1 files changed, 3 insertions, 3 deletions
diff --git a/compiler/rustc_middle/src/mir/basic_blocks.rs b/compiler/rustc_middle/src/mir/basic_blocks.rs
index b93871769..3fb468379 100644
--- a/compiler/rustc_middle/src/mir/basic_blocks.rs
+++ b/compiler/rustc_middle/src/mir/basic_blocks.rs
@@ -6,7 +6,7 @@ use rustc_data_structures::graph;
 use rustc_data_structures::graph::dominators::{dominators, Dominators};
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
 use rustc_data_structures::sync::OnceCell;
-use rustc_index::vec::IndexVec;
+use rustc_index::vec::{IndexSlice, IndexVec};
 use rustc_serialize::{Decodable, Decoder, Encodable, Encoder};
 use smallvec::SmallVec;
 
@@ -124,10 +124,10 @@ impl<'tcx> BasicBlocks<'tcx> {
 }
 
 impl<'tcx> std::ops::Deref for BasicBlocks<'tcx> {
-    type Target = IndexVec<BasicBlock, BasicBlockData<'tcx>>;
+    type Target = IndexSlice<BasicBlock, BasicBlockData<'tcx>>;
 
     #[inline]
-    fn deref(&self) -> &IndexVec<BasicBlock, BasicBlockData<'tcx>> {
+    fn deref(&self) -> &IndexSlice<BasicBlock, BasicBlockData<'tcx>> {
         &self.basic_blocks
     }
 }