https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004 Bug 55004 depends on bug 70170, which changed state.
Bug 70170 Summary: [6 regression] bogus not a constant expression error comparing pointer to array to null https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70170 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED