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* [Bug c++/96614] New: constexpr deletion failure through pointer to base with virtual base class
@ 2020-08-14  9:42 pkeir at outlook dot com
  2020-08-17  6:45 ` [Bug c++/96614] " marxin at gcc dot gnu.org
  2021-08-17  5:56 ` pinskia at gcc dot gnu.org
  0 siblings, 2 replies; 3+ messages in thread
From: pkeir at outlook dot com @ 2020-08-14  9:42 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96614

            Bug ID: 96614
           Summary: constexpr deletion failure through pointer to base
                    with virtual base class
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pkeir at outlook dot com
  Target Milestone: ---

Created attachment 49062
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49062&action=edit
A C++ file containing the code described.

The C++20 code below (also attached) fails to compile with GCC trunk.

struct FooBase {
  constexpr virtual ~FooBase() {}
};

struct Foo : public FooBase {};

constexpr bool test()
{
  FooBase* pb = new Foo;
  delete pb;

  return true;
}

int main(int argc, char *argv[])
{
  static_assert(test());
  test(); // no problem

  return 0;
}

The error is invoked by the `static_assert` expression, and relates to the call
to `delete pb`. It states:

virtual constexpr Foo::~Foo()’ used before its definition

^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2021-08-17  5:56 UTC | newest]

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2020-08-14  9:42 [Bug c++/96614] New: constexpr deletion failure through pointer to base with virtual base class pkeir at outlook dot com
2020-08-17  6:45 ` [Bug c++/96614] " marxin at gcc dot gnu.org
2021-08-17  5:56 ` pinskia at gcc dot gnu.org

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