use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
use rustc_data_structures::sync::Lrc;
use rustc_macros::HashStable_Generic;
+use rustc_span::{Span, DUMMY_SP};
use smallvec::{smallvec, SmallVec};
-use syntax_pos::{Span, DUMMY_SP};
use std::{iter, mem};