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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/95725] Confusing error diagnostic in an invalid template
Date: Wed, 17 Jun 2020 23:49:42 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95725

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mpolacek at gcc dot gnu.org

--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #3)
> The diagnostic is usually for false positive/negative warnings or wrong
> information in diagnostic messages.  It's not normally used for internal
> compiler errors.  But I don't see an ICE on trunk with this test case, ju=
st
> errors (so diagnostic would seem appropriate).  At the same time, the lat=
est
> GCC output seems reasonable.  Clang prints something similar:
>=20
> pr95725.C:1:20: error: expected expression
> template <decltype(=3D ;
>                    ^
> pr95725.C:1:22: error: expected expression
> template <decltype(=3D ;
>                      ^
> pr95725.C:1:22: error: expected ',' or '>' in template-parameter-list
> pr95725.C:1:22: warning: declaration does not declare anything
>       [-Wmissing-declarations]
> 1 warning and 3 errors generated.
>=20
> I'm not sure there's a lot to improve here.

Agreed.  As I said in bug 95723, I'm on the verge of closing these reports =
as
WONFIX or INVALID or something similar.=