http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51731
--- Comment #4 from M.L. Hekkelman <m.hekkelman at cmbi dot ru.nl> 2012-01-02 19:08:10 UTC --- Beste jakub, maandag 2 januari 2012, 18:10:17, schreef je: > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51731 > Jakub Jelinek <jakub at gcc dot gnu.org> changed: > What |Removed |Added > ---------------------------------------------------------------------------- > Status|UNCONFIRMED |RESOLVED > CC| |jakub at gcc dot gnu.org > Resolution| |INVALID > --- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-01-02 > 17:10:17 UTC --- > Having a zero-sized array at the end of a struct is surely a commonly used > technique, close to standard flexible array members, but that is not what you > are doing. Trying to reference data.e[-1] through data.e[-9] is of course not > valid C++ (nor C) when e is an array (it might be valid if e was a pointer and > pointed into the middle of some array). Following your logic, if I rewrite the code from: return data.e[-1]; to int* ep = data.e; return ep[-1]; It would be valid, right? And you still believe the bug report is invalid?
