diff --git a/compiler/rustc_ast_lowering/src/lib.rs b/compiler/rustc_ast_lowering/src/lib.rs
index a8d6a99cbeb..0306196f65a 100644
--- a/compiler/rustc_ast_lowering/src/lib.rs
+++ b/compiler/rustc_ast_lowering/src/lib.rs
@@ -264,7 +264,7 @@ enum ImplTraitContext<'b, 'a> {
         /// Origin: Either OpaqueTyOrigin::FnReturn or OpaqueTyOrigin::AsyncFn,
         origin: hir::OpaqueTyOrigin,
     },
-    /// Impl trait in type aliases, consts and statics.
+    /// Impl trait in type aliases.
     OtherOpaqueTy {
         /// Set of lifetimes that this opaque type can capture, if it uses
         /// them. This includes lifetimes bound since we entered this context.
@@ -1767,21 +1767,10 @@ fn visit_lifetime(&mut self, lifetime: &'v hir::Lifetime) {
     }
 
     fn lower_local(&mut self, l: &Local) -> hir::Local<'hir> {
-        let ty = l.ty.as_ref().map(|t| {
-            let mut capturable_lifetimes;
-            self.lower_ty(
-                t,
-                if self.sess.features_untracked().impl_trait_in_bindings {
-                    capturable_lifetimes = FxHashSet::default();
-                    ImplTraitContext::OtherOpaqueTy {
-                        capturable_lifetimes: &mut capturable_lifetimes,
-                        origin: hir::OpaqueTyOrigin::Binding,
-                    }
-                } else {
-                    ImplTraitContext::Disallowed(ImplTraitPosition::Binding)
-                },
-            )
-        });
+        let ty = l
+            .ty
+            .as_ref()
+            .map(|t| self.lower_ty(t, ImplTraitContext::Disallowed(ImplTraitPosition::Binding)));
         let init = l.init.as_ref().map(|e| self.lower_expr(e));
         let hir_id = self.lower_node_id(l.id);
         self.lower_attrs(hir_id, &l.attrs);
diff --git a/compiler/rustc_hir/src/hir.rs b/compiler/rustc_hir/src/hir.rs
index 4b2679e164a..141788e7df4 100644
--- a/compiler/rustc_hir/src/hir.rs
+++ b/compiler/rustc_hir/src/hir.rs
@@ -2270,8 +2270,6 @@ pub enum OpaqueTyOrigin {
     FnReturn,
     /// `async fn`
     AsyncFn,
-    /// `let _: impl Trait = ...`
-    Binding,
     /// type aliases: `type Foo = impl Trait;`
     TyAlias,
     /// Impl trait consts, statics, bounds.
diff --git a/compiler/rustc_trait_selection/src/opaque_types.rs b/compiler/rustc_trait_selection/src/opaque_types.rs
index cc98cd72566..f380ad54d7f 100644
--- a/compiler/rustc_trait_selection/src/opaque_types.rs
+++ b/compiler/rustc_trait_selection/src/opaque_types.rs
@@ -402,9 +402,7 @@ fn constrain_opaque_type<FRR: FreeRegionRelations<'tcx>>(
             }
             // These opaque type inherit all lifetime parameters from their
             // parent, so we have to check them all.
-            hir::OpaqueTyOrigin::Binding
-            | hir::OpaqueTyOrigin::TyAlias
-            | hir::OpaqueTyOrigin::Misc => 0,
+            hir::OpaqueTyOrigin::TyAlias | hir::OpaqueTyOrigin::Misc => 0,
         };
 
         let span = tcx.def_span(def_id);
diff --git a/compiler/rustc_typeck/src/check/check.rs b/compiler/rustc_typeck/src/check/check.rs
index 496721e6f76..98ac604b09f 100644
--- a/compiler/rustc_typeck/src/check/check.rs
+++ b/compiler/rustc_typeck/src/check/check.rs
@@ -665,13 +665,9 @@ pub(super) fn check_opaque_for_cycles<'tcx>(
     span: Span,
     origin: &hir::OpaqueTyOrigin,
 ) -> Result<(), ErrorReported> {
-    if let Err(partially_expanded_type) = tcx.try_expand_impl_trait_type(def_id.to_def_id(), substs)
-    {
+    if tcx.try_expand_impl_trait_type(def_id.to_def_id(), substs).is_err() {
         match origin {
             hir::OpaqueTyOrigin::AsyncFn => async_opaque_type_cycle_error(tcx, span),
-            hir::OpaqueTyOrigin::Binding => {
-                binding_opaque_type_cycle_error(tcx, def_id, span, partially_expanded_type)
-            }
             _ => opaque_type_cycle_error(tcx, def_id, span),
         }
         Err(ErrorReported)
@@ -704,8 +700,7 @@ fn check_opaque_meets_bounds<'tcx>(
         // Checked when type checking the function containing them.
         hir::OpaqueTyOrigin::FnReturn | hir::OpaqueTyOrigin::AsyncFn => return,
         // Can have different predicates to their defining use
-        hir::OpaqueTyOrigin::Binding | hir::OpaqueTyOrigin::Misc | hir::OpaqueTyOrigin::TyAlias => {
-        }
+        hir::OpaqueTyOrigin::Misc | hir::OpaqueTyOrigin::TyAlias => {}
     }
 
     let hir_id = tcx.hir().local_def_id_to_hir_id(def_id);
diff --git a/compiler/rustc_typeck/src/check/mod.rs b/compiler/rustc_typeck/src/check/mod.rs
index 34d0908bcc7..11f0b47a457 100644
--- a/compiler/rustc_typeck/src/check/mod.rs
+++ b/compiler/rustc_typeck/src/check/mod.rs
@@ -573,66 +573,6 @@ fn get_owner_return_paths(
         })
 }
 
-/// Emit an error for recursive opaque types in a `let` binding.
-fn binding_opaque_type_cycle_error(
-    tcx: TyCtxt<'tcx>,
-    def_id: LocalDefId,
-    span: Span,
-    partially_expanded_type: Ty<'tcx>,
-) {
-    let mut err = struct_span_err!(tcx.sess, span, E0720, "cannot resolve opaque type");
-    err.span_label(span, "cannot resolve opaque type");
-    // Find the owner that declared this `impl Trait` type.
-    let hir_id = tcx.hir().local_def_id_to_hir_id(def_id);
-    let mut prev_hir_id = hir_id;
-    let mut hir_id = tcx.hir().get_parent_node(hir_id);
-    while let Some(node) = tcx.hir().find(hir_id) {
-        match node {
-            hir::Node::Local(hir::Local {
-                pat,
-                init: None,
-                ty: Some(ty),
-                source: hir::LocalSource::Normal,
-                ..
-            }) => {
-                err.span_label(pat.span, "this binding might not have a concrete type");
-                err.span_suggestion_verbose(
-                    ty.span.shrink_to_hi(),
-                    "set the binding to a value for a concrete type to be resolved",
-                    " = /* value */".to_string(),
-                    Applicability::HasPlaceholders,
-                );
-            }
-            hir::Node::Local(hir::Local {
-                init: Some(expr),
-                source: hir::LocalSource::Normal,
-                ..
-            }) => {
-                let hir_id = tcx.hir().local_def_id_to_hir_id(def_id);
-                let typeck_results =
-                    tcx.typeck(tcx.hir().local_def_id(tcx.hir().get_parent_item(hir_id)));
-                if let Some(ty) = typeck_results.node_type_opt(expr.hir_id) {
-                    err.span_label(
-                        expr.span,
-                        &format!(
-                            "this is of type `{}`, which doesn't constrain \
-                             `{}` enough to arrive to a concrete type",
-                            ty, partially_expanded_type
-                        ),
-                    );
-                }
-            }
-            _ => {}
-        }
-        if prev_hir_id == hir_id {
-            break;
-        }
-        prev_hir_id = hir_id;
-        hir_id = tcx.hir().get_parent_node(hir_id);
-    }
-    err.emit();
-}
-
 // Forbid defining intrinsics in Rust code,
 // as they must always be defined by the compiler.
 fn fn_maybe_err(tcx: TyCtxt<'_>, sp: Span, abi: Abi) {
diff --git a/compiler/rustc_typeck/src/collect/type_of.rs b/compiler/rustc_typeck/src/collect/type_of.rs
index 7b0002914ec..15469cb0066 100644
--- a/compiler/rustc_typeck/src/collect/type_of.rs
+++ b/compiler/rustc_typeck/src/collect/type_of.rs
@@ -356,9 +356,6 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> Ty<'_> {
                     let substs = InternalSubsts::identity_for_item(tcx, def_id.to_def_id());
                     tcx.mk_adt(def, substs)
                 }
-                ItemKind::OpaqueTy(OpaqueTy { origin: hir::OpaqueTyOrigin::Binding, .. }) => {
-                    let_position_impl_trait_type(tcx, def_id)
-                }
                 ItemKind::OpaqueTy(OpaqueTy { impl_trait_fn: None, .. }) => {
                     find_opaque_ty_constraints(tcx, def_id)
                 }
@@ -696,60 +693,6 @@ fn visit_trait_item(&mut self, it: &'tcx TraitItem<'tcx>) {
     }
 }
 
-/// Retrieve the inferred concrete type for let position impl trait.
-///
-/// This is different to other kinds of impl trait because:
-///
-/// 1. We know which function contains the defining use (the function that
-///    contains the let statement)
-/// 2. We do not currently allow (free) lifetimes in the return type. `let`
-///    statements in some statically unreachable code are removed from the MIR
-///    by the time we borrow check, and it's not clear how we should handle
-///    those.
-fn let_position_impl_trait_type(tcx: TyCtxt<'_>, opaque_ty_id: LocalDefId) -> Ty<'_> {
-    let scope = tcx.hir().get_defining_scope(tcx.hir().local_def_id_to_hir_id(opaque_ty_id));
-    let scope_def_id = tcx.hir().local_def_id(scope);
-
-    let opaque_ty_def_id = opaque_ty_id.to_def_id();
-
-    let owner_typeck_results = tcx.typeck(scope_def_id);
-    let concrete_ty = owner_typeck_results
-        .concrete_opaque_types
-        .get_by(|(key, _)| key.def_id == opaque_ty_def_id)
-        .map(|concrete_ty| *concrete_ty)
-        .unwrap_or_else(|| {
-            tcx.sess.delay_span_bug(
-                DUMMY_SP,
-                &format!(
-                    "owner {:?} has no opaque type for {:?} in its typeck results",
-                    scope_def_id, opaque_ty_id
-                ),
-            );
-            if let Some(ErrorReported) = owner_typeck_results.tainted_by_errors {
-                // Some error in the owner fn prevented us from populating the
-                // `concrete_opaque_types` table.
-                tcx.ty_error()
-            } else {
-                // We failed to resolve the opaque type or it resolves to
-                // itself. Return the non-revealed type, which should result in
-                // E0720.
-                tcx.mk_opaque(
-                    opaque_ty_def_id,
-                    InternalSubsts::identity_for_item(tcx, opaque_ty_def_id),
-                )
-            }
-        });
-    debug!("concrete_ty = {:?}", concrete_ty);
-    if concrete_ty.has_erased_regions() {
-        // FIXME(impl_trait_in_bindings) Handle this case.
-        tcx.sess.span_fatal(
-            tcx.hir().span(tcx.hir().local_def_id_to_hir_id(opaque_ty_id)),
-            "lifetimes in impl Trait types in bindings are not currently supported",
-        );
-    }
-    concrete_ty
-}
-
 fn infer_placeholder_type<'a>(
     tcx: TyCtxt<'a>,
     def_id: LocalDefId,
diff --git a/src/test/ui/associated-type-bounds/duplicate.full_tait.stderr b/src/test/ui/associated-type-bounds/duplicate.full_tait.stderr
index bd3cac1f887..1d230b43c9f 100644
--- a/src/test/ui/associated-type-bounds/duplicate.full_tait.stderr
+++ b/src/test/ui/associated-type-bounds/duplicate.full_tait.stderr
@@ -280,31 +280,7 @@ LL | static SIT3: impl Iterator<Item: 'static, Item: 'static> = iter::empty();
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:86:46
-   |
-LL | fn lit1() { let _: impl Iterator<Item: Copy, Item: Send> = iter::empty(); }
-   |                                  ----------  ^^^^^^^^^^ re-bound here
-   |                                  |
-   |                                  `Item` bound here first
-
-error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:88:46
-   |
-LL | fn lit2() { let _: impl Iterator<Item: Copy, Item: Copy> = iter::empty(); }
-   |                                  ----------  ^^^^^^^^^^ re-bound here
-   |                                  |
-   |                                  `Item` bound here first
-
-error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:90:49
-   |
-LL | fn lit3() { let _: impl Iterator<Item: 'static, Item: 'static> = iter::empty(); }
-   |                                  -------------  ^^^^^^^^^^^^^ re-bound here
-   |                                  |
-   |                                  `Item` bound here first
-
-error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:93:35
+  --> $DIR/duplicate.rs:86:35
    |
 LL | type TAI1<T: Iterator<Item: Copy, Item: Send>> = T;
    |                       ----------  ^^^^^^^^^^ re-bound here
@@ -312,7 +288,7 @@ LL | type TAI1<T: Iterator<Item: Copy, Item: Send>> = T;
    |                       `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:95:35
+  --> $DIR/duplicate.rs:88:35
    |
 LL | type TAI2<T: Iterator<Item: Copy, Item: Copy>> = T;
    |                       ----------  ^^^^^^^^^^ re-bound here
@@ -320,7 +296,7 @@ LL | type TAI2<T: Iterator<Item: Copy, Item: Copy>> = T;
    |                       `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:97:38
+  --> $DIR/duplicate.rs:90:38
    |
 LL | type TAI3<T: Iterator<Item: 'static, Item: 'static>> = T;
    |                       -------------  ^^^^^^^^^^^^^ re-bound here
@@ -328,7 +304,7 @@ LL | type TAI3<T: Iterator<Item: 'static, Item: 'static>> = T;
    |                       `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:99:44
+  --> $DIR/duplicate.rs:92:44
    |
 LL | type TAW1<T> where T: Iterator<Item: Copy, Item: Send> = T;
    |                                ----------  ^^^^^^^^^^ re-bound here
@@ -336,7 +312,7 @@ LL | type TAW1<T> where T: Iterator<Item: Copy, Item: Send> = T;
    |                                `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:101:44
+  --> $DIR/duplicate.rs:94:44
    |
 LL | type TAW2<T> where T: Iterator<Item: Copy, Item: Copy> = T;
    |                                ----------  ^^^^^^^^^^ re-bound here
@@ -344,7 +320,7 @@ LL | type TAW2<T> where T: Iterator<Item: Copy, Item: Copy> = T;
    |                                `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:103:47
+  --> $DIR/duplicate.rs:96:47
    |
 LL | type TAW3<T> where T: Iterator<Item: 'static, Item: 'static> = T;
    |                                -------------  ^^^^^^^^^^^^^ re-bound here
@@ -352,7 +328,7 @@ LL | type TAW3<T> where T: Iterator<Item: 'static, Item: 'static> = T;
    |                                `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:106:36
+  --> $DIR/duplicate.rs:99:36
    |
 LL | type ETAI1<T: Iterator<Item: Copy, Item: Send>> = impl Copy;
    |                        ----------  ^^^^^^^^^^ re-bound here
@@ -360,7 +336,7 @@ LL | type ETAI1<T: Iterator<Item: Copy, Item: Send>> = impl Copy;
    |                        `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:108:36
+  --> $DIR/duplicate.rs:101:36
    |
 LL | type ETAI2<T: Iterator<Item: Copy, Item: Copy>> = impl Copy;
    |                        ----------  ^^^^^^^^^^ re-bound here
@@ -368,7 +344,7 @@ LL | type ETAI2<T: Iterator<Item: Copy, Item: Copy>> = impl Copy;
    |                        `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:110:39
+  --> $DIR/duplicate.rs:103:39
    |
 LL | type ETAI3<T: Iterator<Item: 'static, Item: 'static>> = impl Copy;
    |                        -------------  ^^^^^^^^^^^^^ re-bound here
@@ -376,7 +352,7 @@ LL | type ETAI3<T: Iterator<Item: 'static, Item: 'static>> = impl Copy;
    |                        `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:112:40
+  --> $DIR/duplicate.rs:105:40
    |
 LL | type ETAI4 = impl Iterator<Item: Copy, Item: Send>;
    |                            ----------  ^^^^^^^^^^ re-bound here
@@ -384,7 +360,7 @@ LL | type ETAI4 = impl Iterator<Item: Copy, Item: Send>;
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:114:40
+  --> $DIR/duplicate.rs:107:40
    |
 LL | type ETAI5 = impl Iterator<Item: Copy, Item: Copy>;
    |                            ----------  ^^^^^^^^^^ re-bound here
@@ -392,7 +368,7 @@ LL | type ETAI5 = impl Iterator<Item: Copy, Item: Copy>;
