2 files changed, 4 insertions, 7 deletions
diff --git a/compiler/rustc_data_structures/src/graph/scc/mod.rs b/compiler/rustc_data_structures/src/graph/scc/mod.rs
index 2db8e466e11..486a9ba77b7 100644
--- a/compiler/rustc_data_structures/src/graph/scc/mod.rs
+++ b/compiler/rustc_data_structures/src/graph/scc/mod.rs
@@ -307,10 +307,7 @@ where
     fn walk_unvisited_node(&mut self, depth: usize, node: G::Node) -> WalkReturn<S> {
         debug!("walk_unvisited_node(depth = {:?}, node = {:?})", depth, node);
 
-        debug_assert!(match self.node_states[node] {
-            NodeState::NotVisited => true,
-            _ => false,
-        });
+        debug_assert!(matches!(self.node_states[node], NodeState::NotVisited));
 
         // Push `node` onto the stack.
         self.node_states[node] = NodeState::BeingVisited { depth };
diff --git a/compiler/rustc_data_structures/src/sso/map.rs b/compiler/rustc_data_structures/src/sso/map.rs
index fa510e58314..fe8ae7abf98 100644
--- a/compiler/rustc_data_structures/src/sso/map.rs
+++ b/compiler/rustc_data_structures/src/sso/map.rs
@@ -395,7 +395,7 @@ where
     V: Copy,
 {
     fn extend<T: IntoIterator<Item = (&'a K, &'a V)>>(&mut self, iter: T) {
-        self.extend(iter.into_iter().map(|(k, v)| (k.clone(), v.clone())))
+        self.extend(iter.into_iter().map(|(k, v)| (*k, *v)))
     }
 
     #[inline]
@@ -451,7 +451,7 @@ impl<'a, K, V> IntoIterator for &'a SsoHashMap<K, V> {
     fn into_iter(self) -> Self::IntoIter {
         match self {
             SsoHashMap::Array(array) => EitherIter::Left(array.into_iter().map(adapt_array_ref_it)),
-            SsoHashMap::Map(map) => EitherIter::Right(map.into_iter()),
+            SsoHashMap::Map(map) => EitherIter::Right(map.iter()),
         }
     }
 }
@@ -469,7 +469,7 @@ impl<'a, K, V> IntoIterator for &'a mut SsoHashMap<K, V> {
     fn into_iter(self) -> Self::IntoIter {
         match self {
             SsoHashMap::Array(array) => EitherIter::Left(array.into_iter().map(adapt_array_mut_it)),
-            SsoHashMap::Map(map) => EitherIter::Right(map.into_iter()),
+            SsoHashMap::Map(map) => EitherIter::Right(map.iter_mut()),
         }
     }
 }