https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93848
--- Comment #10 from Martin Sebor <msebor at gcc dot gnu.org> ---
An array is implicitly converted to a pointer; it's not an lvalue. But I think
we're splitting hairs. I agree we want a warning for passing past-the-end
pointers to functions that might inadvertently dereference it; I plan to
implement it for GCC 11.
The reference in
int a[1][4];
printf("%p\n", (void *)&a[1][1]);
is of course undefined, but when the warning sees the address-of operator it
allows off-by-one indices. That's necessary only for the rightmost index but
not otherwise. The missing warning here is the subject of pr84079. I have a
simple fix that handles this case.
