diff --git a/clippy_lints/src/dereference.rs b/clippy_lints/src/dereference.rs
index d1ab7fb6796..09a073f4234 100644
--- a/clippy_lints/src/dereference.rs
+++ b/clippy_lints/src/dereference.rs
@@ -959,7 +959,7 @@ fn binding_ty_auto_deref_stability<'tcx>(
                     ))
                     .is_sized(cx.tcx.at(DUMMY_SP), cx.param_env.without_caller_bounds()),
             ),
-            TyKind::OpaqueDef(..) | TyKind::Infer | TyKind::Typeof(..) | TyKind::TraitObject(..) | TyKind::Err => {
+            TyKind::OpaqueDef(..) | TyKind::ImplTraitInTrait(..) | TyKind::Infer | TyKind::Typeof(..) | TyKind::TraitObject(..) | TyKind::Err => {
                 Position::ReborrowStable(precedence)
             },
         };
diff --git a/clippy_lints/src/missing_doc.rs b/clippy_lints/src/missing_doc.rs
index 3701fdb4adb..9f518c7aaa3 100644
--- a/clippy_lints/src/missing_doc.rs
+++ b/clippy_lints/src/missing_doc.rs
@@ -147,7 +147,8 @@ fn check_item(&mut self, cx: &LateContext<'tcx>, it: &'tcx hir::Item<'_>) {
             | hir::ItemKind::TraitAlias(..)
             | hir::ItemKind::TyAlias(..)
             | hir::ItemKind::Union(..)
-            | hir::ItemKind::OpaqueTy(..) => {},
+            | hir::ItemKind::OpaqueTy(..)
+            | hir::ItemKind::ImplTraitPlaceholder(..) => {},
             hir::ItemKind::ExternCrate(..)
             | hir::ItemKind::ForeignMod { .. }
             | hir::ItemKind::GlobalAsm(..)
diff --git a/clippy_lints/src/missing_inline.rs b/clippy_lints/src/missing_inline.rs
index 07bc2ca5d3c..9fd1a475d74 100644
--- a/clippy_lints/src/missing_inline.rs
+++ b/clippy_lints/src/missing_inline.rs
@@ -128,6 +128,7 @@ fn check_item(&mut self, cx: &LateContext<'tcx>, it: &'tcx hir::Item<'_>) {
             | hir::ItemKind::TyAlias(..)
             | hir::ItemKind::Union(..)
             | hir::ItemKind::OpaqueTy(..)
+            | hir::ItemKind::ImplTraitPlaceholder(..)
             | hir::ItemKind::ExternCrate(..)
             | hir::ItemKind::ForeignMod { .. }
             | hir::ItemKind::Impl { .. }
diff --git a/clippy_utils/src/hir_utils.rs b/clippy_utils/src/hir_utils.rs
index ff23ed5fffa..9f8500d41a8 100644
--- a/clippy_utils/src/hir_utils.rs
+++ b/clippy_utils/src/hir_utils.rs
@@ -990,6 +990,9 @@ pub fn hash_tykind(&mut self, ty: &TyKind<'_>) {
             TyKind::OpaqueDef(_, arg_list) => {
                 self.hash_generic_args(arg_list);
             },
+            TyKind::ImplTraitInTrait(_) => {
+                // Do nothing
+            }
             TyKind::TraitObject(_, lifetime, _) => {
                 self.hash_lifetime(*lifetime);
             },