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* [Bug c++/54253] New: [C++11] constexpr constructor crashes with polymorphic base classes
@ 2012-08-14 14:15 mrks at koios dot de
2012-08-14 14:20 ` [Bug c++/54253] " paolo.carlini at oracle dot com
` (11 more replies)
0 siblings, 12 replies; 13+ messages in thread
From: mrks at koios dot de @ 2012-08-14 14:15 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54253
Bug #: 54253
Summary: [C++11] constexpr constructor crashes with polymorphic
base classes
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: mrks@koios.de
Created attachment 28010
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28010
preprocessed source
In _some_ constellations, g++ exits with a segmentation fault:
I could not figure out a pattern to reduce all to a common 'sourceproblem', so
here is a list of what I tried:
* One polymorphic base class:
** implicit base constructor, explicitly called (as in the example): crashes
** implicit base constructor (even with default non-static member assignments),
implicitly called: works
** explicit constexpr base constructor, explicitly called: works
** explicit constexpr base constructor, implicitly called: works
* Multiple Inhertiance, first Base is polymorphic:
nearly the same as above, except that it doesn't crash in the first case but
says
const3.cc: In constructor 'constexpr Derived::Derived()':
const3.cc:15:42: error: uninitialized member 'Derived::<anonymous>' in
'constexpr' constructor
const3.cc:15: confused by earlier errors, bailing out
* Multiple Inhertiance, second Base is polymorphic:
crashes always
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug c++/54253] [C++11] constexpr constructor crashes with polymorphic base classes
2012-08-14 14:15 [Bug c++/54253] New: [C++11] constexpr constructor crashes with polymorphic base classes mrks at koios dot de
@ 2012-08-14 14:20 ` paolo.carlini at oracle dot com
2012-08-14 14:34 ` paolo.carlini at oracle dot com
` (10 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: paolo.carlini at oracle dot com @ 2012-08-14 14:20 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54253
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-08-14
Ever Confirmed|0 |1
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-08-14 14:20:18 UTC ---
Confirmed.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug c++/54253] [C++11] constexpr constructor crashes with polymorphic base classes
2012-08-14 14:15 [Bug c++/54253] New: [C++11] constexpr constructor crashes with polymorphic base classes mrks at koios dot de
2012-08-14 14:20 ` [Bug c++/54253] " paolo.carlini at oracle dot com
@ 2012-08-14 14:34 ` paolo.carlini at oracle dot com
2012-08-14 14:45 ` mrks at koios dot de
` (9 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: paolo.carlini at oracle dot com @ 2012-08-14 14:34 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54253
--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-08-14 14:34:00 UTC ---
It would be nice to have 2 slightly more complex testcases too, like const3.cc
and one for your third case. Care to add something? Thanks in advance.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug c++/54253] [C++11] constexpr constructor crashes with polymorphic base classes
2012-08-14 14:15 [Bug c++/54253] New: [C++11] constexpr constructor crashes with polymorphic base classes mrks at koios dot de
2012-08-14 14:20 ` [Bug c++/54253] " paolo.carlini at oracle dot com
2012-08-14 14:34 ` paolo.carlini at oracle dot com
@ 2012-08-14 14:45 ` mrks at koios dot de
2012-08-14 14:48 ` paolo.carlini at oracle dot com
` (8 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: mrks at koios dot de @ 2012-08-14 14:45 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54253
--- Comment #3 from mrks at koios dot de 2012-08-14 14:45:31 UTC ---
Created attachment 28012
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28012
first base polymorphic
multiple inheritance, first base class is polymorphic
-> complains about uninitialized member Derived::<anonymous>
If Base::Base is the default ctor (no arguments), it doesn't complain but
segfaults.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug c++/54253] [C++11] constexpr constructor crashes with polymorphic base classes
2012-08-14 14:15 [Bug c++/54253] New: [C++11] constexpr constructor crashes with polymorphic base classes mrks at koios dot de
` (2 preceding siblings ...)
2012-08-14 14:45 ` mrks at koios dot de
@ 2012-08-14 14:48 ` paolo.carlini at oracle dot com
2012-08-14 14:49 ` mrks at koios dot de
` (7 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: paolo.carlini at oracle dot com @ 2012-08-14 14:48 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54253
--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-08-14 14:48:45 UTC ---
Thanks!
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug c++/54253] [C++11] constexpr constructor crashes with polymorphic base classes
2012-08-14 14:15 [Bug c++/54253] New: [C++11] constexpr constructor crashes with polymorphic base classes mrks at koios dot de
` (3 preceding siblings ...)
2012-08-14 14:48 ` paolo.carlini at oracle dot com
@ 2012-08-14 14:49 ` mrks at koios dot de
2012-08-14 14:51 ` mrks at koios dot de
` (6 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: mrks at koios dot de @ 2012-08-14 14:49 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54253
mrks at koios dot de changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #28012|application/octet-stream |text/plain
mime type| |
--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-08-14 14:48:45 UTC ---
Thanks!
