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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++/104410] [11/12 Regression] Internal error using
 default-initialized constexpr bool in requires clause
Date: Sun, 06 Feb 2022 23:53:49 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104410

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
here is slightly more reduced:
constexpr bool use_func_v{};
struct func_obj
{
    template<class T> requires use_func_v
    void operator()(T);
};
template <typename t, typename ...args>
concept tt =3D requires {t{}(args{}...);};
constexpr bool bar{tt<func_obj, char>};=