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 2265D3858004; Mon, 29 Mar 2021 08:10:23 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 2265D3858004
From: "hewillk at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/99811] ICE: tree check: accessed elt 2 of 'tree_vec' with 1
 elts in tsubst_pack_expansion, at cp/pt.c:13002
Date: Mon, 29 Mar 2021 08:10:22 +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: 11.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: hewillk at gmail dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-99811-4-wjPsHhWVIx@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-99811-4@http.gcc.gnu.org/bugzilla/>
References: <bug-99811-4@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: Mon, 29 Mar 2021 08:10:23 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99811

--- Comment #1 from =E5=BA=B7=E6=A1=93=E7=91=8B <hewillk at gmail dot com> =
---
same form with the different error message:

https://godbolt.org/z/hE9n6eEMT

#include <concepts>

template <typename... Ts>
auto f(Ts...) {
  return []<std::same_as<Ts> auto> {};
}

int main() {
  f(0).template operator()<0>();
}


<source>:9:30: internal compiler error: tree check: accessed elt 1 of
'tree_vec' with 0 elts in hash, at cp/constraint.cc:2522
    9 |   f(0).template operator()<0>();
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
0x1cfb7f9 internal_error(char const*, ...)
        ???:0
0x67bcb2 tree_vec_elt_check_failed(int, int, char const*, int, char const*)
        ???:0
0x73fc50 sat_hasher::hash(sat_entry*)
        ???:0
0x73b2b7 satisfaction_cache::satisfaction_cache(tree_node*, tree_node*,
sat_info)
        ???:0
0x73efca constraints_satisfied_p(tree_node*, tree_node*)
        ???:0
0x909bbe do_auto_deduction(tree_node*, tree_node*, tree_node*, int,
auto_deduction_context, tree_node*, int)
        ???:0
0x954187 fn_type_unification(tree_node*, tree_node*, tree_node*, tree_node*
const*, unsigned int, tree_node*, unification_kind_t, int, conversion**, bo=
ol,
bool)
        ???:0
0x6dec99 build_new_method_call(tree_node*, tree_node*, vec<tree_node*, va_g=
c,
vl_embed>**, tree_node*, int, tree_node**, int)
        ???:0
0x8e12ad c_parse_file()
        ???:0
0xa600a2 c_common_parse_file()
        ???:0
Please submit a full bug report,
with preprocessed source if appropriate.=