5 files changed, 21 insertions, 8 deletions
diff --git a/compiler/rustc_infer/src/infer/relate/combine.rs b/compiler/rustc_infer/src/infer/relate/combine.rs
index 18727335006..269607bfa7f 100644
--- a/compiler/rustc_infer/src/infer/relate/combine.rs
+++ b/compiler/rustc_infer/src/infer/relate/combine.rs
@@ -337,7 +337,10 @@ impl<'infcx, 'tcx> CombineFields<'infcx, 'tcx> {
         self.obligations.extend(obligations);
     }
 
-    pub fn register_predicates(&mut self, obligations: impl IntoIterator<Item: Upcast<'tcx>>) {
+    pub fn register_predicates(
+        &mut self,
+        obligations: impl IntoIterator<Item: Upcast<'tcx, ty::Predicate<'tcx>>>,
+    ) {
         self.obligations.extend(obligations.into_iter().map(|to_pred| {
             Obligation::new(self.infcx.tcx, self.trace.cause.clone(), self.param_env, to_pred)
         }))
@@ -360,7 +363,10 @@ pub trait ObligationEmittingRelation<'tcx>: TypeRelation<'tcx> {
     /// Register predicates that must hold in order for this relation to hold. Uses
     /// a default obligation cause, [`ObligationEmittingRelation::register_obligations`] should
     /// be used if control over the obligation causes is required.
-    fn register_predicates(&mut self, obligations: impl IntoIterator<Item: Upcast<'tcx>>);
+    fn register_predicates(
+        &mut self,
+        obligations: impl IntoIterator<Item: Upcast<'tcx, ty::Predicate<'tcx>>>,
+    );
 
     /// Register `AliasRelate` obligation(s) that both types must be related to each other.
     fn register_type_relate_obligation(&mut self, a: Ty<'tcx>, b: Ty<'tcx>);
diff --git a/compiler/rustc_infer/src/infer/relate/glb.rs b/compiler/rustc_infer/src/infer/relate/glb.rs
index 1a8f02fc5ca..03573f665a2 100644
--- a/compiler/rustc_infer/src/infer/relate/glb.rs
+++ b/compiler/rustc_infer/src/infer/relate/glb.rs
@@ -140,7 +140,10 @@ impl<'tcx> ObligationEmittingRelation<'tcx> for Glb<'_, '_, 'tcx> {
         self.fields.param_env
     }
 
-    fn register_predicates(&mut self, obligations: impl IntoIterator<Item: ty::Upcast<'tcx>>) {
+    fn register_predicates(
+        &mut self,
+        obligations: impl IntoIterator<Item: ty::Upcast<'tcx, ty::Predicate<'tcx>>>,
+    ) {
         self.fields.register_predicates(obligations);
     }
 
diff --git a/compiler/rustc_infer/src/infer/relate/lub.rs b/compiler/rustc_infer/src/infer/relate/lub.rs
index 18f92ca5236..72570217bc9 100644
--- a/compiler/rustc_infer/src/infer/relate/lub.rs
+++ b/compiler/rustc_infer/src/infer/relate/lub.rs
@@ -140,7 +140,10 @@ impl<'tcx> ObligationEmittingRelation<'tcx> for Lub<'_, '_, 'tcx> {
         self.fields.param_env
     }
 
-    fn register_predicates(&mut self, obligations: impl IntoIterator<Item: ty::Upcast<'tcx>>) {
+    fn register_predicates(
+        &mut self,
+        obligations: impl IntoIterator<Item: ty::Upcast<'tcx, ty::Predicate<'tcx>>>,
+    ) {
         self.fields.register_predicates(obligations);
     }
 
diff --git a/compiler/rustc_infer/src/infer/relate/type_relating.rs b/compiler/rustc_infer/src/infer/relate/type_relating.rs
index 2dd37022319..3a3c73b44cb 100644
--- a/compiler/rustc_infer/src/infer/relate/type_relating.rs
+++ b/compiler/rustc_infer/src/infer/relate/type_relating.rs
@@ -312,7 +312,10 @@ impl<'tcx> ObligationEmittingRelation<'tcx> for TypeRelating<'_, '_, 'tcx> {
         self.structurally_relate_aliases
     }
 
-    fn register_predicates(&mut self, obligations: impl IntoIterator<Item: ty::Upcast<'tcx>>) {
+    fn register_predicates(
+        &mut self,
+        obligations: impl IntoIterator<Item: ty::Upcast<'tcx, ty::Predicate<'tcx>>>,
+    ) {
         self.fields.register_predicates(obligations);
     }
 
diff --git a/compiler/rustc_infer/src/traits/util.rs b/compiler/rustc_infer/src/traits/util.rs
index 6de32dd0774..57b85a24a74 100644
--- a/compiler/rustc_infer/src/traits/util.rs
+++ b/compiler/rustc_infer/src/traits/util.rs
@@ -357,9 +357,7 @@ impl<'tcx, O: Elaboratable<'tcx>> Elaborator<'tcx, O> {
                                 None
                             }
                         })
-                        .map(|clause| {
-                            elaboratable.child(bound_clause.rebind(clause).upcast(tcx))
-                        }),
+                        .map(|clause| elaboratable.child(bound_clause.rebind(clause).upcast(tcx))),
                 );
             }
             ty::ClauseKind::RegionOutlives(..) => {