https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103524 Bug 103524 depends on bug 119863, which changed state.
Bug 119863 Summary: [15 Regression][modules] Bogus conflicting friend template declaration https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119863 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED