[Bug other/101568] New: [12 regression] g++.dg/ipa/pr82352.C fails after r12-2338

[Bug other/101568] New: [12 regression] g++.dg/ipa/pr82352.C fails after r12-2338

[seurer at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101568

            Bug ID: 101568
           Summary: [12 regression] g++.dg/ipa/pr82352.C fails after
                    r12-2338
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
          Assignee: unassigned at gcc dot gnu.org
          Reporter: seurer at gcc dot gnu.org
  Target Milestone: ---

g:f0500db3692276f60e0562c17c87a0cb03e34398, r12-2338
make  -k check-gcc RUNTESTFLAGS="dg.exp=g++.dg/ipa/pr82352.C"
FAIL: g++.dg/ipa/pr82352.C  -std=gnu++98 (test for excess errors)
FAIL: g++.dg/ipa/pr82352.C  -std=gnu++14 (test for excess errors)
FAIL: g++.dg/ipa/pr82352.C  -std=gnu++17 (test for excess errors)
FAIL: g++.dg/ipa/pr82352.C  -std=gnu++2a (test for excess errors)
# of unexpected failures        4

Same failure for all 4:

FAIL: g++.dg/ipa/pr82352.C  -std=gnu++17 (test for excess errors)
Excess errors:
cc1plus: warning: writing 16 bytes into a region of size 0
[-Wstringop-overflow=]

Note: This still occurs with r12-2456.

[Bug other/101568] [12 regression] g++.dg/ipa/pr82352.C fails after r12-2338

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101568

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |12.0

[Bug tree-optimization/101568] [12 regression] g++.dg/ipa/pr82352.C fails after r12-2338

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101568

--- Comment #1 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:50f3ac1beb0cb400484dd2621dd0e3e530583e69

commit r12-2474-g50f3ac1beb0cb400484dd2621dd0e3e530583e69
Author: Martin Sebor <msebor@redhat.com>
Date:   Thu Jul 22 10:23:11 2021 -0600

    Remove an invalid defintion [PR101568].

    Resolves:
    PR testsuite/101568 - g++.dg/ipa/pr82352.C fails

    gcc/testsuite/ChangeLog:
            PR testsuite/101568
            * g++.dg/ipa/pr82352.C

[Bug testsuite/101568] [12 regression] g++.dg/ipa/pr82352.C fails after r12-2338

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101568

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
   Last reconfirmed|                            |2021-7-22
             Status|UNCONFIRMED                 |RESOLVED
          Component|tree-optimization           |testsuite

--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
The test calls a member operator new that returns an invalid address and then
stores data at that address.  The warning correctly points that out.

class B
{
public :
  void *operator new(size_t t) { return (void*)(42); };
};

Removing the bad definition avoids the warning.