3 files changed, 13 insertions, 12 deletions
diff --git a/compiler/rustc_middle/src/error.rs b/compiler/rustc_middle/src/error.rs
index 43903e6739f..5e94da8cb4d 100644
--- a/compiler/rustc_middle/src/error.rs
+++ b/compiler/rustc_middle/src/error.rs
@@ -64,3 +64,11 @@ pub(crate) struct StrictCoherenceNeedsNegativeCoherence {
     #[label]
     pub attr_span: Option<Span>,
 }
+
+#[derive(Diagnostic)]
+#[diag(middle_const_not_used_in_type_alias)]
+pub(super) struct ConstNotUsedTraitAlias {
+    pub ct: String,
+    #[primary_span]
+    pub span: Span,
+}
diff --git a/compiler/rustc_middle/src/ty/diagnostics.rs b/compiler/rustc_middle/src/ty/diagnostics.rs
index 029ee15d68d..69f50df6235 100644
--- a/compiler/rustc_middle/src/ty/diagnostics.rs
+++ b/compiler/rustc_middle/src/ty/diagnostics.rs
@@ -508,11 +508,3 @@ impl<'tcx> TypeVisitor<'tcx> for IsSuggestableVisitor<'tcx> {
         c.super_visit_with(self)
     }
 }
-
-#[derive(Diagnostic)]
-#[diag(borrowck_const_not_used_in_type_alias)]
-pub(super) struct ConstNotUsedTraitAlias {
-    pub ct: String,
-    #[primary_span]
-    pub span: Span,
-}
diff --git a/compiler/rustc_middle/src/ty/opaque_types.rs b/compiler/rustc_middle/src/ty/opaque_types.rs
index b05c6310929..98cd92007c2 100644
--- a/compiler/rustc_middle/src/ty/opaque_types.rs
+++ b/compiler/rustc_middle/src/ty/opaque_types.rs
@@ -1,7 +1,8 @@
+use crate::error::ConstNotUsedTraitAlias;
+use crate::ty::fold::{TypeFolder, TypeSuperFoldable};
+use crate::ty::subst::{GenericArg, GenericArgKind};
+use crate::ty::{self, Ty, TyCtxt, TypeFoldable};
 use rustc_data_structures::fx::FxHashMap;
-use rustc_middle::ty::fold::{TypeFolder, TypeSuperFoldable};
-use rustc_middle::ty::subst::{GenericArg, GenericArgKind};
-use rustc_middle::ty::{self, Ty, TyCtxt, TypeFoldable};
 use rustc_span::Span;
 
 /// Converts generic params of a TypeFoldable from one
@@ -201,7 +202,7 @@ impl<'tcx> TypeFolder<'tcx> for ReverseMapper<'tcx> {
                     Some(u) => panic!("const mapped to unexpected kind: {:?}", u),
                     None => {
                         if !self.ignore_errors {
-                            self.tcx.sess.emit_err(ty::ConstNotUsedTraitAlias {
+                            self.tcx.sess.emit_err(ConstNotUsedTraitAlias {
                                 ct: ct.to_string(),
                                 span: self.span,
                             });