https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89494

--- Comment #21 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>:

https://gcc.gnu.org/g:c00568f376078129196740d83946d54dc5437401

commit r10-7736-gc00568f376078129196740d83946d54dc5437401
Author: Gustavo Romero <grom...@linux.ibm.com>
Date:   Wed Apr 15 15:14:45 2020 +0200

    selftest: Work around GCC 4.2 PR33916 bug by optimizing the ctor [PR89494]

    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.

    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 functions can
    be called without an associated object.

    2020-04-15  Gustavo Romero  <grom...@linux.ibm.com>

            PR bootstrap/89494
            * dumpfile.c (selftest::temp_dump_context::temp_dump_context):
            Don't construct a dump_context temporary to call static method.

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