Revert b983e42936feab29f6333e9835913afc6b4a394e.

1 files changed, 3 insertions, 3 deletions

diff --git a/compiler/rustc_query_system/src/dep_graph/serialized.rs b/compiler/rustc_query_system/src/dep_graph/serialized.rs
index 3b20ec70d73..2c44054e4c8 100644
--- a/compiler/rustc_query_system/src/dep_graph/serialized.rs
+++ b/compiler/rustc_query_system/src/dep_graph/serialized.rs
@@ -19,7 +19,7 @@ use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::profiling::SelfProfilerRef;
 use rustc_data_structures::sync::Lock;
 use rustc_index::vec::{Idx, IndexVec};
-use rustc_serialize::opaque::{FileEncodeResult, FileEncoder, IntEncodedWithFixedSize, MemDecoder};
+use rustc_serialize::opaque::{self, FileEncodeResult, FileEncoder, IntEncodedWithFixedSize};
 use rustc_serialize::{Decodable, Decoder, Encodable};
 use smallvec::SmallVec;
 use std::convert::TryInto;
@@ -96,11 +96,11 @@ impl<K: DepKind> SerializedDepGraph<K> {
     }
 }
 
-impl<'a, K: DepKind + Decodable<MemDecoder<'a>>> Decodable<MemDecoder<'a>>
+impl<'a, K: DepKind + Decodable<opaque::Decoder<'a>>> Decodable<opaque::Decoder<'a>>
     for SerializedDepGraph<K>
 {
     #[instrument(level = "debug", skip(d))]
-    fn decode(d: &mut MemDecoder<'a>) -> SerializedDepGraph<K> {
+    fn decode(d: &mut opaque::Decoder<'a>) -> SerializedDepGraph<K> {
         let start_position = d.position();
 
         // The last 16 bytes are the node count and edge count.