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:116:43
+  --> $DIR/duplicate.rs:109:43
    |
 LL | type ETAI6 = impl Iterator<Item: 'static, Item: 'static>;
    |                            -------------  ^^^^^^^^^^^^^ re-bound here
@@ -400,7 +376,7 @@ LL | type ETAI6 = impl Iterator<Item: 'static, Item: 'static>;
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:119:36
+  --> $DIR/duplicate.rs:112:36
    |
 LL | trait TRI1<T: Iterator<Item: Copy, Item: Send>> {}
    |                        ----------  ^^^^^^^^^^ re-bound here
@@ -408,7 +384,7 @@ LL | trait TRI1<T: Iterator<Item: Copy, Item: Send>> {}
    |                        `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:121:36
+  --> $DIR/duplicate.rs:114:36
    |
 LL | trait TRI2<T: Iterator<Item: Copy, Item: Copy>> {}
    |                        ----------  ^^^^^^^^^^ re-bound here
@@ -416,7 +392,7 @@ LL | trait TRI2<T: Iterator<Item: Copy, Item: Copy>> {}
    |                        `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:123:39
+  --> $DIR/duplicate.rs:116:39
    |
 LL | trait TRI3<T: Iterator<Item: 'static, Item: 'static>> {}
    |                        -------------  ^^^^^^^^^^^^^ re-bound here
@@ -424,7 +400,7 @@ LL | trait TRI3<T: Iterator<Item: 'static, Item: 'static>> {}
    |                        `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:125:34
+  --> $DIR/duplicate.rs:118:34
    |
 LL | trait TRS1: Iterator<Item: Copy, Item: Send> {}
    |                      ----------  ^^^^^^^^^^ re-bound here
@@ -432,7 +408,7 @@ LL | trait TRS1: Iterator<Item: Copy, Item: Send> {}
    |                      `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:127:34
+  --> $DIR/duplicate.rs:120:34
    |
 LL | trait TRS2: Iterator<Item: Copy, Item: Copy> {}
    |                      ----------  ^^^^^^^^^^ re-bound here
@@ -440,7 +416,7 @@ LL | trait TRS2: Iterator<Item: Copy, Item: Copy> {}
    |                      `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:129:37
+  --> $DIR/duplicate.rs:122:37
    |
 LL | trait TRS3: Iterator<Item: 'static, Item: 'static> {}
    |                      -------------  ^^^^^^^^^^^^^ re-bound here
@@ -448,7 +424,7 @@ LL | trait TRS3: Iterator<Item: 'static, Item: 'static> {}
    |                      `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:131:45
+  --> $DIR/duplicate.rs:124:45
    |
 LL | trait TRW1<T> where T: Iterator<Item: Copy, Item: Send> {}
    |                                 ----------  ^^^^^^^^^^ re-bound here
@@ -456,7 +432,7 @@ LL | trait TRW1<T> where T: Iterator<Item: Copy, Item: Send> {}
    |                                 `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:133:45
+  --> $DIR/duplicate.rs:126:45
    |
 LL | trait TRW2<T> where T: Iterator<Item: Copy, Item: Copy> {}
    |                                 ----------  ^^^^^^^^^^ re-bound here
@@ -464,7 +440,7 @@ LL | trait TRW2<T> where T: Iterator<Item: Copy, Item: Copy> {}
    |                                 `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:135:48
+  --> $DIR/duplicate.rs:128:48
    |
 LL | trait TRW3<T> where T: Iterator<Item: 'static, Item: 'static> {}
    |                                 -------------  ^^^^^^^^^^^^^ re-bound here
@@ -472,7 +448,7 @@ LL | trait TRW3<T> where T: Iterator<Item: 'static, Item: 'static> {}
    |                                 `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:137:46
+  --> $DIR/duplicate.rs:130:46
    |
 LL | trait TRSW1 where Self: Iterator<Item: Copy, Item: Send> {}
    |                                  ----------  ^^^^^^^^^^ re-bound here
@@ -480,7 +456,7 @@ LL | trait TRSW1 where Self: Iterator<Item: Copy, Item: Send> {}
    |                                  `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:137:46
+  --> $DIR/duplicate.rs:130:46
    |
 LL | trait TRSW1 where Self: Iterator<Item: Copy, Item: Send> {}
    |                                  ----------  ^^^^^^^^^^ re-bound here
@@ -488,7 +464,7 @@ LL | trait TRSW1 where Self: Iterator<Item: Copy, Item: Send> {}
    |                                  `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:140:46
+  --> $DIR/duplicate.rs:133:46
    |
 LL | trait TRSW2 where Self: Iterator<Item: Copy, Item: Copy> {}
    |                                  ----------  ^^^^^^^^^^ re-bound here
@@ -496,7 +472,7 @@ LL | trait TRSW2 where Self: Iterator<Item: Copy, Item: Copy> {}
    |                                  `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:140:46
+  --> $DIR/duplicate.rs:133:46
    |
 LL | trait TRSW2 where Self: Iterator<Item: Copy, Item: Copy> {}
    |                                  ----------  ^^^^^^^^^^ re-bound here
@@ -504,7 +480,7 @@ LL | trait TRSW2 where Self: Iterator<Item: Copy, Item: Copy> {}
    |                                  `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:143:49
+  --> $DIR/duplicate.rs:136:49
    |
 LL | trait TRSW3 where Self: Iterator<Item: 'static, Item: 'static> {}
    |                                  -------------  ^^^^^^^^^^^^^ re-bound here
@@ -512,7 +488,7 @@ LL | trait TRSW3 where Self: Iterator<Item: 'static, Item: 'static> {}
    |                                  `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:143:49
+  --> $DIR/duplicate.rs:136:49
    |
 LL | trait TRSW3 where Self: Iterator<Item: 'static, Item: 'static> {}
    |                                  -------------  ^^^^^^^^^^^^^ re-bound here
@@ -520,7 +496,7 @@ LL | trait TRSW3 where Self: Iterator<Item: 'static, Item: 'static> {}
    |                                  `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:153:40
+  --> $DIR/duplicate.rs:146:40
    |
 LL | type TADyn1 = dyn Iterator<Item: Copy, Item: Send>;
    |                            ----------  ^^^^^^^^^^ re-bound here
@@ -528,7 +504,7 @@ LL | type TADyn1 = dyn Iterator<Item: Copy, Item: Send>;
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:155:44
+  --> $DIR/duplicate.rs:148:44
    |
 LL | type TADyn2 = Box<dyn Iterator<Item: Copy, Item: Copy>>;
    |                                ----------  ^^^^^^^^^^ re-bound here
@@ -536,7 +512,7 @@ LL | type TADyn2 = Box<dyn Iterator<Item: Copy, Item: Copy>>;
    |                                `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:157:43
+  --> $DIR/duplicate.rs:150:43
    |
 LL | type TADyn3 = dyn Iterator<Item: 'static, Item: 'static>;
    |                            -------------  ^^^^^^^^^^^^^ re-bound here
@@ -544,7 +520,7 @@ LL | type TADyn3 = dyn Iterator<Item: 'static, Item: 'static>;
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:146:43
+  --> $DIR/duplicate.rs:139:43
    |
 LL | trait TRA1 { type A: Iterator<Item: Copy, Item: Send>; }
    |                               ----------  ^^^^^^^^^^ re-bound here
@@ -552,7 +528,7 @@ LL | trait TRA1 { type A: Iterator<Item: Copy, Item: Send>; }
    |                               `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:148:43
+  --> $DIR/duplicate.rs:141:43
    |
 LL | trait TRA2 { type A: Iterator<Item: Copy, Item: Copy>; }
    |                               ----------  ^^^^^^^^^^ re-bound here
@@ -560,13 +536,13 @@ LL | trait TRA2 { type A: Iterator<Item: Copy, Item: Copy>; }
    |                               `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:150:46
+  --> $DIR/duplicate.rs:143:46
    |
 LL | trait TRA3 { type A: Iterator<Item: 'static, Item: 'static>; }
    |                               -------------  ^^^^^^^^^^^^^ re-bound here
    |                               |
    |                               `Item` bound here first
 
