Some rebinds and dummys

3 files changed, 14 insertions, 9 deletions

diff --git a/compiler/rustc_trait_selection/src/traits/auto_trait.rs b/compiler/rustc_trait_selection/src/traits/auto_trait.rs
index b38e3fbaab4..cb66dc7e5d9 100644
--- a/compiler/rustc_trait_selection/src/traits/auto_trait.rs
+++ b/compiler/rustc_trait_selection/src/traits/auto_trait.rs
@@ -82,9 +82,10 @@ impl<'tcx> AutoTraitFinder<'tcx> {
     ) -> AutoTraitResult<A> {
         let tcx = self.tcx;
 
+        debug_assert!(!ty.has_escaping_bound_vars());
         let trait_ref = ty::TraitRef { def_id: trait_did, substs: tcx.mk_substs_trait(ty, &[]) };
 
-        let trait_pred = ty::Binder::bind(trait_ref);
+        let trait_pred = ty::Binder::dummy(trait_ref);
 
         let bail_out = tcx.infer_ctxt().enter(|infcx| {
             let mut selcx = SelectionContext::with_negative(&infcx, true);
@@ -280,7 +281,7 @@ impl AutoTraitFinder<'tcx> {
 
         let mut already_visited = FxHashSet::default();
         let mut predicates = VecDeque::new();
-        predicates.push_back(ty::Binder::bind(ty::TraitPredicate {
+        predicates.push_back(ty::Binder::dummy(ty::TraitPredicate {
             trait_ref: ty::TraitRef {
                 def_id: trait_did,
                 substs: infcx.tcx.mk_substs_trait(ty, &[]),
diff --git a/compiler/rustc_trait_selection/src/traits/object_safety.rs b/compiler/rustc_trait_selection/src/traits/object_safety.rs
index 7de20e477fe..b5a458db607 100644
--- a/compiler/rustc_trait_selection/src/traits/object_safety.rs
+++ b/compiler/rustc_trait_selection/src/traits/object_safety.rs
@@ -757,7 +757,7 @@ fn contains_illegal_self_type_reference<'tcx, T: TypeFoldable<'tcx>>(
     struct IllegalSelfTypeVisitor<'tcx> {
         tcx: TyCtxt<'tcx>,
         trait_def_id: DefId,
-        supertraits: Option<Vec<ty::PolyTraitRef<'tcx>>>,
+        supertraits: Option<Vec<DefId>>,
     }
 
     impl<'tcx> TypeVisitor<'tcx> for IllegalSelfTypeVisitor<'tcx> {
@@ -778,8 +778,10 @@ fn contains_illegal_self_type_reference<'tcx, T: TypeFoldable<'tcx>>(
                     // Compute supertraits of current trait lazily.
                     if self.supertraits.is_none() {
                         let trait_ref =
-                            ty::Binder::bind(ty::TraitRef::identity(self.tcx, self.trait_def_id));
-                        self.supertraits = Some(traits::supertraits(self.tcx, trait_ref).collect());
+                            ty::Binder::dummy(ty::TraitRef::identity(self.tcx, self.trait_def_id));
+                        self.supertraits = Some(
+                            traits::supertraits(self.tcx, trait_ref).map(|t| t.def_id()).collect(),
+                        );
                     }
 
                     // Determine whether the trait reference `Foo as
@@ -790,9 +792,11 @@ fn contains_illegal_self_type_reference<'tcx, T: TypeFoldable<'tcx>>(
                     // direct equality here because all of these types
                     // are part of the formal parameter listing, and
                     // hence there should be no inference variables.
-                    let projection_trait_ref = ty::Binder::bind(data.trait_ref(self.tcx));
-                    let is_supertrait_of_current_trait =
-                        self.supertraits.as_ref().unwrap().contains(&projection_trait_ref);
+                    let is_supertrait_of_current_trait = self
+                        .supertraits
+                        .as_ref()
+                        .unwrap()
+                        .contains(&data.trait_ref(self.tcx).def_id);
 
                     if is_supertrait_of_current_trait {
                         ControlFlow::CONTINUE // do not walk contained types, do not report error, do collect $200
diff --git a/compiler/rustc_trait_selection/src/traits/select/confirmation.rs b/compiler/rustc_trait_selection/src/traits/select/confirmation.rs
index 272930f6bb9..0dc0dd871fe 100644
--- a/compiler/rustc_trait_selection/src/traits/select/confirmation.rs
+++ b/compiler/rustc_trait_selection/src/traits/select/confirmation.rs
@@ -748,7 +748,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
                     cause,
                     obligation.recursion_depth + 1,
                     obligation.param_env,
-                    ty::Binder::bind(outlives).to_predicate(tcx),
+                    obligation.predicate.rebind(outlives).to_predicate(tcx),
                 ));
             }