https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69550
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> --- The code is nonsense, what's it even supposed to do? It would be invalid in C (where flexible arrays are actually standard) because flexible arrays can only be the last member, *and* because apart from the flexible arrays it's an otherwise empty struct. It's useless, and only compiled by accident. Allowing it with -fpermissive might make sense though, as that flag allows all kinds of terrible rubbish to compile.
