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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/107280] [10/11/12/13 Regression] ICE: tree check: expected
 constructor, have view_convert_expr in cxx_eval_store_expression, at
 cp/constexpr.cc:5928
Date: Wed, 08 Mar 2023 22:08:42 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107280

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|ICE: tree check: expected   |[10/11/12/13 Regression]
                   |constructor, have           |ICE: tree check: expected
                   |view_convert_expr in        |constructor, have
                   |cxx_eval_store_expression,  |view_convert_expr in
                   |at cp/constexpr.cc:5928     |cxx_eval_store_expression,
                   |                            |at cp/constexpr.cc:5928
   Target Milestone|13.0                        |10.5
           Priority|P3                          |P2

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This isn't about consteval.  Adjusted C++17 test:

// PR c++/107280

struct string {
  char str[8] =3D "";
};
template <int, int> constexpr void
test ()
{
  string str{};
  auto append =3D [&](const char *s) { *str.str =3D *s; };
  append("");
}

static_assert ((test<true, true>(), true), "");

Started with r10-3661-g8e007055dd1374, making this a regression.

commit 8e007055dd1374ca4c44406a4ead172be0dfa3a8
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Sat Oct 5 09:38:21 2019 +0200

    PR c++/91369 - Implement P0784R7: constexpr new=