-error: aborting due to 69 previous errors; 2 warnings emitted
+error: aborting due to 66 previous errors; 2 warnings emitted
 
 For more information about this error, try `rustc --explain E0719`.
diff --git a/src/test/ui/associated-type-bounds/duplicate.min_tait.stderr b/src/test/ui/associated-type-bounds/duplicate.min_tait.stderr
index 500e527a018..d978a0c85fe 100644
--- a/src/test/ui/associated-type-bounds/duplicate.min_tait.stderr
+++ b/src/test/ui/associated-type-bounds/duplicate.min_tait.stderr
@@ -272,31 +272,7 @@ LL | static SIT3: impl Iterator<Item: 'static, Item: 'static> = iter::empty();
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:86:46
-   |
-LL | fn lit1() { let _: impl Iterator<Item: Copy, Item: Send> = iter::empty(); }
-   |                                  ----------  ^^^^^^^^^^ re-bound here
-   |                                  |
-   |                                  `Item` bound here first
-
-error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:88:46
-   |
-LL | fn lit2() { let _: impl Iterator<Item: Copy, Item: Copy> = iter::empty(); }
-   |                                  ----------  ^^^^^^^^^^ re-bound here
-   |                                  |
-   |                                  `Item` bound here first
-
-error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:90:49
-   |
-LL | fn lit3() { let _: impl Iterator<Item: 'static, Item: 'static> = iter::empty(); }
-   |                                  -------------  ^^^^^^^^^^^^^ re-bound here
-   |                                  |
-   |                                  `Item` bound here first
-
-error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:93:35
+  --> $DIR/duplicate.rs:86:35
    |
 LL | type TAI1<T: Iterator<Item: Copy, Item: Send>> = T;
    |                       ----------  ^^^^^^^^^^ re-bound here
@@ -304,7 +280,7 @@ LL | type TAI1<T: Iterator<Item: Copy, Item: Send>> = T;
    |                       `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:95:35
+  --> $DIR/duplicate.rs:88:35
    |
 LL | type TAI2<T: Iterator<Item: Copy, Item: Copy>> = T;
    |                       ----------  ^^^^^^^^^^ re-bound here
@@ -312,7 +288,7 @@ LL | type TAI2<T: Iterator<Item: Copy, Item: Copy>> = T;
    |                       `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:97:38
+  --> $DIR/duplicate.rs:90:38
    |
 LL | type TAI3<T: Iterator<Item: 'static, Item: 'static>> = T;
    |                       -------------  ^^^^^^^^^^^^^ re-bound here
@@ -320,7 +296,7 @@ LL | type TAI3<T: Iterator<Item: 'static, Item: 'static>> = T;
    |                       `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:99:44
+  --> $DIR/duplicate.rs:92:44
    |
 LL | type TAW1<T> where T: Iterator<Item: Copy, Item: Send> = T;
    |                                ----------  ^^^^^^^^^^ re-bound here
@@ -328,7 +304,7 @@ LL | type TAW1<T> where T: Iterator<Item: Copy, Item: Send> = T;
    |                                `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:101:44
+  --> $DIR/duplicate.rs:94:44
    |
 LL | type TAW2<T> where T: Iterator<Item: Copy, Item: Copy> = T;
    |                                ----------  ^^^^^^^^^^ re-bound here
@@ -336,7 +312,7 @@ LL | type TAW2<T> where T: Iterator<Item: Copy, Item: Copy> = T;
    |                                `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:103:47
+  --> $DIR/duplicate.rs:96:47
    |
 LL | type TAW3<T> where T: Iterator<Item: 'static, Item: 'static> = T;
    |                                -------------  ^^^^^^^^^^^^^ re-bound here
@@ -344,7 +320,7 @@ LL | type TAW3<T> where T: Iterator<Item: 'static, Item: 'static> = T;
    |                                `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:106:36
+  --> $DIR/duplicate.rs:99:36
    |
 LL | type ETAI1<T: Iterator<Item: Copy, Item: Send>> = impl Copy;
    |                        ----------  ^^^^^^^^^^ re-bound here
@@ -352,7 +328,7 @@ LL | type ETAI1<T: Iterator<Item: Copy, Item: Send>> = impl Copy;
    |                        `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:108:36
+  --> $DIR/duplicate.rs:101:36
    |
 LL | type ETAI2<T: Iterator<Item: Copy, Item: Copy>> = impl Copy;
    |                        ----------  ^^^^^^^^^^ re-bound here
@@ -360,7 +336,7 @@ LL | type ETAI2<T: Iterator<Item: Copy, Item: Copy>> = impl Copy;
    |                        `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:110:39
+  --> $DIR/duplicate.rs:103:39
    |
 LL | type ETAI3<T: Iterator<Item: 'static, Item: 'static>> = impl Copy;
    |                        -------------  ^^^^^^^^^^^^^ re-bound here
@@ -368,7 +344,7 @@ LL | type ETAI3<T: Iterator<Item: 'static, Item: 'static>> = impl Copy;
    |                        `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:112:40
+  --> $DIR/duplicate.rs:105:40
    |
 LL | type ETAI4 = impl Iterator<Item: Copy, Item: Send>;
    |                            ----------  ^^^^^^^^^^ re-bound here
@@ -376,7 +352,7 @@ LL | type ETAI4 = impl Iterator<Item: Copy, Item: Send>;
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:114:40
+  --> $DIR/duplicate.rs:107:40
    |
 LL | type ETAI5 = impl Iterator<Item: Copy, Item: Copy>;
    |                            ----------  ^^^^^^^^^^ re-bound here
@@ -384,7 +360,7 @@ LL | type ETAI5 = impl Iterator<Item: Copy, Item: Copy>;
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:116:43
+  --> $DIR/duplicate.rs:109:43
    |
 LL | type ETAI6 = impl Iterator<Item: 'static, Item: 'static>;
    |                            -------------  ^^^^^^^^^^^^^ re-bound here
@@ -392,7 +368,7 @@ LL | type ETAI6 = impl Iterator<Item: 'static, Item: 'static>;
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:119:36
+  --> $DIR/duplicate.rs:112:36
    |
 LL | trait TRI1<T: Iterator<Item: Copy, Item: Send>> {}
    |                        ----------  ^^^^^^^^^^ re-bound here
@@ -400,7 +376,7 @@ LL | trait TRI1<T: Iterator<Item: Copy, Item: Send>> {}
    |                        `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:121:36
+  --> $DIR/duplicate.rs:114:36
    |
 LL | trait TRI2<T: Iterator<Item: Copy, Item: Copy>> {}
    |                        ----------  ^^^^^^^^^^ re-bound here
@@ -408,7 +384,7 @@ LL | trait TRI2<T: Iterator<Item: Copy, Item: Copy>> {}
    |                        `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:123:39
+  --> $DIR/duplicate.rs:116:39
    |
 LL | trait TRI3<T: Iterator<Item: 'static, Item: 'static>> {}