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug c++/54253] [C++11] constexpr constructor crashes with polymorphic base classes
2012-08-14 14:15 [Bug c++/54253] New: [C++11] constexpr constructor crashes with polymorphic base classes mrks at koios dot de
` (4 preceding siblings ...)
2012-08-14 14:49 ` mrks at koios dot de
@ 2012-08-14 14:51 ` mrks at koios dot de
2012-08-21 11:54 ` paolo.carlini at oracle dot com
` (5 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: mrks at koios dot de @ 2012-08-14 14:51 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54253
mrks at koios dot de changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #28012|application/octet-stream |text/plain
mime type| |
--- Comment #5 from mrks at koios dot de 2012-08-14 14:51:02 UTC ---
Created attachment 28013
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28013
second base polymorphic
multiple inheritance, second base class is polymorphic
-> crashes if the first base class has a member (int x)
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug c++/54253] [C++11] constexpr constructor crashes with polymorphic base classes
2012-08-14 14:15 [Bug c++/54253] New: [C++11] constexpr constructor crashes with polymorphic base classes mrks at koios dot de
` (5 preceding siblings ...)
2012-08-14 14:51 ` mrks at koios dot de
@ 2012-08-21 11:54 ` paolo.carlini at oracle dot com
2012-09-06 16:24 ` jason at gcc dot gnu.org
` (4 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: paolo.carlini at oracle dot com @ 2012-08-21 11:54 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54253
--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-08-21 11:53:53 UTC ---
Related to PR54341
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug c++/54253] [C++11] constexpr constructor crashes with polymorphic base classes
2012-08-14 14:15 [Bug c++/54253] New: [C++11] constexpr constructor crashes with polymorphic base classes mrks at koios dot de
` (6 preceding siblings ...)
2012-08-21 11:54 ` paolo.carlini at oracle dot com
@ 2012-09-06 16:24 ` jason at gcc dot gnu.org
2012-09-06 16:25 ` jason at gcc dot gnu.org
` (3 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: jason at gcc dot gnu.org @ 2012-09-06 16:24 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54253
--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> 2012-09-06 16:24:25 UTC ---
Author: jason
Date: Thu Sep 6 16:24:10 2012
New Revision: 191033
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=191033
Log:
PR c++/54341
PR c++/54253
* semantics.c (sort_constexpr_mem_initializers): New.
(build_constexpr_constructor_member_initializers): Use it.
(cx_check_missing_mem_inits): Skip artificial fields.
* init.c (expand_aggr_init_1): Don't zero out a class
with no data.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-virtual2.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-virtual3.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/init.c
trunk/gcc/cp/semantics.c
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug c++/54253] [C++11] constexpr constructor crashes with polymorphic base classes
2012-08-14 14:15 [Bug c++/54253] New: [C++11] constexpr constructor crashes with polymorphic base classes mrks at koios dot de
` (7 preceding siblings ...)
2012-09-06 16:24 ` jason at gcc dot gnu.org
@ 2012-09-06 16:25 ` jason at gcc dot gnu.org
2012-09-06 16:25 ` jason at gcc dot gnu.org
` (2 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: jason at gcc dot gnu.org @ 2012-09-06 16:25 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54253
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
Target Milestone|--- |4.8.0
--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> 2012-09-06 16:24:25 UTC ---
Author: jason
Date: Thu Sep 6 16:24:10 2012
New Revision: 191033
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=191033
Log:
PR c++/54341
PR c++/54253
* semantics.c (sort_constexpr_mem_initializers): New.
(build_constexpr_constructor_member_initializers): Use it.
(cx_check_missing_mem_inits): Skip artificial fields.
* init.c (expand_aggr_init_1): Don't zero out a class
with no data.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-virtual2.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-virtual3.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/init.c
trunk/gcc/cp/semantics.c
trunk/gcc/testsuite/ChangeLog
--- Comment #8 from Jason Merrill <jason at gcc dot gnu.org> 2012-09-06 16:25:00 UTC ---
Fixed for 4.8.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug c++/54253] [C++11] constexpr constructor crashes with polymorphic base classes
2012-08-14 14:15 [Bug c++/54253] New: [C++11] constexpr constructor crashes with polymorphic base classes mrks at koios dot de
` (8 preceding siblings ...)
