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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/95057] missing -Wunused-but-set-variable warning on multiple
 assignments, not all of them used
Date: Mon, 11 May 2020 12:53:56 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95057

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That is something this warning can't warn about.
The warning is a simple FE warning that uses two bits, one for whether cert=
ain
decl was used and one whether it was read.  The warning then diagnoses those
that have the former bit set and not the latter (of course, there are some
exceptions etc.).=