    |                        -------------  ^^^^^^^^^^^^^ re-bound here
@@ -416,7 +392,7 @@ LL | trait TRI3<T: Iterator<Item: 'static, Item: 'static>> {}
    |                        `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:125:34
+  --> $DIR/duplicate.rs:118:34
    |
 LL | trait TRS1: Iterator<Item: Copy, Item: Send> {}
    |                      ----------  ^^^^^^^^^^ re-bound here
@@ -424,7 +400,7 @@ LL | trait TRS1: Iterator<Item: Copy, Item: Send> {}
    |                      `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:127:34
+  --> $DIR/duplicate.rs:120:34
    |
 LL | trait TRS2: Iterator<Item: Copy, Item: Copy> {}
    |                      ----------  ^^^^^^^^^^ re-bound here
@@ -432,7 +408,7 @@ LL | trait TRS2: Iterator<Item: Copy, Item: Copy> {}
    |                      `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:129:37
+  --> $DIR/duplicate.rs:122:37
    |
 LL | trait TRS3: Iterator<Item: 'static, Item: 'static> {}
    |                      -------------  ^^^^^^^^^^^^^ re-bound here
@@ -440,7 +416,7 @@ LL | trait TRS3: Iterator<Item: 'static, Item: 'static> {}
    |                      `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:131:45
+  --> $DIR/duplicate.rs:124:45
    |
 LL | trait TRW1<T> where T: Iterator<Item: Copy, Item: Send> {}
    |                                 ----------  ^^^^^^^^^^ re-bound here
@@ -448,7 +424,7 @@ LL | trait TRW1<T> where T: Iterator<Item: Copy, Item: Send> {}
    |                                 `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:133:45
+  --> $DIR/duplicate.rs:126:45
    |
 LL | trait TRW2<T> where T: Iterator<Item: Copy, Item: Copy> {}
    |                                 ----------  ^^^^^^^^^^ re-bound here
@@ -456,7 +432,7 @@ LL | trait TRW2<T> where T: Iterator<Item: Copy, Item: Copy> {}
    |                                 `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:135:48
+  --> $DIR/duplicate.rs:128:48
    |
 LL | trait TRW3<T> where T: Iterator<Item: 'static, Item: 'static> {}
    |                                 -------------  ^^^^^^^^^^^^^ re-bound here
@@ -464,7 +440,7 @@ LL | trait TRW3<T> where T: Iterator<Item: 'static, Item: 'static> {}
    |                                 `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:137:46
+  --> $DIR/duplicate.rs:130:46
    |
 LL | trait TRSW1 where Self: Iterator<Item: Copy, Item: Send> {}
    |                                  ----------  ^^^^^^^^^^ re-bound here
@@ -472,7 +448,7 @@ LL | trait TRSW1 where Self: Iterator<Item: Copy, Item: Send> {}
    |                                  `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:137:46
+  --> $DIR/duplicate.rs:130:46
    |
 LL | trait TRSW1 where Self: Iterator<Item: Copy, Item: Send> {}
    |                                  ----------  ^^^^^^^^^^ re-bound here
@@ -480,7 +456,7 @@ LL | trait TRSW1 where Self: Iterator<Item: Copy, Item: Send> {}
    |                                  `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:140:46
+  --> $DIR/duplicate.rs:133:46
    |
 LL | trait TRSW2 where Self: Iterator<Item: Copy, Item: Copy> {}
    |                                  ----------  ^^^^^^^^^^ re-bound here
@@ -488,7 +464,7 @@ LL | trait TRSW2 where Self: Iterator<Item: Copy, Item: Copy> {}
    |                                  `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:140:46
+  --> $DIR/duplicate.rs:133:46
    |
 LL | trait TRSW2 where Self: Iterator<Item: Copy, Item: Copy> {}
    |                                  ----------  ^^^^^^^^^^ re-bound here
@@ -496,7 +472,7 @@ LL | trait TRSW2 where Self: Iterator<Item: Copy, Item: Copy> {}
    |                                  `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:143:49
+  --> $DIR/duplicate.rs:136:49
    |
 LL | trait TRSW3 where Self: Iterator<Item: 'static, Item: 'static> {}
    |                                  -------------  ^^^^^^^^^^^^^ re-bound here
@@ -504,7 +480,7 @@ LL | trait TRSW3 where Self: Iterator<Item: 'static, Item: 'static> {}
    |                                  `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:143:49
+  --> $DIR/duplicate.rs:136:49
    |
 LL | trait TRSW3 where Self: Iterator<Item: 'static, Item: 'static> {}
    |                                  -------------  ^^^^^^^^^^^^^ re-bound here
@@ -512,7 +488,7 @@ LL | trait TRSW3 where Self: Iterator<Item: 'static, Item: 'static> {}
    |                                  `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:153:40
+  --> $DIR/duplicate.rs:146:40
    |
 LL | type TADyn1 = dyn Iterator<Item: Copy, Item: Send>;
    |                            ----------  ^^^^^^^^^^ re-bound here
@@ -520,7 +496,7 @@ LL | type TADyn1 = dyn Iterator<Item: Copy, Item: Send>;
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:155:44
+  --> $DIR/duplicate.rs:148:44
    |
 LL | type TADyn2 = Box<dyn Iterator<Item: Copy, Item: Copy>>;
    |                                ----------  ^^^^^^^^^^ re-bound here
@@ -528,7 +504,7 @@ LL | type TADyn2 = Box<dyn Iterator<Item: Copy, Item: Copy>>;
    |                                `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:157:43
+  --> $DIR/duplicate.rs:150:43
    |
 LL | type TADyn3 = dyn Iterator<Item: 'static, Item: 'static>;
    |                            -------------  ^^^^^^^^^^^^^ re-bound here
@@ -536,7 +512,7 @@ LL | type TADyn3 = dyn Iterator<Item: 'static, Item: 'static>;
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:146:43
+  --> $DIR/duplicate.rs:139:43
    |
 LL | trait TRA1 { type A: Iterator<Item: Copy, Item: Send>; }
    |                               ----------  ^^^^^^^^^^ re-bound here
@@ -544,7 +520,7 @@ LL | trait TRA1 { type A: Iterator<Item: Copy, Item: Send>; }
    |                               `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:148:43
+  --> $DIR/duplicate.rs:141:43
    |
 LL | trait TRA2 { type A: Iterator<Item: Copy, Item: Copy>; }
    |                               ----------  ^^^^^^^^^^ re-bound here
@@ -552,13 +528,13 @@ LL | trait TRA2 { type A: Iterator<Item: Copy, Item: Copy>; }
    |                               `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:150:46
+  --> $DIR/duplicate.rs:143:46
    |
 LL | trait TRA3 { type A: Iterator<Item: 'static, Item: 'static>; }
    |                               -------------  ^^^^^^^^^^^^^ re-bound here
    |                               |
    |                               `Item` bound here first
 
