https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004 Bug 55004 depends on bug 115772, which changed state.
Bug 115772 Summary: static_assert rejected constexpr member function with non-constexpr this https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115772 What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |DUPLICATE