[Bug libfortran/81986] sanitizer detects negation of large number in string.c

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81986

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Tobias Burnus <burnus@gcc.gnu.org>:

https://gcc.gnu.org/g:006693a59f7cd1310aed53a2816020bedf1fb742

commit r11-7470-g006693a59f7cd1310aed53a2816020bedf1fb742
Author: Tobias Burnus <tobias@codesourcery.com>
Date:   Wed Mar 3 08:05:45 2021 +0100

    libgfortran: Fix negation for largest integer [PR81986]

    libgfortran/ChangeLog:
    2021-03-01  Vittorio Zecca  <zeccav@gmail.com>
                Tobias Burnus  <tobias@codesourcery.com>

            PR libfortran/81986
            * runtime/string.c (gfc_itoa): Cast to unsigned before
            negating.