On Saturday, April 22, 2023, Jakub Jelinek <jakub@redhat.com> wrote:
> On Sat, Apr 22, 2023 at 11:30:24AM +0800, haochen.jiang via Gcc-patches
wrote:
>> On Linux/x86_64,
>>
>> 03cebd304955a6b9c5607e09312d77f1307cc98e is the first bad commit
>> commit 03cebd304955a6b9c5607e09312d77f1307cc98e
>> Author: Jason Merrill <jason@redhat.com>
>> Date:   Tue Apr 18 21:32:07 2023 -0400
>>
>>     c++: fix 'unsigned typedef-name' extension [PR108099]
>>
>> caused
>>
>> FAIL: std/ranges/iota/max_size_type.cc execution test
>
> That is mentioned in
> https://gcc.gnu.org/pipermail/gcc-patches/2023-April/616439.html
> as known problem.  I think the test should use std::make_signed<rep_t>
> instead of signed rep_t

It's already testing non-public implementation details, it could just use
#if and use signed __int128 or signed long long as appropriate.

> which it uses, but as Jason mentioned,
> it reveals further problems that need to be looked at.
>
>         Jakub
>
>