https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103524 Bug 103524 depends on bug 106348, which changed state.
Bug 106348 Summary: c++modules: invalid syntax accepted https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106348 What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |FIXED