[Bug libstdc++/66742] abort on sorting list with custom compiler that is not stateless

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66742

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Indeed. Splicing lists has a precondition that l1.get_allocator() ==
l2.get_allocator(), and so we check:

  if (l1.get_allocator() != l2.get_allocator())
    abort();

and obviously that fails for your invalid allocator type.