2 files changed, 5 insertions, 0 deletions
diff --git a/src/librustc_data_structures/graph/mod.rs b/src/librustc_data_structures/graph/mod.rs
index e59085a9e3a..749709521e8 100644
--- a/src/librustc_data_structures/graph/mod.rs
+++ b/src/librustc_data_structures/graph/mod.rs
@@ -39,6 +39,7 @@ where
     }
 }
 
+#[allow(unused_lifetimes)]
 pub trait GraphSuccessors<'graph> {
     type Item;
     type Iter: Iterator<Item = Self::Item>;
@@ -54,6 +55,7 @@ where
     ) -> <Self as GraphPredecessors<'_>>::Iter;
 }
 
+#[allow(unused_lifetimes)]
 pub trait GraphPredecessors<'graph> {
     type Item;
     type Iter: Iterator<Item = Self::Item>;
diff --git a/src/librustc_data_structures/owning_ref/mod.rs b/src/librustc_data_structures/owning_ref/mod.rs
index a7af615fa50..3b49ce71063 100644
--- a/src/librustc_data_structures/owning_ref/mod.rs
+++ b/src/librustc_data_structures/owning_ref/mod.rs
@@ -283,6 +283,7 @@ impl<T> Erased for T {}
 /// Helper trait for erasing the concrete type of what an owner dereferences to,
 /// for example `Box<T> -> Box<Erased>`. This would be unneeded with
 /// higher kinded types support in the language.
+#[allow(unused_lifetimes)]
 pub unsafe trait IntoErased<'a> {
     /// Owner with the dereference type substituted to `Erased`.
     type Erased;
@@ -293,6 +294,7 @@ pub unsafe trait IntoErased<'a> {
 /// Helper trait for erasing the concrete type of what an owner dereferences to,
 /// for example `Box<T> -> Box<Erased + Send>`. This would be unneeded with
 /// higher kinded types support in the language.
+#[allow(unused_lifetimes)]
 pub unsafe trait IntoErasedSend<'a> {
     /// Owner with the dereference type substituted to `Erased + Send`.
     type Erased: Send;
@@ -303,6 +305,7 @@ pub unsafe trait IntoErasedSend<'a> {
 /// Helper trait for erasing the concrete type of what an owner dereferences to,
 /// for example `Box<T> -> Box<Erased + Send + Sync>`. This would be unneeded with
 /// higher kinded types support in the language.
+#[allow(unused_lifetimes)]
 pub unsafe trait IntoErasedSendSync<'a> {
     /// Owner with the dereference type substituted to `Erased + Send + Sync`.
     type Erased: Send + Sync;