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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/104620] FAIL: g++.dg/cpp23/consteval-if2.C  -std=gnu++20 
 (test for errors)
Date: Thu, 24 Mar 2022 13:37:51 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104620

--- Comment #6 from Patrick Palka <ppalka at gcc dot gnu.org> ---
The reason that the two tests in constexpr-if2.C don't fail with -fchecking=
=3D2
after r12-7264 seems to be a latent bug.  The error comes from the call to
fold_non_dependent_expr in build_non_dependent_expr (which is guarded by
flag_checking > 1), despite passing complain=3Dtf_none.  I think build_over=
_call
needs to use cxx_constant_value_sfinae instead of cxx_constant_value when
evaluating a consteval call...  I have a patch for this.=