-error: aborting due to 69 previous errors; 1 warning emitted
+error: aborting due to 66 previous errors; 1 warning emitted
 
 For more information about this error, try `rustc --explain E0719`.
diff --git a/src/test/ui/associated-type-bounds/duplicate.rs b/src/test/ui/associated-type-bounds/duplicate.rs
index c3319a7050d..bb535e0add7 100644
--- a/src/test/ui/associated-type-bounds/duplicate.rs
+++ b/src/test/ui/associated-type-bounds/duplicate.rs
@@ -83,13 +83,6 @@ fn FAPIT3(_: impl Iterator<Item: 'static, Item: 'static>) {}
 static SIT3: impl Iterator<Item: 'static, Item: 'static> = iter::empty();
 //~^ ERROR the value of the associated type `Item` (from trait `Iterator`) is already specified [E0719]
 
-fn lit1() { let _: impl Iterator<Item: Copy, Item: Send> = iter::empty(); }
-//~^ ERROR the value of the associated type `Item` (from trait `Iterator`) is already specified [E0719]
-fn lit2() { let _: impl Iterator<Item: Copy, Item: Copy> = iter::empty(); }
-//~^ ERROR the value of the associated type `Item` (from trait `Iterator`) is already specified [E0719]
-fn lit3() { let _: impl Iterator<Item: 'static, Item: 'static> = iter::empty(); }
-//~^ ERROR the value of the associated type `Item` (from trait `Iterator`) is already specified [E0719]
-
 type TAI1<T: Iterator<Item: Copy, Item: Send>> = T;
 //~^ ERROR the value of the associated type `Item` (from trait `Iterator`) is already specified [E0719]
 type TAI2<T: Iterator<Item: Copy, Item: Copy>> = T;
diff --git a/src/test/ui/associated-type-bounds/lcsit.rs b/src/test/ui/associated-type-bounds/lcsit.rs
deleted file mode 100644
index 5364f25f89a..00000000000
--- a/src/test/ui/associated-type-bounds/lcsit.rs
+++ /dev/null
@@ -1,78 +0,0 @@
-// run-pass
-
-#![feature(associated_type_bounds)]
-#![feature(impl_trait_in_bindings)]
-//~^ WARNING `impl_trait_in_bindings` is incomplete
-#![allow(non_upper_case_globals)]
-
-use std::ops::Add;
-
-trait Tr1 { type As1; fn mk(&self) -> Self::As1; }
-trait Tr2<'a> { fn tr2(self) -> &'a Self; }
-
-fn assert_copy<T: Copy>(x: T) { let _x = x; let _x = x; }
-fn assert_static<T: 'static>(_: T) {}
-fn assert_forall_tr2<T: for<'a> Tr2<'a>>(_: T) {}
-
-#[derive(Copy, Clone)]
-struct S1;
-#[derive(Copy, Clone)]
-struct S2;
-impl Tr1 for S1 { type As1 = S2; fn mk(&self) -> Self::As1 { S2 } }
-
-const cdef_et1: impl Copy + Tr1<As1: Copy> = {
-    let x: impl Copy + Tr1<As1: Copy> = S1;
-    x
-};
-static sdef_et1: impl Copy + Tr1<As1: Copy> = cdef_et1;
-pub fn use_et1() { assert_copy(cdef_et1.mk()); assert_copy(sdef_et1.mk()); }
-
-const cdef_et2: impl Tr1<As1: 'static> = {
-    let x: impl Tr1<As1: 'static> = S1;
-    x
-};
-static sdef_et2: impl Tr1<As1: 'static> = cdef_et2;
-pub fn use_et2() { assert_static(cdef_et2.mk()); assert_static(sdef_et2.mk()); }
-
-const cdef_et3: impl Tr1<As1: Clone + Iterator<Item: Add<u8, Output: Into<u8>>>> = {
-    struct A;
-    impl Tr1 for A {
-        type As1 = core::ops::Range<u8>;
-        fn mk(&self) -> Self::As1 { 0..10 }
-    }
-    let x: impl Tr1<As1: Clone + Iterator<Item: Add<u8, Output: Into<u8>>>> = A;
-    x
-};
-pub fn use_et3() {
-    let _0 = cdef_et3.mk().clone();
-    let mut s = 0u8;
-    for _1 in _0 {
-        let _2 = _1 + 1u8;
-        s += _2.into();
-    }
-    assert_eq!(s, (0..10).map(|x| x + 1).sum());
-}
-
-const cdef_et4: impl Copy + Tr1<As1: for<'a> Tr2<'a>> = {
-    #[derive(Copy, Clone)]
-    struct A;
-    impl Tr1 for A {
-        type As1 = A;
-        fn mk(&self) -> A { A }
-    }
-    impl<'a> Tr2<'a> for A {
-        fn tr2(self) -> &'a Self { &A }
-    }
-    let x: impl Copy + Tr1<As1: for<'a> Tr2<'a>> = A;
-    x
-};
-
-static sdef_et4: impl Copy + Tr1<As1: for<'a> Tr2<'a>> = cdef_et4;
-pub fn use_et4() { assert_forall_tr2(cdef_et4.mk()); assert_forall_tr2(sdef_et4.mk()); }
-
-fn main() {
-    let _ = use_et1();
-    let _ = use_et2();
-    let _ = use_et3();
-    let _ = use_et4();
-}
diff --git a/src/test/ui/associated-type-bounds/lcsit.stderr b/src/test/ui/associated-type-bounds/lcsit.stderr
deleted file mode 100644
index 11ff03db361..00000000000
--- a/src/test/ui/associated-type-bounds/lcsit.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-warning: the feature `impl_trait_in_bindings` is incomplete and may not be safe to use and/or cause compiler crashes
-  --> $DIR/lcsit.rs:4:12
-   |
-LL | #![feature(impl_trait_in_bindings)]
-   |            ^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: `#[warn(incomplete_features)]` on by default
-   = note: see issue #63065 <https://github.com/rust-lang/rust/issues/63065> for more information
-
-warning: 1 warning emitted
-
diff --git a/src/test/ui/feature-gates/feature-gate-impl_trait_in_bindings.rs b/src/test/ui/feature-gates/feature-gate-impl_trait_in_bindings.rs
deleted file mode 100644
index 39cc64f11a7..00000000000
--- a/src/test/ui/feature-gates/feature-gate-impl_trait_in_bindings.rs
+++ /dev/null
@@ -1,11 +0,0 @@
-const FOO: impl Copy = 42;
-//~^ ERROR `impl Trait` not allowed
-
-static BAR: impl Copy = 42;
-//~^ ERROR `impl Trait` not allowed
-
-fn main() {
-    let foo = impl Copy = 42;
-//~^ ERROR expected expression, found keyword `impl`
-    let foo: impl Copy = 42;
-}
diff --git a/src/test/ui/feature-gates/feature-gate-impl_trait_in_bindings.stderr b/src/test/ui/feature-gates/feature-gate-impl_trait_in_bindings.stderr
deleted file mode 100644
index bd648b40590..00000000000
--- a/src/test/ui/feature-gates/feature-gate-impl_trait_in_bindings.stderr
+++ /dev/null
@@ -1,25 +0,0 @@
-error: expected expression, found keyword `impl`
-  --> $DIR/feature-gate-impl_trait_in_bindings.rs:8:15
-   |
-LL |     let foo = impl Copy = 42;
-   |               ^^^^ expected expression
-
-error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
-  --> $DIR/feature-gate-impl_trait_in_bindings.rs:1:12
-   |
-LL | const FOO: impl Copy = 42;
-   |            ^^^^^^^^^
-   |
-   = help: add `#![feature(impl_trait_in_bindings)]` to the crate attributes to enable
-
-error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
-  --> $DIR/feature-gate-impl_trait_in_bindings.rs:4:13
-   |
-LL | static BAR: impl Copy = 42;
-   |             ^^^^^^^^^
-   |
-   = help: add `#![feature(impl_trait_in_bindings)]` to the crate attributes to enable
-
-error: aborting due to 3 previous errors
-
-For more information about this error, try `rustc --explain E0562`.
diff --git a/src/test/ui/impl-trait/binding-without-value.rs b/src/test/ui/impl-trait/binding-without-value.rs
deleted file mode 100644
index 6a97f28ff55..00000000000
--- a/src/test/ui/impl-trait/binding-without-value.rs
+++ /dev/null
@@ -1,9 +0,0 @@
-#![allow(incomplete_features)]
-#![feature(impl_trait_in_bindings)]
-
-fn foo() {
-    let _ : impl Copy;
-    //~^ ERROR cannot resolve opaque type
-}
-
-fn main() {}
diff --git a/src/test/ui/impl-trait/binding-without-value.stderr b/src/test/ui/impl-trait/binding-without-value.stderr
deleted file mode 100644
index 0d2faeaf85d..00000000000
--- a/src/test/ui/impl-trait/binding-without-value.stderr
+++ /dev/null
@@ -1,16 +0,0 @@
-error[E0720]: cannot resolve opaque type
-  --> $DIR/binding-without-value.rs:5:13
-   |
-LL |     let _ : impl Copy;
-   |         -   ^^^^^^^^^ cannot resolve opaque type
-   |         |
-   |         this binding might not have a concrete type
-   |
-help: set the binding to a value for a concrete type to be resolved
-   |
-LL |     let _ : impl Copy = /* value */;
-   |                       ^^^^^^^^^^^^^
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0720`.
diff --git a/src/test/ui/impl-trait/bindings-opaque.rs b/src/test/ui/impl-trait/bindings-opaque.rs
deleted file mode 100644
index d1f42be077d..00000000000
--- a/src/test/ui/impl-trait/bindings-opaque.rs
+++ /dev/null
@@ -1,17 +0,0 @@
-#![feature(impl_trait_in_bindings)]
-//~^ WARN the feature `impl_trait_in_bindings` is incomplete
-
-const FOO: impl Copy = 42;
-
-static BAR: impl Copy = 42;
-
-fn main() {
-    let foo: impl Copy = 42;
-
-    let _ = FOO.count_ones();
-//~^ ERROR no method
-    let _ = BAR.count_ones();
-//~^ ERROR no method
-    let _ = foo.count_ones();
-//~^ ERROR no method
-}
diff --git a/src/test/ui/impl-trait/bindings-opaque.stderr b/src/test/ui/impl-trait/bindings-opaque.stderr
deleted file mode 100644
index 170bd461234..00000000000
--- a/src/test/ui/impl-trait/bindings-opaque.stderr
+++ /dev/null
@@ -1,30 +0,0 @@
-warning: the feature `impl_trait_in_bindings` is incomplete and may not be safe to use and/or cause compiler crashes
-  --> $DIR/bindings-opaque.rs:1:12
-   |
-LL | #![feature(impl_trait_in_bindings)]
-   |            ^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: `#[warn(incomplete_features)]` on by default
-   = note: see issue #63065 <https://github.com/rust-lang/rust/issues/63065> for more information
-
-error[E0599]: no method named `count_ones` found for opaque type `impl Copy` in the current scope
-  --> $DIR/bindings-opaque.rs:11:17
-   |
-LL |     let _ = FOO.count_ones();
-   |                 ^^^^^^^^^^ method not found in `impl Copy`
-
-error[E0599]: no method named `count_ones` found for opaque type `impl Copy` in the current scope
-  --> $DIR/bindings-opaque.rs:13:17
-   |
-LL |     let _ = BAR.count_ones();
-   |                 ^^^^^^^^^^ method not found in `impl Copy`
-
-error[E0599]: no method named `count_ones` found for opaque type `impl Copy` in the current scope
-  --> $DIR/bindings-opaque.rs:15:17
-   |
-LL |     let _ = foo.count_ones();
-   |                 ^^^^^^^^^^ method not found in `impl Copy`
-
-error: aborting due to 3 previous errors; 1 warning emitted
-
-For more information about this error, try `rustc --explain E0599`.
diff --git a/src/test/ui/impl-trait/bound-normalization-pass.rs b/src/test/ui/impl-trait/bound-normalization-pass.rs
index 6a01753b4c2..5144f05681b 100644
--- a/src/test/ui/impl-trait/bound-normalization-pass.rs
+++ b/src/test/ui/impl-trait/bound-normalization-pass.rs
@@ -14,7 +14,9 @@
 
