2 Checks for comparisons with an address of a trait vtable.
5 Comparing trait objects pointers compares an vtable addresses which
6 are not guaranteed to be unique and could vary between different code generation units.
7 Furthermore vtables for different types could have the same address after being merged
12 let a: Rc<dyn Trait> = ...
13 let b: Rc<dyn Trait> = ...
14 if Rc::ptr_eq(&a, &b) {