https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87192
--- Comment #3 from Rich Felker <bugdal at aerifal dot cx> --- Adding a second member int b; does not make it work. I'm not sure why the end of the struct should be special anyway; is it for the sake of supporting code with erroneous alternatives to flexible array members? Shouldn't "=2" disable that exception?