 struct Foo<T>(T);
 
-trait FooLike { type Output; }
+trait FooLike {
+    type Output;
+}
 
 impl<T> FooLike for Foo<T> {
     type Output = T;
@@ -28,7 +30,7 @@ trait Trait {
     }
 
     /// `T::Assoc` should be normalized to `()` here.
-    fn foo_pass<T: Trait<Assoc=()>>() -> impl FooLike<Output=T::Assoc> {
+    fn foo_pass<T: Trait<Assoc = ()>>() -> impl FooLike<Output = T::Assoc> {
         Foo(())
     }
 }
@@ -45,40 +47,20 @@ trait Trait<'a> {
     /// Like above.
     ///
     /// FIXME(#51525) -- the shorter notation `T::Assoc` winds up referencing `'static` here
-    fn foo2_pass<'a, T: Trait<'a, Assoc=()> + 'a>(
-    ) -> impl FooLike<Output=<T as Trait<'a>>::Assoc> + 'a {
+    fn foo2_pass<'a, T: Trait<'a, Assoc = ()> + 'a>()
+    -> impl FooLike<Output = <T as Trait<'a>>::Assoc> + 'a {
         Foo(())
     }
 
     /// Normalization to type containing bound region.
     ///
     /// FIXME(#51525) -- the shorter notation `T::Assoc` winds up referencing `'static` here
-    fn foo2_pass2<'a, T: Trait<'a, Assoc=&'a ()> + 'a>(
-    ) -> impl FooLike<Output=<T as Trait<'a>>::Assoc> + 'a {
+    fn foo2_pass2<'a, T: Trait<'a, Assoc = &'a ()> + 'a>()
+    -> impl FooLike<Output = <T as Trait<'a>>::Assoc> + 'a {
         Foo(&())
     }
 }
 
-// Reduction using `impl Trait` in bindings
-
-mod impl_trait_in_bindings {
-    struct Foo;
-
-    trait FooLike { type Output; }
-
-    impl FooLike for Foo {
-        type Output = u32;
-    }
-
-    trait Trait {
-        type Assoc;
-    }
-
-    fn foo<T: Trait<Assoc=u32>>() {
-        let _: impl FooLike<Output=T::Assoc> = Foo;
-    }
-}
-
 // The same applied to `type Foo = impl Bar`s
 
