[Bug libstdc++/90442] std::pmr::new_delete_resource->allocate results in UBSan error member call on address ... which does not point to an object of type 'memory_resource'

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90442

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

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

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The type new_del_res_t is derived from memory_resource, so this is a false
positive. UBsan can't see the truth, because src/c++17/memory_resource.o in
libstdc++.so is not compiled with -fsanitize=undefined.