https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004 Bug 55004 depends on bug 109975, which changed state.
Bug 109975 Summary: error: '(((int*)(&<anonymous>.X::a)) != 0)' is not a constant expression https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109975 What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |DUPLICATE