 mod opaque_types {
diff --git a/src/test/ui/impl-trait/impl-trait-in-bindings-issue-73003.rs b/src/test/ui/impl-trait/impl-trait-in-bindings-issue-73003.rs
deleted file mode 100644
index fd8fe5f48df..00000000000
--- a/src/test/ui/impl-trait/impl-trait-in-bindings-issue-73003.rs
+++ /dev/null
@@ -1,8 +0,0 @@
-// check-pass
-
-#![feature(impl_trait_in_bindings)]
-//~^ WARN the feature `impl_trait_in_bindings` is incomplete
-
-const _: impl Fn() = ||();
-
-fn main() {}
diff --git a/src/test/ui/impl-trait/impl-trait-in-bindings-issue-73003.stderr b/src/test/ui/impl-trait/impl-trait-in-bindings-issue-73003.stderr
deleted file mode 100644
index 715671c8add..00000000000
--- a/src/test/ui/impl-trait/impl-trait-in-bindings-issue-73003.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-warning: the feature `impl_trait_in_bindings` is incomplete and may not be safe to use and/or cause compiler crashes
-  --> $DIR/impl-trait-in-bindings-issue-73003.rs:3:12
-   |
-LL | #![feature(impl_trait_in_bindings)]
-   |            ^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: `#[warn(incomplete_features)]` on by default
-   = note: see issue #63065 <https://github.com/rust-lang/rust/issues/63065> for more information
-
-warning: 1 warning emitted
-
diff --git a/src/test/ui/impl-trait/impl-trait-in-bindings.rs b/src/test/ui/impl-trait/impl-trait-in-bindings.rs
deleted file mode 100644
index c7fae45d5ca..00000000000
--- a/src/test/ui/impl-trait/impl-trait-in-bindings.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-// run-pass
-
-#![feature(impl_trait_in_bindings)]
-//~^ WARN the feature `impl_trait_in_bindings` is incomplete
-
-use std::fmt::Debug;
-
-const FOO: impl Debug + Clone + PartialEq<i32> = 42;
-
-static BAR: impl Debug + Clone + PartialEq<i32> = 42;
-
-fn a<T: Clone>(x: T) {
-    let y: impl Clone = x;
-    let _ = y.clone();
-}
-
-fn b<T: Clone>(x: T) {
-    let f = move || {
-        let y: impl Clone = x;
-        let _ = y.clone();
-    };
-    f();
-}
-
-trait Foo<T: Clone> {
-    fn a(x: T) {
-        let y: impl Clone = x;
-        let _ = y.clone();
-    }
-}
-
-impl<T: Clone> Foo<T> for i32 {
-    fn a(x: T) {
-        let y: impl Clone = x;
-        let _ = y.clone();
-    }
-}
-
-fn main() {
-    let foo: impl Debug + Clone + PartialEq<i32> = 42;
-
-    assert_eq!(FOO.clone(), 42);
-    assert_eq!(BAR.clone(), 42);
-    assert_eq!(foo.clone(), 42);
-
-    a(42);
-    b(42);
-    i32::a(42);
-}
diff --git a/src/test/ui/impl-trait/impl-trait-in-bindings.stderr b/src/test/ui/impl-trait/impl-trait-in-bindings.stderr
deleted file mode 100644
index bf739d4722f..00000000000
--- a/src/test/ui/impl-trait/impl-trait-in-bindings.stderr
+++ /dev/null
@@ -1,11 +0,0 @@
-warning: the feature `impl_trait_in_bindings` is incomplete and may not be safe to use and/or cause compiler crashes
-  --> $DIR/impl-trait-in-bindings.rs:3:12
-   |
-LL | #![feature(impl_trait_in_bindings)]
-   |            ^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: `#[warn(incomplete_features)]` on by default
-   = note: see issue #63065 <https://github.com/rust-lang/rust/issues/63065> for more information
-
-warning: 1 warning emitted
-
diff --git a/src/test/ui/impl-trait/issue-57200.rs b/src/test/ui/impl-trait/issue-57200.rs
deleted file mode 100644
index e0c71d1ac9a..00000000000
--- a/src/test/ui/impl-trait/issue-57200.rs
+++ /dev/null
@@ -1,15 +0,0 @@
-// Regression test for #57200
-// FIXME: The error is temporary hack, we'll revisit here at some point.
-
-#![feature(impl_trait_in_bindings)]
-#![allow(incomplete_features)]
-
-fn bug<'a, 'b, T>()
-where
-    'a: 'b,
-{
-    let f: impl Fn(&'a T) -> &'b T = |x| x;
-    //~^ ERROR: lifetimes in impl Trait types in bindings are not currently supported
-}
-
-fn main() {}
diff --git a/src/test/ui/impl-trait/issue-57200.stderr b/src/test/ui/impl-trait/issue-57200.stderr
deleted file mode 100644
index b44f332d58c..00000000000
--- a/src/test/ui/impl-trait/issue-57200.stderr
+++ /dev/null
@@ -1,8 +0,0 @@
-error: lifetimes in impl Trait types in bindings are not currently supported
-  --> $DIR/issue-57200.rs:11:12
-   |
-LL |     let f: impl Fn(&'a T) -> &'b T = |x| x;
-   |            ^^^^^^^^^^^^^^^^^^^^^^^
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/impl-trait/issue-57201.rs b/src/test/ui/impl-trait/issue-57201.rs
deleted file mode 100644
index c1a98d8897b..00000000000
--- a/src/test/ui/impl-trait/issue-57201.rs
+++ /dev/null
@@ -1,15 +0,0 @@
-// Regression test for #57201
-// FIXME: The error is temporary hack, we'll revisit here at some point.
-
-#![feature(impl_trait_in_bindings)]
-#![allow(incomplete_features)]
-
-fn bug<'a, 'b, T>()
-where
-    'a: 'b,
-{
-    let f: &impl Fn(&'a T) -> &'b T = &|x| x;
-    //~^ ERROR: lifetimes in impl Trait types in bindings are not currently supported
-}
-
-fn main() {}
diff --git a/src/test/ui/impl-trait/issue-57201.stderr b/src/test/ui/impl-trait/issue-57201.stderr
deleted file mode 100644
index 462b17bf45e..00000000000
--- a/src/test/ui/impl-trait/issue-57201.stderr
+++ /dev/null
@@ -1,8 +0,0 @@
-error: lifetimes in impl Trait types in bindings are not currently supported
-  --> $DIR/issue-57201.rs:11:13
-   |
-LL |     let f: &impl Fn(&'a T) -> &'b T = &|x| x;
-   |             ^^^^^^^^^^^^^^^^^^^^^^^
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/impl-trait/issue-60473.rs b/src/test/ui/impl-trait/issue-60473.rs
deleted file mode 100644
index 2ef86f03d34..00000000000
--- a/src/test/ui/impl-trait/issue-60473.rs
+++ /dev/null
@@ -1,15 +0,0 @@
-// Regression test for #60473
-
-#![feature(impl_trait_in_bindings)]
-#![allow(incomplete_features)]
-
-struct A<'a>(&'a ());
-
-trait Trait<T> {}
-
-impl<T> Trait<T> for () {}
-
-fn main() {
-    let x: impl Trait<A> = ();
-    //~^ ERROR: missing lifetime specifier
-}
diff --git a/src/test/ui/impl-trait/issue-60473.stderr b/src/test/ui/impl-trait/issue-60473.stderr
deleted file mode 100644
index 367b5db5d2d..00000000000
--- a/src/test/ui/impl-trait/issue-60473.stderr
+++ /dev/null
@@ -1,15 +0,0 @@
-error[E0106]: missing lifetime specifier
-  --> $DIR/issue-60473.rs:13:23
-   |
-LL |     let x: impl Trait<A> = ();
-   |                       ^ expected named lifetime parameter
-   |
-help: consider introducing a named lifetime parameter
-   |
-LL | fn main<'a>() {
-LL |     let x: impl Trait<A<'a>> = ();
-   |
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0106`.
diff --git a/src/test/ui/impl-trait/issue-67166.rs b/src/test/ui/impl-trait/issue-67166.rs
deleted file mode 100644
index efa67558bd7..00000000000
--- a/src/test/ui/impl-trait/issue-67166.rs
+++ /dev/null
@@ -1,11 +0,0 @@
-// Regression test for #67166
-
-#![feature(impl_trait_in_bindings)]
-#![allow(incomplete_features)]
-
-pub fn run() {
-    let _foo: Box<impl Copy + '_> = Box::new(());
-    //~^ ERROR: missing lifetime specifier
-}
-
-fn main() {}
diff --git a/src/test/ui/impl-trait/issue-67166.stderr b/src/test/ui/impl-trait/issue-67166.stderr
deleted file mode 100644
index 14c78684e3e..00000000000
--- a/src/test/ui/impl-trait/issue-67166.stderr
+++ /dev/null
@@ -1,15 +0,0 @@
-error[E0106]: missing lifetime specifier
-  --> $DIR/issue-67166.rs:7:31
-   |
-LL |     let _foo: Box<impl Copy + '_> = Box::new(());
-   |                               ^^ expected named lifetime parameter
-   |
-help: consider introducing a named lifetime parameter
-   |
-LL | pub fn run<'a>() {
-LL |     let _foo: Box<impl Copy + 'a> = Box::new(());
-   |
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0106`.
diff --git a/src/test/ui/impl-trait/issue-69840.rs b/src/test/ui/impl-trait/issue-69840.rs
deleted file mode 100644
index b270f88b688..00000000000
--- a/src/test/ui/impl-trait/issue-69840.rs
+++ /dev/null
@@ -1,16 +0,0 @@
-// check-pass
-
-#![feature(impl_trait_in_bindings)]
-#![allow(incomplete_features)]
-
-struct A<'a>(&'a ());
-
-trait Trait<T> {}
-
-impl<T> Trait<T> for () {}
-
-pub fn foo<'a>() {
-    let _x: impl Trait<A<'a>> = ();
-}
-
-fn main() {}
diff --git a/src/test/ui/impl-trait/issues/issue-78721.rs b/src/test/ui/impl-trait/issues/issue-78721.rs
deleted file mode 100644
index f7dbef9e3ff..00000000000
--- a/src/test/ui/impl-trait/issues/issue-78721.rs
+++ /dev/null
@@ -1,15 +0,0 @@
-// edition:2018
-
-#![feature(impl_trait_in_bindings)]
-//~^ WARN the feature `impl_trait_in_bindings` is incomplete
-
-struct Bug {
-    V1: [(); {
-        let f: impl core::future::Future<Output = u8> = async { 1 };
-        //~^ ERROR `async` blocks are not allowed in constants
-        //~| ERROR destructors cannot be evaluated at compile-time
-        1
-    }],
-}
-
-fn main() {}
diff --git a/src/test/ui/impl-trait/issues/issue-78721.stderr b/src/test/ui/impl-trait/issues/issue-78721.stderr
deleted file mode 100644
index d5712dd9200..00000000000
--- a/src/test/ui/impl-trait/issues/issue-78721.stderr
+++ /dev/null
@@ -1,31 +0,0 @@
-warning: the feature `impl_trait_in_bindings` is incomplete and may not be safe to use and/or cause compiler crashes
-  --> $DIR/issue-78721.rs:3:12
-   |
-LL | #![feature(impl_trait_in_bindings)]
-   |            ^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: `#[warn(incomplete_features)]` on by default
-   = note: see issue #63065 <https://github.com/rust-lang/rust/issues/63065> for more information
-
-error[E0658]: `async` blocks are not allowed in constants
-  --> $DIR/issue-78721.rs:8:57
-   |
-LL |         let f: impl core::future::Future<Output = u8> = async { 1 };
-   |                                                         ^^^^^^^^^^^
-   |
-   = note: see issue #85368 <https://github.com/rust-lang/rust/issues/85368> for more information
-   = help: add `#![feature(const_async_blocks)]` to the crate attributes to enable
-
-error[E0493]: destructors cannot be evaluated at compile-time
-  --> $DIR/issue-78721.rs:8:13
-   |
-LL |         let f: impl core::future::Future<Output = u8> = async { 1 };
-   |             ^ constants cannot evaluate destructors
-...
-LL |     }],
-   |     - value is dropped here
-
-error: aborting due to 2 previous errors; 1 warning emitted
-
-Some errors have detailed explanations: E0493, E0658.
-For more information about an error, try `rustc --explain E0493`.