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From: "ppalka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/105622] New: ICE in cxx_eval_store_expression with
 [[no_unique_address]] and empty data members
Date: Mon, 16 May 2022 19:06:50 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105622

            Bug ID: 105622
           Summary: ICE in cxx_eval_store_expression with
                    [[no_unique_address]] and empty data members
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ppalka at gcc dot gnu.org
  Target Milestone: ---

struct empty {
  empty() =3D default;
  constexpr empty(int) { }
};

struct container {
  empty __begin_ =3D {};
  [[no_unique_address]] empty __size_ =3D 0;
};

constexpr bool test() {
  container s;
  return true;
}
static_assert(test());


testcase.ii: In function =E2=80=98constexpr bool test()=E2=80=99:
testcase.ii:12:13:   in =E2=80=98constexpr=E2=80=99 expansion of =E2=80=98s=
.container::container()=E2=80=99
testcase.ii:12:13: internal compiler error: in cxx_eval_store_expression, at
cp/constexpr.cc:5927
   12 |   container s;
      |             ^
0x6a0ca0 cxx_eval_store_expression
        /home/patrick/gcc/gcc/cp/constexpr.cc:5927
0x96c254 cxx_eval_constant_expression
        /home/patrick/gcc/gcc/cp/constexpr.cc:6847
0x96c4d6 cxx_eval_constant_expression
        /home/patrick/gcc/gcc/cp/constexpr.cc:7236
0x96c717 cxx_eval_constant_expression
        /home/patrick/gcc/gcc/cp/constexpr.cc:7048=