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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/95177] error: array subscript has type char
Date: Tue, 19 May 2020 12:40:53 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95177

Eric Gallager <egallager at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |egallager at gcc dot gnu.o=
rg
           Keywords|                            |build, diagnostic
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=3D94182

--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Roland Illig from comment #2)
> >--- Comment #1 from kargl at gcc dot gnu.org ---
> >Why cast to unsigned char?  The prototypes for tolower(), toupper(),
> >isdigit(), etc show that the type of the argument is int.
>=20
> See https://stackoverflow.com/a/60696378 for a detailed explanation.

...which in turn led to bug 94182=