https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64883
--- Comment #8 from howarth at bromo dot med.uc.edu --- (In reply to Iain Sandoe from comment #7) Certainly getting the current GCC manual in sync with this new restriction and emitting a clear warning in the gcc 5.0 release compiler would get the issue more traction with upstream developers.