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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++/109823] ICE with trailing return of decltype of a fold
 expression in nested generic variadic lambda
Date: Fri, 12 May 2023 07:58:30 +0000
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X-Bugzilla-Keywords: ice-on-valid-code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109823

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Internal segmentation fault |ICE with trailing return of
                   |for trailing return with    |decltype of a fold
                   |doubly expanded variadic    |expression in nested
                   |pack                        |generic variadic lambda
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2023-05-12
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced testcase:
int f(int){return 0;}
int main()
{
    auto tensor_product =3D [](const auto &...arguments)
    {
        return [&](auto &&... inputs) -> decltype((... * arguments(inputs)))
        {
            return 0;
        };
    };
    tensor_product(f)(1);
}=