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* [Bug c++/98305] New: Incomprehensible -Wmismatched-new-delete warning
@ 2020-12-15 22:10 sbergman at redhat dot com
2020-12-16 18:27 ` [Bug c++/98305] " msebor at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: sbergman at redhat dot com @ 2020-12-15 22:10 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98305
Bug ID: 98305
Summary: Incomprehensible -Wmismatched-new-delete warning
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: sbergman at redhat dot com
Target Milestone: ---
With recent GCC 11 trunk (at git commit
8dede2411195eb2fd672d8d0c758f94732bd6d77):
> $ cat test.cc
> #include <cstddef>
> template<typename> struct Reference {};
> template<typename> struct S2 {
> static void * operator new(std::size_t);
> static void operator delete(void *);
> S2();
> };
> void f() { new S2<Reference<int>>; }
> $ g++ -Wmismatched-new-delete -c test.cc
> test.cc: In function ‘void f()’:
> test.cc:8:16: warning: ‘static void S2< <template-parameter-1-1> >::operator delete(void*) [with <template-parameter-1-1> = Reference<int>]’ called on pointer returned from a mismatched allocation function [-Wmismatched-new-delete]
> 8 | void f() { new S2<Reference<int>>; }
> | ^~~~~~~~~~~~~~~~~~
> test.cc:8:16: note: returned from ‘static void* S2< <template-parameter-1-1> >::operator new(std::size_t) [with <template-parameter-1-1> = Reference<int>]’
(And oddly enough, the warning disappears when Reference is renamed to e.g.
S1.)
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/98305] Incomprehensible -Wmismatched-new-delete warning
2020-12-15 22:10 [Bug c++/98305] New: Incomprehensible -Wmismatched-new-delete warning sbergman at redhat dot com
@ 2020-12-16 18:27 ` msebor at gcc dot gnu.org
2020-12-16 18:27 ` msebor at gcc dot gnu.org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: msebor at gcc dot gnu.org @ 2020-12-16 18:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98305
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Keywords| |diagnostic
Ever confirmed|0 |1
Last reconfirmed| |2020-12-16
Target Milestone|--- |11.0
CC| |msebor at gcc dot gnu.org
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The warning compares the mangled names of the operators and doesn't interpret
template instantiations quite correctly.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/98305] Incomprehensible -Wmismatched-new-delete warning
2020-12-15 22:10 [Bug c++/98305] New: Incomprehensible -Wmismatched-new-delete warning sbergman at redhat dot com
2020-12-16 18:27 ` [Bug c++/98305] " msebor at gcc dot gnu.org
@ 2020-12-16 18:27 ` msebor at gcc dot gnu.org
2020-12-17 2:11 ` [Bug c++/98305] spurious -Wmismatched-new-delete on template instance msebor at gcc dot gnu.org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: msebor at gcc dot gnu.org @ 2020-12-16 18:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98305
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Status|NEW |ASSIGNED
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/98305] spurious -Wmismatched-new-delete on template instance
2020-12-15 22:10 [Bug c++/98305] New: Incomprehensible -Wmismatched-new-delete warning sbergman at redhat dot com
2020-12-16 18:27 ` [Bug c++/98305] " msebor at gcc dot gnu.org
2020-12-16 18:27 ` msebor at gcc dot gnu.org
@ 2020-12-17 2:11 ` msebor at gcc dot gnu.org
2020-12-17 14:03 ` sbergman at redhat dot com
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: msebor at gcc dot gnu.org @ 2020-12-17 2:11 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98305
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|Incomprehensible |spurious
|-Wmismatched-new-delete |-Wmismatched-new-delete on
|warning |template instance
Keywords| |patch
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
https://gcc.gnu.org/pipermail/gcc-patches/2020-December/562141.html
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/98305] spurious -Wmismatched-new-delete on template instance
2020-12-15 22:10 [Bug c++/98305] New: Incomprehensible -Wmismatched-new-delete warning sbergman at redhat dot com
` (2 preceding siblings ...)
2020-12-17 2:11 ` [Bug c++/98305] spurious -Wmismatched-new-delete on template instance msebor at gcc dot gnu.org
@ 2020-12-17 14:03 ` sbergman at redhat dot com
2021-01-06 20:46 ` cvs-commit at gcc dot gnu.org
2021-01-06 20:47 ` msebor at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: sbergman at redhat dot com @ 2020-12-17 14:03 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98305
--- Comment #3 from Stephan Bergmann <sbergman at redhat dot com> ---
(In reply to Martin Sebor from comment #2)
> https://gcc.gnu.org/pipermail/gcc-patches/2020-December/562141.html
Thanks; can confirm that fixes my LibreOffice build.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/98305] spurious -Wmismatched-new-delete on template instance
2020-12-15 22:10 [Bug c++/98305] New: Incomprehensible -Wmismatched-new-delete warning sbergman at redhat dot com
` (3 preceding siblings ...)
2020-12-17 14:03 ` sbergman at redhat dot com
@ 2021-01-06 20:46 ` cvs-commit at gcc dot gnu.org
2021-01-06 20:47 ` msebor at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-01-06 20:46 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98305
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Martin Sebor <msebor@gcc.gnu.org>:
https://gcc.gnu.org/g:fd64f348a6b40621dc2bcc743f5fdfb31ed0894c
commit r11-6507-gfd64f348a6b40621dc2bcc743f5fdfb31ed0894c
Author: Martin Sebor <msebor@redhat.com>
Date: Wed Jan 6 13:36:18 2021 -0700
PR c++/98305 spurious -Wmismatched-new-delete on template instance
gcc/ChangeLog:
PR c++/98305
* builtins.c (new_delete_mismatch_p): New overload.
(new_delete_mismatch_p (tree, tree)): Call it.
gcc/testsuite/ChangeLog:
PR c++/98305
* g++.dg/warn/Wmismatched-new-delete-3.C: New test.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/98305] spurious -Wmismatched-new-delete on template instance
2020-12-15 22:10 [Bug c++/98305] New: Incomprehensible -Wmismatched-new-delete warning sbergman at redhat dot com
` (4 preceding siblings ...)
2021-01-06 20:46 ` cvs-commit at gcc dot gnu.org
@ 2021-01-06 20:47 ` msebor at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: msebor at gcc dot gnu.org @ 2021-01-06 20:47 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98305
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Committed in r11-6507.
^ permalink raw reply [flat|nested] 7+ messages in thread
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2020-12-15 22:10 [Bug c++/98305] New: Incomprehensible -Wmismatched-new-delete warning sbergman at redhat dot com
2020-12-16 18:27 ` [Bug c++/98305] " msebor at gcc dot gnu.org
2020-12-16 18:27 ` msebor at gcc dot gnu.org
2020-12-17 2:11 ` [Bug c++/98305] spurious -Wmismatched-new-delete on template instance msebor at gcc dot gnu.org
2020-12-17 14:03 ` sbergman at redhat dot com
2021-01-06 20:46 ` cvs-commit at gcc dot gnu.org
2021-01-06 20:47 ` msebor at gcc dot gnu.org
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