use rustc::ty::{RegionKind, RegionVid};
use rustc::ty::RegionKind::ReScope;
-use rustc_data_structures::bitslice::{BitwiseOperator, Word};
+use rustc_data_structures::bitvec::{BitwiseOperator, Word};
use rustc_data_structures::fx::FxHashMap;
use rustc_data_structures::indexed_set::IdxSet;
use rustc_data_structures::indexed_vec::IndexVec;