[Bug libstdc++/119754] std::uninitialized_value_construct does not begin lifetime of trivial types

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119754

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
GCC fails to diagnose it for the same reason that it fails to diagnose this:

#include <memory>
consteval bool f()
{
  int* p = std::allocator<int>().allocate(1);
  *p = 99;
  std::allocator<int>().deallocate(p, 1);
  return true;
}
static_assert(f());

I'm not sure if we have a bug about this, but there are some similar ones.