[Bug c++/95806] New: Result of call with reference argument to newed object is cached during constant evaluation

[johelegp at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95806

            Bug ID: 95806
           Summary: Result of call with reference argument to newed object
                    is cached during constant evaluation
           Product: gcc
           Version: 10.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: johelegp at gmail dot com
  Target Milestone: ---

See https://godbolt.org/z/zzM-Qn.
```C++
#include <cassert>

constexpr bool is_zero(int& x) { return x == 0; }

constexpr void f()
{
    int& x = *new int{0};
    assert(is_zero(x));
    x = 1;
    assert(!is_zero(x));
    delete &x;
}

constexpr int x{([]() consteval { f(); }(), 0)};
```