https://gcc.gnu.org/bugzilla/show_bug.cgi?id=24639 Bug 24639 depends on bug 70991, which changed state.
Bug 70991 Summary: Uninitialized class allowed if it came from self-assignment, or a member function https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70991 What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |DUPLICATE