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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/97320] False positive "Array reference out of bounds in
 loop" in a protecting if block
Date: Mon, 02 Nov 2020 17:03:55 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97320

kargl at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kargl at gcc dot gnu.org

--- Comment #3 from kargl at gcc dot gnu.org ---
(In reply to Jacques Le Bourlot from comment #2)
>=20
> The compiler should see that "IF (i >=3D 1)" THEN "i-1 >=3D 0". Quoting t=
he
> manual is not an adequate answer. An upgrade would be most welcomed.
>=20

gfortran is mostly maintained by a diminishing number of contributors.
Messages telling the few remaining contributors what they ought to
do are likely to fall on deaf ears.  Patches from new contributors
are welcomed; otherwise, sometime in the future, perhaps a decade=20
or so, someone might care enough to try to fix this annoyance.  In the=20
meantime, add -Wno-do-subscript to your options.=