diff --git a/compiler/rustc_infer/src/infer/combine.rs b/compiler/rustc_infer/src/infer/combine.rs
index 964222307bcaf..f5504b05dc4e3 100644
--- a/compiler/rustc_infer/src/infer/combine.rs
+++ b/compiler/rustc_infer/src/infer/combine.rs
@@ -125,11 +125,11 @@ impl<'tcx> InferCtxt<'tcx> {
             }
 
             (ty::Alias(AliasKind::Projection, _), _) if self.tcx.trait_solver_next() => {
-                relation.register_type_equate_obligation(a.into(), b.into());
+                relation.register_type_equate_obligation(a, b);
                 Ok(b)
             }
             (_, ty::Alias(AliasKind::Projection, _)) if self.tcx.trait_solver_next() => {
-                relation.register_type_equate_obligation(b.into(), a.into());
+                relation.register_type_equate_obligation(b, a);
                 Ok(a)
             }
 
diff --git a/compiler/rustc_mir_transform/src/ctfe_limit.rs b/compiler/rustc_mir_transform/src/ctfe_limit.rs
index 7d127032179b4..1b3ac78fbc664 100644
--- a/compiler/rustc_mir_transform/src/ctfe_limit.rs
+++ b/compiler/rustc_mir_transform/src/ctfe_limit.rs
@@ -47,8 +47,7 @@ fn has_back_edge(
         return false;
     }
     // Check if any of the dominators of the node are also the node's successor.
-    doms.dominators(node)
-        .any(|dom| node_data.terminator().successors().into_iter().any(|succ| succ == dom))
+    doms.dominators(node).any(|dom| node_data.terminator().successors().any(|succ| succ == dom))
 }
 
 fn insert_counter(basic_block_data: &mut BasicBlockData<'_>) {
diff --git a/src/librustdoc/clean/utils.rs b/src/librustdoc/clean/utils.rs
index 4d8ce54dc5c62..6fe665d7e4068 100644
--- a/src/librustdoc/clean/utils.rs
+++ b/src/librustdoc/clean/utils.rs
@@ -129,7 +129,7 @@ fn external_generic_args<'tcx>(
         });
         GenericArgs::Parenthesized { inputs, output }
     } else {
-        GenericArgs::AngleBracketed { args: args.into(), bindings: bindings.into() }
+        GenericArgs::AngleBracketed { args: args.into(), bindings }
     }
 }