From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id CD8E3386F46D; Tue, 2 Feb 2021 15:47:16 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org CD8E3386F46D From: "mail+gnu at tzik dot jp" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/98935] New: [coroutines] co_await on statement expressions causes ICE Date: Tue, 02 Feb 2021 15:47:16 +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: 11.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: mail+gnu at tzik dot jp 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: Tue, 02 Feb 2021 15:47:16 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98935 Bug ID: 98935 Summary: [coroutines] co_await on statement expressions causes ICE Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: mail+gnu at tzik dot jp Target Milestone: --- In a repro case below, `co_await ({auto x =3D future{}; x;});` causes an in= ternal compiler error. https://wandbox.org/permlink/3jX83p34mVDfBgc1 The compile command was: $ g++ -std=3Dc++20 failcase.cc where g++ was the current trunk (11.0.0). ---- failcase.cc #if __has_include() #include #elif __has_include() #include namespace std { using namespace std::experimental; } #endif struct future { struct promise_type { void return_void() {} std::suspend_always initial_suspend() noexcept { return {}; } std::suspend_always final_suspend() noexcept { return {}; } void unhandled_exception() {} future get_return_object() { return {}; } }; bool await_ready() { return false; } void await_suspend(std::coroutine_handle<>) {} void await_resume() {} }; future failcase() { co_await ({auto x =3D future{}; x;}); } ---- And its backtrace was: ---- prog.cc: In function 'future failcase()': prog.cc:25:1: internal compiler error: Segmentation fault 25 | } | ^ 0xca67ef crash_signal ../../source/gcc/toplev.c:327 0xf1866b walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set >*)) ../../source/gcc/tree.c:12105 0xf18c82 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set >*)) ../../source/gcc/tree.c:12340 0xf18ad1 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set >*)) ../../source/gcc/tree.c:12204 0x680293 transform_local_var_uses ../../source/gcc/cp/coroutines.cc:1903 0xf1865b walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set >*)) ../../source/gcc/tree.c:12099 0x680293 transform_local_var_uses ../../source/gcc/cp/coroutines.cc:1903 0xf1865b walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set >*)) ../../source/gcc/tree.c:12099 0xf18ad1 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set >*)) ../../source/gcc/tree.c:12204 0xf187aa walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set >*)) ../../source/gcc/tree.c:12436 0xf18ad1 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set >*)) ../../source/gcc/tree.c:12204 0x680293 transform_local_var_uses ../../source/gcc/cp/coroutines.cc:1903 0xf1865b walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set >*)) ../../source/gcc/tree.c:12099 0x680a27 build_actor_fn ../../source/gcc/cp/coroutines.cc:2085 0x6832a5 morph_fn_to_coro(tree_node*, tree_node**, tree_node**) ../../source/gcc/cp/coroutines.cc:4750 0x6b4f87 finish_function(bool) ../../source/gcc/cp/decl.c:17155 0x76da42 cp_parser_function_definition_after_declarator ../../source/gcc/cp/parser.c:29941 0x76eb9c cp_parser_function_definition_from_specifiers_and_declarator ../../source/gcc/cp/parser.c:29854 0x76eb9c cp_parser_init_declarator ../../source/gcc/cp/parser.c:21564 0x74d5b4 cp_parser_simple_declaration ../../source/gcc/cp/parser.c:14381 Please submit a full bug report, with preprocessed source if appropriate. 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