From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
 id 9E3023836E6C; Tue, 31 May 2022 23:45:42 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 9E3023836E6C
From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/105797] [11/12/13 Regression] Internal compiler error:
 Segmentation fault ( fn_type_unification ->
 satisfaction_cache::satisfaction_cache -> iterative_hash_template_arg )
Date: Tue, 31 May 2022 23:45:42 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 12.1.0
X-Bugzilla-Keywords: ice-on-valid-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: mpolacek at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 11.4
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-105797-4-DlsTYPRpv3@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-105797-4@http.gcc.gnu.org/bugzilla/>
References: <bug-105797-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Tue, 31 May 2022 23:45:42 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105797

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
// PR c++/105797

namespace std {
template <int __v> struct integral_constant {
  static constexpr int value =3D __v;
};
template <typename _Tp> struct decay { typedef _Tp type; };
template <typename _Tp> using decay_t =3D typename decay<_Tp>::type;
template <typename>
constexpr bool is_integral_v =3D integral_constant<true>::value;
template <typename _Tp>
concept integral =3D is_integral_v<_Tp>;
} // namespace std
template <typename> struct AStruct { using value_type =3D int; };
template <typename T_>
void fc1(AStruct<T_> v) requires
    std::integral<typename std::decay_t<decltype(v)>::value_type>;
template <typename T1_, typename T2_>
void fc2(AStruct<T1_> v1, T2_) requires
    std::integral<typename std::decay_t<decltype(v1)>::value_type>;
AStruct<int> test_v1, test2_v;
int test_v2;
void test() { fc2(test_v1, test_v2); }
void test2() { fc1(test2_v); }=