Merging upstream version 1.67.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 9 insertions, 19 deletions

diff --git a/compiler/rustc_trait_selection/src/traits/relationships.rs b/compiler/rustc_trait_selection/src/traits/relationships.rs
index 8cf500a46..bfa318787 100644
--- a/compiler/rustc_trait_selection/src/traits/relationships.rs
+++ b/compiler/rustc_trait_selection/src/traits/relationships.rs
@@ -1,8 +1,8 @@
 use crate::infer::InferCtxt;
 use crate::traits::query::evaluate_obligation::InferCtxtExt;
-use crate::traits::{ObligationCause, PredicateObligation};
+use crate::traits::PredicateObligation;
 use rustc_infer::traits::TraitEngine;
-use rustc_middle::ty::{self, ToPredicate};
+use rustc_middle::ty;
 
 pub(crate) fn update<'tcx, T>(
     engine: &mut T,
@@ -12,34 +12,22 @@ pub(crate) fn update<'tcx, T>(
     T: TraitEngine<'tcx>,
 {
     // (*) binder skipped
-    if let ty::PredicateKind::Trait(tpred) = obligation.predicate.kind().skip_binder()
+    if let ty::PredicateKind::Clause(ty::Clause::Trait(tpred)) = obligation.predicate.kind().skip_binder()
         && let Some(ty) = infcx.shallow_resolve(tpred.self_ty()).ty_vid().map(|t| infcx.root_var(t))
         && infcx.tcx.lang_items().sized_trait().map_or(false, |st| st != tpred.trait_ref.def_id)
     {
         let new_self_ty = infcx.tcx.types.unit;
 
-        let trait_ref = ty::TraitRef {
-            substs: infcx.tcx.mk_substs_trait(new_self_ty, &tpred.trait_ref.substs[1..]),
-            ..tpred.trait_ref
-        };
-
         // Then construct a new obligation with Self = () added
         // to the ParamEnv, and see if it holds.
-        let o = rustc_infer::traits::Obligation::new(
-            ObligationCause::dummy(),
-            obligation.param_env,
+        let o = obligation.with(infcx.tcx,
             obligation
                 .predicate
                 .kind()
                 .rebind(
                     // (*) binder moved here
-                    ty::PredicateKind::Trait(ty::TraitPredicate {
-                        trait_ref,
-                        constness: tpred.constness,
-                        polarity: tpred.polarity,
-                    })
-                )
-                .to_predicate(infcx.tcx),
+                    ty::PredicateKind::Clause(ty::Clause::Trait(tpred.with_self_type(infcx.tcx, new_self_ty)))
+                ),
         );
         // Don't report overflow errors. Otherwise equivalent to may_hold.
         if let Ok(result) = infcx.probe(|_| infcx.evaluate_obligation(&o)) && result.may_apply() {
@@ -47,7 +35,9 @@ pub(crate) fn update<'tcx, T>(
         }
     }
 
-    if let ty::PredicateKind::Projection(predicate) = obligation.predicate.kind().skip_binder() {
+    if let ty::PredicateKind::Clause(ty::Clause::Projection(predicate)) =
+        obligation.predicate.kind().skip_binder()
+    {
         // If the projection predicate (Foo::Bar == X) has X as a non-TyVid,
         // we need to make it into one.
         if let Some(vid) = predicate.term.ty().and_then(|ty| ty.ty_vid()) {