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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/108309] [12 Regression] ICE in in
 cxx_eval_component_reference, at cp/constexpr.cc:4136
Date: Fri, 06 Jan 2023 06:33:58 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108309

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to tim blechmann from comment #3)
> > That is a conditionally supported construct in C++. clang does not supp=
ort it but GCC does.=20
> >=20
> > GCC does warn with -Wconditionally-supported
>=20
> interesting. i may have to reduce it manually rather than going through
> cvise: the real-world code builds with clang and gcc doesn't seem to emit=
 a
> warning with -Wconditionally-supported

Or you could add -Werror=3Dconditionally-supported as an option and reduce =
it
that way ...=