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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/105689] Bogus `-Wstringop-overflow=` after accessing field,
 then containing struct (wrong "region size")
Date: Mon, 23 May 2022 07:30:44 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105689

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |msebor at gcc dot gnu.org
           Keywords|                            |diagnostic
      Known to fail|                            |11.2.0, 12.1.0

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's likely triggered by us CSEing &me->sub.field1 and &me->sub but I don't
know how that changes whether a diagnostic happens or not.  Hmm, IIRC there=
's
some magic going on at the frontend which attaches some further attributes
which
then _might_ get confused with such CSE.

Martin, do you remember off-head how such CSE might impact the diagnostics?=