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* [Bug c++/98935] New: [coroutines] co_await on statement expressions causes ICE
@ 2021-02-02 15:47 mail+gnu at tzik dot jp
2021-09-27 21:09 ` [Bug c++/98935] " delleyves at gmx dot ch
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: mail+gnu at tzik dot jp @ 2021-02-02 15:47 UTC (permalink / raw)
To: gcc-bugs
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.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/98935] [coroutines] co_await on statement expressions causes ICE
2021-02-02 15:47 [Bug c++/98935] New: [coroutines] co_await on statement expressions causes ICE mail+gnu at tzik dot jp
@ 2021-09-27 21:09 ` delleyves at gmx dot ch
2021-10-01 19:54 ` iains at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: delleyves at gmx dot ch @ 2021-09-27 21:09 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98935
--- Comment #1 from Yves Delley <delleyves at gmx dot ch> ---
The provided fail-case seems to compile fine on godbolt.org 10.2, but started
to ICE with 10.3, as well as 11.1 and 11.2.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/98935] [coroutines] co_await on statement expressions causes ICE
2021-02-02 15:47 [Bug c++/98935] New: [coroutines] co_await on statement expressions causes ICE mail+gnu at tzik dot jp
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
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: iains at gcc dot gnu.org @ 2021-10-01 19:54 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98935
Iain Sandoe <iains at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |10.4
Ever confirmed|0 |1
Last reconfirmed| |2021-10-01
Status|UNCONFIRMED |NEW
--- Comment #2 from Iain Sandoe <iains at gcc dot gnu.org> ---
statement expressions have never been handled explicitly (deferred since they
are an extension) .. however, it is planned to support them,
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/98935] [coroutines] co_await on statement expressions causes ICE
2021-02-02 15:47 [Bug c++/98935] New: [coroutines] co_await on statement expressions causes ICE mail+gnu at tzik dot jp
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
4 siblings, 0 replies; 6+ messages in thread
From: jakub at gcc dot gnu.org @ 2022-06-28 10:43 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98935
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.4 |10.5
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 10.4 is being released, retargeting bugs to GCC 10.5.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/98935] [coroutines] co_await on statement expressions causes ICE
2021-02-02 15:47 [Bug c++/98935] New: [coroutines] co_await on statement expressions causes ICE mail+gnu at tzik dot jp
` (2 preceding siblings ...)
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
4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2023-07-07 9:24 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98935
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |11.3.0
Resolution|--- |FIXED
Status|NEW |RESOLVED
Known to fail| |10.5.0, 11.2.0
Target Milestone|10.5 |11.3
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed in GCC 11.3.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/98935] [coroutines] co_await on statement expressions causes ICE
2021-02-02 15:47 [Bug c++/98935] New: [coroutines] co_await on statement expressions causes ICE mail+gnu at tzik dot jp
` (3 preceding siblings ...)
2023-07-07 9:24 ` rguenth at gcc dot gnu.org
@ 2024-02-01 21:07 ` lozko.roma at gmail dot com
4 siblings, 0 replies; 6+ messages in thread
From: lozko.roma at gmail dot com @ 2024-02-01 21:07 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98935
Roman Lozko <lozko.roma at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |lozko.roma at gmail dot com
--- Comment #5 from Roman Lozko <lozko.roma at gmail dot com> ---
Broken in trunk
internal compiler error: in register_local_var_uses, at cp/coroutines.cc:3903
https://godbolt.org/z/j9KTsroxj
^ permalink raw reply [flat|nested] 6+ messages in thread
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2021-02-02 15:47 [Bug c++/98935] New: [coroutines] co_await on statement expressions causes ICE mail+gnu at tzik dot jp
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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