2 files changed, 5 insertions, 2 deletions
diff --git a/compiler/rustc_ty_utils/src/implied_bounds.rs b/compiler/rustc_ty_utils/src/implied_bounds.rs
index 5cd10e90538..c4637f1293c 100644
--- a/compiler/rustc_ty_utils/src/implied_bounds.rs
+++ b/compiler/rustc_ty_utils/src/implied_bounds.rs
@@ -6,6 +6,7 @@ use rustc_hir::def::DefKind;
 use rustc_hir::def_id::LocalDefId;
 use rustc_middle::bug;
 use rustc_middle::query::Providers;
+use rustc_middle::ty::fold::fold_regions;
 use rustc_middle::ty::{self, Ty, TyCtxt};
 use rustc_span::Span;
 
@@ -86,7 +87,8 @@ fn assumed_wf_types<'tcx>(tcx: TyCtxt<'tcx>, def_id: LocalDefId) -> &'tcx [(Ty<'
                         }
                     }
                     // FIXME: This could use a real folder, I guess.
-                    let remapped_wf_tys = tcx.fold_regions(
+                    let remapped_wf_tys = fold_regions(
+                        tcx,
                         tcx.assumed_wf_types(fn_def_id.expect_local()).to_vec(),
                         |region, _| {
                             // If `region` is a `ReLateParam` that is captured by the
diff --git a/compiler/rustc_ty_utils/src/ty.rs b/compiler/rustc_ty_utils/src/ty.rs
index 61f2262dfe8..774f0660258 100644
--- a/compiler/rustc_ty_utils/src/ty.rs
+++ b/compiler/rustc_ty_utils/src/ty.rs
@@ -5,6 +5,7 @@ use rustc_hir::def::DefKind;
 use rustc_index::bit_set::BitSet;
 use rustc_middle::bug;
 use rustc_middle::query::Providers;
+use rustc_middle::ty::fold::fold_regions;
 use rustc_middle::ty::{
     self, EarlyBinder, Ty, TyCtxt, TypeSuperVisitable, TypeVisitable, TypeVisitor, Upcast,
 };
@@ -197,7 +198,7 @@ impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for ImplTraitInTraitFinder<'_, 'tcx> {
             // We have entered some binders as we've walked into the
             // bounds of the RPITIT. Shift these binders back out when
             // constructing the top-level projection predicate.
-            let shifted_alias_ty = self.tcx.fold_regions(unshifted_alias_ty, |re, depth| {
+            let shifted_alias_ty = fold_regions(self.tcx, unshifted_alias_ty, |re, depth| {
                 if let ty::ReBound(index, bv) = re.kind() {
                     if depth != ty::INNERMOST {
                         return ty::Region::new_error_with_message(