1 files changed, 9 insertions, 1 deletions
diff --git a/compiler/rustc_middle/src/ty/impls_ty.rs b/compiler/rustc_middle/src/ty/impls_ty.rs
index b03874a90..129d94769 100644
--- a/compiler/rustc_middle/src/ty/impls_ty.rs
+++ b/compiler/rustc_middle/src/ty/impls_ty.rs
@@ -29,7 +29,7 @@ where
             }
 
             let mut hasher = StableHasher::new();
-            (&self[..]).hash_stable(hcx, &mut hasher);
+            self[..].hash_stable(hcx, &mut hasher);
 
             let hash: Fingerprint = hasher.finish();
             cache.borrow_mut().insert(key, hash);
@@ -84,6 +84,14 @@ impl<'a> HashStable<StableHashingContext<'a>> for mir::interpret::AllocId {
     }
 }
 
+// CtfeProvenance is an AllocId and a bool.
+impl<'a> HashStable<StableHashingContext<'a>> for mir::interpret::CtfeProvenance {
+    fn hash_stable(&self, hcx: &mut StableHashingContext<'a>, hasher: &mut StableHasher) {
+        self.alloc_id().hash_stable(hcx, hasher);
+        self.immutable().hash_stable(hcx, hasher);
+    }
+}
+
 impl<'a> ToStableHashKey<StableHashingContext<'a>> for region::Scope {
     type KeyType = region::Scope;