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From: "mail+gnu at tzik dot jp" <gcc-bugzilla@gcc.gnu.org> 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 [thread overview] Message-ID: <bug-98935-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98935 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 = future{}; x;});` causes an internal compiler error. https://wandbox.org/permlink/3jX83p34mVDfBgc1 The compile command was: $ g++ -std=c++20 failcase.cc where g++ was the current trunk (11.0.0). ---- failcase.cc #if __has_include(<coroutine>) #include <coroutine> #elif __has_include(<experimental/coroutine>) #include <experimental/coroutine> 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 = 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*, false, default_hash_traits<tree_node*> >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*)) ../../source/gcc/tree.c:12105 0xf18c82 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*)) ../../source/gcc/tree.c:12340 0xf18ad1 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*)) ../../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*, false, default_hash_traits<tree_node*> >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*)) ../../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*, false, default_hash_traits<tree_node*> >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*)) ../../source/gcc/tree.c:12099 0xf18ad1 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*)) ../../source/gcc/tree.c:12204 0xf187aa walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*)) ../../source/gcc/tree.c:12436 0xf18ad1 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*)) ../../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*, false, default_hash_traits<tree_node*> >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*)) ../../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. Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions.
next reply other threads:[~2021-02-02 15:47 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-02-02 15:47 mail+gnu at tzik dot jp [this message] 2021-09-27 21:09 ` [Bug c++/98935] " delleyves at gmx dot ch 2021-10-01 19:54 ` iains at gcc dot gnu.org 2022-06-28 10:43 ` jakub at gcc dot gnu.org 2023-07-07 9:24 ` rguenth at gcc dot gnu.org 2024-02-01 21:07 ` lozko.roma at gmail dot com
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