From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 422F83858D1E; Thu, 14 Jul 2022 17:15:24 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 422F83858D1E From: "johelegp at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/106304] New: [modules] ICE compiling dynamic_cast in constexpr function (in tree_node, at cp/module.cc:9183) Date: Thu, 14 Jul 2022 17:15:24 +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: 13.0 X-Bugzilla-Keywords: rejects-valid X-Bugzilla-Severity: normal X-Bugzilla-Who: johelegp 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 keywords bug_severity priority component assigned_to reporter cc 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: Thu, 14 Jul 2022 17:15:24 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106304 Bug ID: 106304 Summary: [modules] ICE compiling dynamic_cast in constexpr function (in tree_node, at cp/module.cc:9183) Product: gcc Version: 13.0 Status: UNCONFIRMED Keywords: rejects-valid Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: johelegp at gmail dot com CC: johelegp at gmail dot com Target Milestone: --- See https://godbolt.org/z/xz4Mhd8Wc, which Clang accepts: https://godbolt.org/z/saachff5d. mod.cpp: ```C++ export module mod; template struct A : T { constexpr A(T v) : T{v} { } ~A() =3D default; // Fixes GCC. }; struct B { virtual ~B() =3D default; }; export inline constexpr auto x =3D A{B{}}; export constexpr const A* y(const B& b) { return dynamic_cast*>(&b); } ``` test.cpp: ```C++ import mod; static_assert(&x =3D=3D y(x)); int main() { } ``` Output: ``` [ 50%] Building CXX object CMakeFiles/mod.dir/mod.cpp.o mod.cpp:1:8: internal compiler error: in tree_node, at cp/module.cc:9183 1 | export module mod; | ^~~~~~ 0x221f229 internal_error(char const*, ...) ???:0 0x74c10d fancy_abort(char const*, int, char const*) ???:0 0x8fd00f trees_out::tree_node(tree_node*) ???:0 0x8fde5f trees_out::core_vals(tree_node*) ???:0 0x902d6d trees_out::tree_value(tree_node*) ???:0 0x8fcf41 trees_out::tree_node(tree_node*) ???:0 0x8fde5f trees_out::core_vals(tree_node*) ???:0 0x902d6d trees_out::tree_value(tree_node*) ???:0 0x8fcf41 trees_out::tree_node(tree_node*) ???:0 0x8fde5f trees_out::core_vals(tree_node*) ???:0 0x902d6d trees_out::tree_value(tree_node*) ???:0 0x8fcf41 trees_out::tree_node(tree_node*) ???:0 0x8fde5f trees_out::core_vals(tree_node*) ???:0 0x902d6d trees_out::tree_value(tree_node*) ???:0 0x8fcf41 trees_out::tree_node(tree_node*) ???:0 0x8fde5f trees_out::core_vals(tree_node*) ???:0 0x902d6d trees_out::tree_value(tree_node*) ???:0 0x8fcf41 trees_out::tree_node(tree_node*) ???:0 0x8fde5f trees_out::core_vals(tree_node*) ???:0 0x902d6d trees_out::tree_value(tree_node*) ???:0 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. See for instructions. ```=