{"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"ty::Never"}]}
                ty::Never => Some("the `!` type has no valid value".into()),
                ty::FnPtr(..) => Some("function pointers must be non-null".into()),
                ty::RawPtr(ty, _) if matches!(ty.kind(), ty::Dynamic(..)) =>