[Bug libstdc++/105957] New: __n * sizeof(_Tp) might overflow under consteval context for std::allocator

[unlvsur at live dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105957

            Bug ID: 105957
           Summary: __n * sizeof(_Tp) might overflow under consteval
                    context for std::allocator
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: unlvsur at live dot com
  Target Milestone: ---

https://github.com/gcc-mirror/gcc/blob/b3dd7d8b48227d3489039ca66b6c0ea2da743255/libstdc%2B%2B-v3/include/bits/allocator.h#L187

__n * sizeof(_Tp) can overflow under consteval context. Need checks i believe.
return static_cast<_Tp*>(::operator new(__n * sizeof(_Tp)));