From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 689E33858002; Wed, 18 May 2022 09:15:53 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 689E33858002 From: "namniav at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/105644] New: ICE in a fold expression with a requires expression: in iterative_hash_template_arg, at cp/pt.cc:1805 Date: Wed, 18 May 2022 09:15:53 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Version: 12.1.1 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: namniav 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: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter target_milestone Message-ID: 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 18 May 2022 09:15:53 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105644 Bug ID: 105644 Summary: ICE in a fold expression with a requires expression: in iterative_hash_template_arg, at cp/pt.cc:1805 Product: gcc Version: 12.1.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: namniav at gmail dot com Target Milestone: --- https://godbolt.org/z/8qehadhbT =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D #include #include #include #include template concept tuple_like =3D=20 [] (std::index_sequence) { return ((requires(T t) { { get(t) } -> std::convertible_to&>; }) && ...); } (std::make_index_sequence>{}); static_assert(tuple_like>); =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D Both 12.1 and current trunk version on godbolt.org crashed. There's no issue if `std::tuple_element_t&` is replaced with `int&`. Compiler output: : In instantiation of ')> [with l= ong unsigned int ...I =3D {0}; std::index_sequence =3D std::integer_sequence]': :13:7: required from here :11:23: internal compiler error: in iterative_hash_template_arg, at cp/pt.cc:1805 11 | { get(t) } -> std::convertible_to&>; |=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 0x2204919 internal_error(char const*, ...) ???:0 0x744dd3 fancy_abort(char const*, int, char const*) ???:0 0x99a843 iterative_hash_template_arg(tree_node*, unsigned int) ???:0 0x7da898 sat_hasher::hash(sat_entry*) ???:0 0x7d52c7 satisfaction_cache::satisfaction_cache(tree_node*, tree_node*, sat_info) ???:0 0x7d9c2a constraints_satisfied_p(tree_node*, tree_node*) ???:0 0x9b3ffe do_auto_deduction(tree_node*, tree_node*, tree_node*, int, auto_deduction_context, tree_node*, int) ???:0 0x7d7ce2 tsubst_requires_expr(tree_node*, tree_node*, int, tree_node*) ???:0 0x9dd888 tsubst_pack_expansion(tree_node*, tree_node*, int, tree_node*) ???:0 0x9c8517 instantiate_decl(tree_node*, bool, bool) ???:0 0x864c7e maybe_instantiate_decl(tree_node*) ???:0 0x866758 mark_used(tree_node*, int) ???:0 0x77a52b build_op_call(tree_node*, vec**, int) ???:0 0xa31a87 finish_call_expr(tree_node*, vec**, b= ool, bool, int) ???:0 0x7d9c88 evaluate_concept_check(tree_node*) ???:0 0x7c50ec maybe_constant_value(tree_node*, tree_node*, bool) ???:0 0xa3dafd finish_static_assert(tree_node*, tree_node*, unsigned int, bool, b= ool) ???:0 0x98c15d c_parse_file() ???:0 0xb20141 c_common_parse_file() ???:0 ```=