2012-09-06 16:25 ` jason at gcc dot gnu.org
@ 2012-09-06 16:25 ` jason at gcc dot gnu.org
2012-09-10 14:24 ` jason at gcc dot gnu.org
2012-09-10 14:43 ` jason at gcc dot gnu.org
11 siblings, 0 replies; 13+ messages in thread
From: jason at gcc dot gnu.org @ 2012-09-06 16:25 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54253
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
Target Milestone|--- |4.8.0
--- Comment #8 from Jason Merrill <jason at gcc dot gnu.org> 2012-09-06 16:25:00 UTC ---
Fixed for 4.8.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug c++/54253] [C++11] constexpr constructor crashes with polymorphic base classes
2012-08-14 14:15 [Bug c++/54253] New: [C++11] constexpr constructor crashes with polymorphic base classes mrks at koios dot de
` (9 preceding siblings ...)
2012-09-06 16:25 ` jason at gcc dot gnu.org
@ 2012-09-10 14:24 ` jason at gcc dot gnu.org
2012-09-10 14:43 ` jason at gcc dot gnu.org
11 siblings, 0 replies; 13+ messages in thread
From: jason at gcc dot gnu.org @ 2012-09-10 14:24 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54253
--- Comment #9 from Jason Merrill <jason at gcc dot gnu.org> 2012-09-10 14:24:15 UTC ---
Author: jason
Date: Mon Sep 10 14:24:07 2012
New Revision: 191145
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=191145
Log:
PR c++/54341
PR c++/54253
* semantics.c (sort_constexpr_mem_initializers): New.
(build_constexpr_constructor_member_initializers): Use it.
(cx_check_missing_mem_inits): Skip artificial fields.
* init.c (expand_aggr_init_1): Don't zero out a class
with no data.
Added:
branches/gcc-4_7-branch/gcc/testsuite/g++.dg/cpp0x/constexpr-virtual2.C
branches/gcc-4_7-branch/gcc/testsuite/g++.dg/cpp0x/constexpr-virtual3.C
Modified:
branches/gcc-4_7-branch/gcc/cp/ChangeLog
branches/gcc-4_7-branch/gcc/cp/init.c
branches/gcc-4_7-branch/gcc/cp/semantics.c
branches/gcc-4_7-branch/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug c++/54253] [C++11] constexpr constructor crashes with polymorphic base classes
2012-08-14 14:15 [Bug c++/54253] New: [C++11] constexpr constructor crashes with polymorphic base classes mrks at koios dot de
` (10 preceding siblings ...)
2012-09-10 14:24 ` jason at gcc dot gnu.org
@ 2012-09-10 14:43 ` jason at gcc dot gnu.org
11 siblings, 0 replies; 13+ messages in thread
From: jason at gcc dot gnu.org @ 2012-09-10 14:43 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54253
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
Target Milestone|4.8.0 |4.7.2
--- Comment #9 from Jason Merrill <jason at gcc dot gnu.org> 2012-09-10 14:24:15 UTC ---
Author: jason
Date: Mon Sep 10 14:24:07 2012
New Revision: 191145
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=191145
Log:
PR c++/54341
PR c++/54253
* semantics.c (sort_constexpr_mem_initializers): New.
(build_constexpr_constructor_member_initializers): Use it.
(cx_check_missing_mem_inits): Skip artificial fields.
* init.c (expand_aggr_init_1): Don't zero out a class
with no data.
Added:
branches/gcc-4_7-branch/gcc/testsuite/g++.dg/cpp0x/constexpr-virtual2.C
branches/gcc-4_7-branch/gcc/testsuite/g++.dg/cpp0x/constexpr-virtual3.C
Modified:
branches/gcc-4_7-branch/gcc/cp/ChangeLog
branches/gcc-4_7-branch/gcc/cp/init.c
branches/gcc-4_7-branch/gcc/cp/semantics.c
branches/gcc-4_7-branch/gcc/testsuite/ChangeLog
--- Comment #10 from Jason Merrill <jason at gcc dot gnu.org> 2012-09-10 14:43:06 UTC ---
And for 4.7.2.
^ permalink raw reply [flat|nested] 13+ messages in thread
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2012-08-14 14:15 [Bug c++/54253] New: [C++11] constexpr constructor crashes with polymorphic base classes mrks at koios dot de
2012-08-14 14:20 ` [Bug c++/54253] " paolo.carlini at oracle dot com
2012-08-14 14:34 ` paolo.carlini at oracle dot com
2012-08-14 14:45 ` mrks at koios dot de
2012-08-14 14:48 ` paolo.carlini at oracle dot com
2012-08-14 14:49 ` mrks at koios dot de
2012-08-14 14:51 ` mrks at koios dot de
2012-08-21 11:54 ` paolo.carlini at oracle dot com
2012-09-06 16:24 ` jason at gcc dot gnu.org
2012-09-06 16:25 ` jason at gcc dot gnu.org
2012-09-06 16:25 ` jason at gcc dot gnu.org
2012-09-10 14:24 ` jason at gcc dot gnu.org
2012-09-10 14:43 ` jason at gcc dot gnu.org
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