[Bug c++/98798] Custom operator new[] and delete[] is buggy for aligned class

[marxin at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98798

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2021-01-25
             Status|UNCONFIRMED                 |ASSIGNED
     Ever confirmed|0                           |1
           Assignee|unassigned at gcc dot gnu.org      |marxin at gcc dot 
gnu.org
                 CC|                            |marxin at gcc dot gnu.org

--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, reduced test-case:

$ cat pr98798.C
#include <iostream>
#include <memory>

class alignas(32) Foo
{
public :
    char x;

    void * operator new[ ] (size_t s, std::align_val_t a)
    {
      __builtin_printf ("s: %d, a: %d\n", s, a);
        return aligned_alloc(static_cast<size_t>(a), s);
    }

    void operator delete[ ] (void *p, size_t s, std::align_val_t a)
    {
    }
};

int main()
{
  auto p = std::make_unique<Foo[]>(3);
}

I'm going to take a look.