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From: "pkubaj at anongoth dot pl" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/89494] Bootstrap error when using GCC 4.2.1
Date: Wed, 15 Apr 2020 13:42:59 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D89494

--- Comment #22 from Piotr Kubaj <pkubaj at anongoth dot pl> ---
(In reply to CVS Commits from comment #21)
> The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:
>=20
> https://gcc.gnu.org/g:c00568f376078129196740d83946d54dc5437401
>=20
> commit r10-7736-gc00568f376078129196740d83946d54dc5437401
> Author: Gustavo Romero <gromero@linux.ibm.com>
> Date:   Wed Apr 15 15:14:45 2020 +0200
>=20
>     selftest: Work around GCC 4.2 PR33916 bug by optimizing the ctor
> [PR89494]
>=20=20=20=20=20
>     GCC 4.2 due to PR33916 miscompiles temp_dump_context ctor, because it
> doesn't
>     zero initialize the whole dump_context temporary on which it runs the
> static
>     get method and during destruction of the temporary an uninitialized
> pointer
>     is deleted.
>=20=20=20=20=20
>     More recent GCC versions properly zero initialize it and ideally
> optimize away
>     the construction/destruction of the temporary, as it isn't used for
> anything,
>     but there is no reason to create the temporary, static member functio=
ns
> can
>     be called without an associated object.
>=20=20=20=20=20
>     2020-04-15  Gustavo Romero  <gromero@linux.ibm.com>
>=20=20=20=20=20
>             PR bootstrap/89494
>             * dumpfile.c (selftest::temp_dump_context::temp_dump_context):
>             Don't construct a dump_context temporary to call static metho=
d.

Thanks for commiting this! Can you also merge to branch 9?=