https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004 Bug 55004 depends on bug 64954, which changed state.
Bug 64954 Summary: GCC incorrectly rejects constexpr variable initialization. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64954 What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED