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* [Bug c++/99180] New: ICE with alias template and empty parameter pack
@ 2021-02-20 15:37 szilardszaloki at gmail dot com
2021-02-22 9:51 ` [Bug c++/99180] " marxin at gcc dot gnu.org
` (13 more replies)
0 siblings, 14 replies; 15+ messages in thread
From: szilardszaloki at gmail dot com @ 2021-02-20 15:37 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99180
Bug ID: 99180
Summary: ICE with alias template and empty parameter pack
Product: gcc
Version: 11.0
URL: https://godbolt.org/z/qrGn34
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: szilardszaloki at gmail dot com
Target Milestone: ---
template <bool, typename... Ts>
struct A {
A(Ts...) {}
};
template <typename... Ts>
using B = A<false, Ts...>;
template <typename... Ts>
using C = A<true, Ts...>;
template <typename... Ts>
A(Ts...) -> C<Ts...>;
int main(int const, char const* const []) {
B{};
return 0;
}
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug c++/99180] ICE with alias template and empty parameter pack
2021-02-20 15:37 [Bug c++/99180] New: ICE with alias template and empty parameter pack szilardszaloki at gmail dot com
@ 2021-02-22 9:51 ` marxin at gcc dot gnu.org
2021-02-23 12:08 ` [Bug c++/99180] [10/11 Regression] " rguenth at gcc dot gnu.org
` (12 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-02-22 9:51 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99180
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
Last reconfirmed| |2021-02-22
Status|UNCONFIRMED |WAITING
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
With -std=c++17, it started with r10-5020-g1a291106384cabc7.
Is it really a valid test-case?
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug c++/99180] [10/11 Regression] ICE with alias template and empty parameter pack
2021-02-20 15:37 [Bug c++/99180] New: ICE with alias template and empty parameter pack szilardszaloki at gmail dot com
2021-02-22 9:51 ` [Bug c++/99180] " marxin at gcc dot gnu.org
@ 2021-02-23 12:08 ` rguenth at gcc dot gnu.org
2021-02-26 12:54 ` rguenth at gcc dot gnu.org
` (11 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-02-23 12:08 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99180
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |10.3
Keywords|ice-on-valid-code |ice-on-invalid-code
Status|WAITING |NEW
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
clang rejects it
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug c++/99180] [10/11 Regression] ICE with alias template and empty parameter pack
2021-02-20 15:37 [Bug c++/99180] New: ICE with alias template and empty parameter pack szilardszaloki at gmail dot com
2021-02-22 9:51 ` [Bug c++/99180] " marxin at gcc dot gnu.org
2021-02-23 12:08 ` [Bug c++/99180] [10/11 Regression] " rguenth at gcc dot gnu.org
@ 2021-02-26 12:54 ` rguenth at gcc dot gnu.org
2021-03-03 20:32 ` mpolacek at gcc dot gnu.org
` (10 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-02-26 12:54 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99180
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug c++/99180] [10/11 Regression] ICE with alias template and empty parameter pack
2021-02-20 15:37 [Bug c++/99180] New: ICE with alias template and empty parameter pack szilardszaloki at gmail dot com
` (2 preceding siblings ...)
2021-02-26 12:54 ` rguenth at gcc dot gnu.org
@ 2021-03-03 20:32 ` mpolacek at gcc dot gnu.org
2021-04-08 12:02 ` rguenth at gcc dot gnu.org
` (9 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2021-03-03 20:32 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99180
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=99118
CC| |mpolacek at gcc dot gnu.org
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Probably a dup of 99118 which itself is likely a dup.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug c++/99180] [10/11 Regression] ICE with alias template and empty parameter pack
2021-02-20 15:37 [Bug c++/99180] New: ICE with alias template and empty parameter pack szilardszaloki at gmail dot com
` (3 preceding siblings ...)
2021-03-03 20:32 ` mpolacek at gcc dot gnu.org
@ 2021-04-08 12:02 ` rguenth at gcc dot gnu.org
2021-04-09 21:09 ` jason at gcc dot gnu.org
` (8 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-04-08 12:02 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99180
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.3 |10.4
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 10.3 is being released, retargeting bugs to GCC 10.4.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug c++/99180] [10/11 Regression] ICE with alias template and empty parameter pack
2021-02-20 15:37 [Bug c++/99180] New: ICE with alias template and empty parameter pack szilardszaloki at gmail dot com
` (4 preceding siblings ...)
2021-04-08 12:02 ` rguenth at gcc dot gnu.org
@ 2021-04-09 21:09 ` jason at gcc dot gnu.org
2021-04-10 4:07 ` cvs-commit at gcc dot gnu.org
` (7 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: jason at gcc dot gnu.org @ 2021-04-09 21:09 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99180
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
Status|NEW |ASSIGNED
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug c++/99180] [10/11 Regression] ICE with alias template and empty parameter pack
2021-02-20 15:37 [Bug c++/99180] New: ICE with alias template and empty parameter pack szilardszaloki at gmail dot com
` (5 preceding siblings ...)
2021-04-09 21:09 ` jason at gcc dot gnu.org
@ 2021-04-10 4:07 ` cvs-commit at gcc dot gnu.org
2021-04-10 4:08 ` [Bug c++/99180] [10 " jason at gcc dot gnu.org
` (6 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-04-10 4:07 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99180
--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jason Merrill <jason@gcc.gnu.org>:
https://gcc.gnu.org/g:1a19d334ce493ec2ce2daeac74beef63fd67e2bc
commit r11-8104-g1a19d334ce493ec2ce2daeac74beef63fd67e2bc
Author: Jason Merrill <jason@redhat.com>
Date: Fri Apr 9 18:02:38 2021 -0400
c++: deduction guide using alias [PR99180]
alias_ctad_tweaks was expecting that all deduction guides for the class
would be suitable for deduction from the alias definition; in this case,
the
deduction guide uses 'true' and the alias B uses 'false', so deduction
fails. But that's OK, we just don't use that deduction guide. I also
noticed that we were giving up on deduction entirely if substitution failed
for some guide; we should only give up on that particular deduction guide.
We ought to give a better diagnostic about this case when deduction fails,
but that can wait.
gcc/cp/ChangeLog:
PR c++/99180
PR c++/93295
PR c++/93867
PR c++/99118
PR c++/96873
* pt.c (alias_ctad_tweaks): Handle failure better.
gcc/testsuite/ChangeLog:
PR c++/99180
PR c++/93295
PR c++/93867
PR c++/95486
* g++.dg/cpp2a/class-deduction-alias5.C: New test.
* g++.dg/cpp2a/class-deduction-alias6.C: New test.
* g++.dg/cpp2a/class-deduction-alias7.C: New test.
* g++.dg/cpp2a/class-deduction-alias8.C: New test.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug c++/99180] [10 Regression] ICE with alias template and empty parameter pack
2021-02-20 15:37 [Bug c++/99180] New: ICE with alias template and empty parameter pack szilardszaloki at gmail dot com
` (6 preceding siblings ...)
2021-04-10 4:07 ` cvs-commit at gcc dot gnu.org
@ 2021-04-10 4:08 ` jason at gcc dot gnu.org
2021-04-10 4:17 ` jason at gcc dot gnu.org
` (5 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: jason at gcc dot gnu.org @ 2021-04-10 4:08 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99180
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |11.0
Summary|[10/11 Regression] ICE with |[10 Regression] ICE with
|alias template and empty |alias template and empty
|parameter pack |parameter pack
--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 11 so far.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug c++/99180] [10 Regression] ICE with alias template and empty parameter pack
2021-02-20 15:37 [Bug c++/99180] New: ICE with alias template and empty parameter pack szilardszaloki at gmail dot com
` (7 preceding siblings ...)
2021-04-10 4:08 ` [Bug c++/99180] [10 " jason at gcc dot gnu.org
@ 2021-04-10 4:17 ` jason at gcc dot gnu.org
2021-04-14 14:57 ` ppalka at gcc dot gnu.org
` (4 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: jason at gcc dot gnu.org @ 2021-04-10 4:17 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99180
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ensadc at mailnesia dot com
--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> ---
*** Bug 93295 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug c++/99180] [10 Regression] ICE with alias template and empty parameter pack
2021-02-20 15:37 [Bug c++/99180] New: ICE with alias template and empty parameter pack szilardszaloki at gmail dot com
` (8 preceding siblings ...)
2021-04-10 4:17 ` jason at gcc dot gnu.org
@ 2021-04-14 14:57 ` ppalka at gcc dot gnu.org
2021-04-14 14:58 ` ppalka at gcc dot gnu.org
` (3 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: ppalka at gcc dot gnu.org @ 2021-04-14 14:57 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99180
Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pacoarjonilla at yahoo dot es
--- Comment #8 from Patrick Palka <ppalka at gcc dot gnu.org> ---
*** Bug 94560 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug c++/99180] [10 Regression] ICE with alias template and empty parameter pack
2021-02-20 15:37 [Bug c++/99180] New: ICE with alias template and empty parameter pack szilardszaloki at gmail dot com
` (9 preceding siblings ...)
2021-04-14 14:57 ` ppalka at gcc dot gnu.org
@ 2021-04-14 14:58 ` ppalka at gcc dot gnu.org
2021-05-20 21:35 ` cvs-commit at gcc dot gnu.org
` (2 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: ppalka at gcc dot gnu.org @ 2021-04-14 14:58 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99180
Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |nathan at gcc dot gnu.org
--- Comment #9 from Patrick Palka <ppalka at gcc dot gnu.org> ---
*** Bug 94691 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug c++/99180] [10 Regression] ICE with alias template and empty parameter pack
2021-02-20 15:37 [Bug c++/99180] New: ICE with alias template and empty parameter pack szilardszaloki at gmail dot com
` (10 preceding siblings ...)
2021-04-14 14:58 ` ppalka at gcc dot gnu.org
@ 2021-05-20 21:35 ` cvs-commit at gcc dot gnu.org
2022-06-28 10:43 ` jakub at gcc dot gnu.org
2023-07-07 9:28 ` rguenth at gcc dot gnu.org
13 siblings, 0 replies; 15+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-05-20 21:35 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99180
--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jason Merrill
<jason@gcc.gnu.org>:
https://gcc.gnu.org/g:92e9b2a995f718f1c2ab1cd0840b439c24d3535f
commit r10-9852-g92e9b2a995f718f1c2ab1cd0840b439c24d3535f
Author: Jason Merrill <jason@redhat.com>
Date: Fri Apr 9 18:02:38 2021 -0400
c++: deduction guide using alias [PR99180]
alias_ctad_tweaks was expecting that all deduction guides for the class
would be suitable for deduction from the alias definition; in this case,
the
deduction guide uses 'true' and the alias B uses 'false', so deduction
fails. But that's OK, we just don't use that deduction guide. I also
noticed that we were giving up on deduction entirely if substitution failed
for some guide; we should only give up on that particular deduction guide.
We ought to give a better diagnostic about this case when deduction fails,
but that can wait.
gcc/cp/ChangeLog:
PR c++/99180
PR c++/93295
PR c++/93867
PR c++/99118
PR c++/96873
* pt.c (alias_ctad_tweaks): Handle failure better.
gcc/testsuite/ChangeLog:
PR c++/99180
PR c++/93295
PR c++/93867
PR c++/95486
* g++.dg/cpp2a/class-deduction-alias5.C: New test.
* g++.dg/cpp2a/class-deduction-alias6.C: New test.
* g++.dg/cpp2a/class-deduction-alias7.C: New test.
* g++.dg/cpp2a/class-deduction-alias8.C: New test.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug c++/99180] [10 Regression] ICE with alias template and empty parameter pack
2021-02-20 15:37 [Bug c++/99180] New: ICE with alias template and empty parameter pack szilardszaloki at gmail dot com
` (11 preceding siblings ...)
2021-05-20 21:35 ` cvs-commit at gcc dot gnu.org
@ 2022-06-28 10:43 ` jakub at gcc dot gnu.org
2023-07-07 9:28 ` rguenth at gcc dot gnu.org
13 siblings, 0 replies; 15+ 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=99180
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.4 |10.5
--- Comment #11 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] 15+ messages in thread
* [Bug c++/99180] [10 Regression] ICE with alias template and empty parameter pack
2021-02-20 15:37 [Bug c++/99180] New: ICE with alias template and empty parameter pack szilardszaloki at gmail dot com
` (12 preceding siblings ...)
2022-06-28 10:43 ` jakub at gcc dot gnu.org
@ 2023-07-07 9:28 ` rguenth at gcc dot gnu.org
13 siblings, 0 replies; 15+ messages in thread
From: rguenth at gcc dot gnu.org @ 2023-07-07 9:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99180
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Known to work| |10.4.0
Target Milestone|10.5 |10.4
Status|ASSIGNED |RESOLVED
Known to fail| |10.3.0
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed in GCC 10.4.
^ permalink raw reply [flat|nested] 15+ messages in thread
end of thread, other threads:[~2023-07-07 9:28 UTC | newest]
Thread overview: 15+ messages (download: mbox.gz / follow: Atom feed)
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2021-02-20 15:37 [Bug c++/99180] New: ICE with alias template and empty parameter pack szilardszaloki at gmail dot com
2021-02-22 9:51 ` [Bug c++/99180] " marxin at gcc dot gnu.org
2021-02-23 12:08 ` [Bug c++/99180] [10/11 Regression] " rguenth at gcc dot gnu.org
2021-02-26 12:54 ` rguenth at gcc dot gnu.org
2021-03-03 20:32 ` mpolacek at gcc dot gnu.org
2021-04-08 12:02 ` rguenth at gcc dot gnu.org
2021-04-09 21:09 ` jason at gcc dot gnu.org
2021-04-10 4:07 ` cvs-commit at gcc dot gnu.org
2021-04-10 4:08 ` [Bug c++/99180] [10 " jason at gcc dot gnu.org
2021-04-10 4:17 ` jason at gcc dot gnu.org
2021-04-14 14:57 ` ppalka at gcc dot gnu.org
2021-04-14 14:58 ` ppalka at gcc dot gnu.org
2021-05-20 21:35 ` cvs-commit at gcc dot gnu.org
2022-06-28 10:43 ` jakub at gcc dot gnu.org
2023-07-07 9:28 ` rguenth at gcc dot gnu.org
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