted

[bugzilla.gcc at me dot benboeckel.net via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106348

--- Comment #1 from Ben Boeckel <bugzilla.gcc at me dot benboeckel.net> ---
Forgot to mention: this occurs as of commit
63d182fb86e47323ac50d9368845d712e1f7da89