3 files changed, 10 insertions, 5 deletions
diff --git a/compiler/rustc_ast_lowering/src/errors.rs b/compiler/rustc_ast_lowering/src/errors.rs
index 710690d0d86..faa22eece38 100644
--- a/compiler/rustc_ast_lowering/src/errors.rs
+++ b/compiler/rustc_ast_lowering/src/errors.rs
@@ -90,6 +90,7 @@ pub enum AssocTyParenthesesSub {
 
 #[derive(Diagnostic)]
 #[diag(ast_lowering_misplaced_impl_trait, code = "E0562")]
+#[note]
 pub struct MisplacedImplTrait<'a> {
     #[primary_span]
     pub span: Span,
diff --git a/compiler/rustc_ast_lowering/src/item.rs b/compiler/rustc_ast_lowering/src/item.rs
index c618953461c..7fd7d9489b0 100644
--- a/compiler/rustc_ast_lowering/src/item.rs
+++ b/compiler/rustc_ast_lowering/src/item.rs
@@ -182,7 +182,8 @@ impl<'hir> LoweringContext<'_, 'hir> {
                 self.lower_use_tree(use_tree, &prefix, id, vis_span, ident, attrs)
             }
             ItemKind::Static(box ast::StaticItem { ty: t, mutability: m, expr: e }) => {
-                let (ty, body_id) = self.lower_const_item(t, span, e.as_deref());
+                let (ty, body_id) =
+                    self.lower_const_item(t, span, e.as_deref(), ImplTraitPosition::StaticTy);
                 hir::ItemKind::Static(ty, *m, body_id)
             }
             ItemKind::Const(box ast::ConstItem { generics, ty, expr, .. }) => {
@@ -191,7 +192,9 @@ impl<'hir> LoweringContext<'_, 'hir> {
                     Const::No,
                     id,
                     &ImplTraitContext::Disallowed(ImplTraitPosition::Generic),
-                    |this| this.lower_const_item(ty, span, expr.as_deref()),
+                    |this| {
+                        this.lower_const_item(ty, span, expr.as_deref(), ImplTraitPosition::ConstTy)
+                    },
                 );
                 hir::ItemKind::Const(ty, generics, body_id)
             }
@@ -448,8 +451,9 @@ impl<'hir> LoweringContext<'_, 'hir> {
         ty: &Ty,
         span: Span,
         body: Option<&Expr>,
+        impl_trait_position: ImplTraitPosition,
     ) -> (&'hir hir::Ty<'hir>, hir::BodyId) {
-        let ty = self.lower_ty(ty, &ImplTraitContext::Disallowed(ImplTraitPosition::ConstTy));
+        let ty = self.lower_ty(ty, &ImplTraitContext::Disallowed(impl_trait_position));
         (ty, self.lower_const_body(span, body))
     }
 
diff --git a/compiler/rustc_ast_lowering/src/lib.rs b/compiler/rustc_ast_lowering/src/lib.rs
index 998a7322fa0..dc23b1dce7b 100644
--- a/compiler/rustc_ast_lowering/src/lib.rs
+++ b/compiler/rustc_ast_lowering/src/lib.rs
@@ -322,7 +322,7 @@ impl std::fmt::Display for ImplTraitPosition {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         let name = match self {
             ImplTraitPosition::Path => "paths",
-            ImplTraitPosition::Variable => "variable bindings",
+            ImplTraitPosition::Variable => "the type of variable bindings",
             ImplTraitPosition::Trait => "traits",
             ImplTraitPosition::AsyncBlock => "async blocks",
             ImplTraitPosition::Bound => "bounds",
@@ -334,7 +334,7 @@ impl std::fmt::Display for ImplTraitPosition {
             ImplTraitPosition::ExternFnReturn => "`extern fn` return types",
             ImplTraitPosition::ClosureReturn => "closure return types",
             ImplTraitPosition::PointerReturn => "`fn` pointer return types",
-            ImplTraitPosition::FnTraitReturn => "the return types of `Fn` trait bounds",
+            ImplTraitPosition::FnTraitReturn => "the return type of `Fn` trait bounds",
             ImplTraitPosition::GenericDefault => "generic parameter defaults",
             ImplTraitPosition::ConstTy => "const types",
             ImplTraitPosition::StaticTy => "static types",