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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/109337] c++2a test concepts4.C passes when it should fail
Date: Wed, 29 Mar 2023 19:11:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109337

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |NEW
         Resolution|INVALID                     |---

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Christopher Di Bella from comment #3)
> This is apparently a Clang bug: the RHS of `R42c` isn't evaluated because=
 of
> short-circuiting. Apologies for the noise and thanks for helping me work
> through it.

No, clang and GCC disagree even on:
```
template <class Ub> concept A42b =3D true;
template <class Tc> concept R42c =3D A42b<Tc&>;

static_assert (R42c<void>);
```

There is no short-circuting here.=