https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61469
--- Comment #14 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Thomas Mercier from comment #13)
> Was this feature meant to be protected by -std=c23? It doesn't appear to be
> in GCC 13:
>
> /tmp$ cat test.c
> enum node_stat_item : unsigned {
> NR_LRU_BASE = -1,
> NR_INACTIVE_ANON = NR_LRU_BASE, /* must match order of LRU_[IN]ACTIVE */
> NR_ACTIVE_ANON, /* " " " " " */
> NR_INACTIVE_FILE,
> };
>
> int main()
> {}
> /tmp$ gcc --version
> gcc (Debian 13.2.0-10) 13.2.0
> Copyright (C) 2023 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions. There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>
> /tmp$ gcc -std=c11 test.c
> test.c:2:23: error: enumerator value outside the range of underlying type
> 2 | NR_LRU_BASE = -1,
> | ^
> test.c:4:9: error: overflow in enumeration values
> 4 | NR_ACTIVE_ANON, /* " " " " "
> */
> |
Note that is the correct error even for C23. clang also errors out the similar
way:
```
<source>:5:2: error: enumerator value 4294967296 is not representable in the
underlying type 'unsigned int'
5 | NR_ACTIVE_ANON, /* " " " " "
*/
| ^
```
