On Tue, Dec 21, 2021 at 4:40 PM Adrian Moreno via Gcc-help <gcc-help@xxxxxxxxxxx> wrote: > > I'd really appreciate any hint or idea to try to understand this problem. I guess the compiler doesn't like the dereferencing of uninitialized pointers (in the sizeof expressions). I am not 100% sure that this counts as dereferencing, but I would assume so. Because of this the compiler will be free to behave however it likes to.