{"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"\"2nd"}]}
                    "2nd field of `Unique` should be PhantomData but is {:?}",
                    phantom.layout().ty.ty_adt_def().is_some_and(|adt| adt.is_phantom_data()),
                    phantom.layout().ty,