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-rw-r--r--compiler/rustc_trait_selection/src/solve/eval_ctxt/canonical.rs2
-rw-r--r--compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs14
-rw-r--r--compiler/rustc_trait_selection/src/solve/inspect/analyse.rs2
-rw-r--r--compiler/rustc_trait_selection/src/solve/mod.rs5
-rw-r--r--compiler/rustc_trait_selection/src/solve/normalize.rs9
-rw-r--r--compiler/rustc_trait_selection/src/solve/normalizes_to/anon_const.rs4
-rw-r--r--compiler/rustc_trait_selection/src/solve/normalizes_to/mod.rs9
-rw-r--r--compiler/rustc_trait_selection/src/traits/auto_trait.rs3
-rw-r--r--compiler/rustc_trait_selection/src/traits/coherence.rs1
-rw-r--r--compiler/rustc_trait_selection/src/traits/const_evaluatable.rs4
-rw-r--r--compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs3
-rw-r--r--compiler/rustc_trait_selection/src/traits/fulfill.rs4
-rw-r--r--compiler/rustc_trait_selection/src/traits/mod.rs2
-rw-r--r--compiler/rustc_trait_selection/src/traits/project.rs20
-rw-r--r--compiler/rustc_trait_selection/src/traits/select/confirmation.rs3
-rw-r--r--compiler/rustc_trait_selection/src/traits/select/mod.rs5
-rw-r--r--compiler/rustc_trait_selection/src/traits/util.rs4
17 files changed, 35 insertions, 59 deletions
diff --git a/compiler/rustc_trait_selection/src/solve/eval_ctxt/canonical.rs b/compiler/rustc_trait_selection/src/solve/eval_ctxt/canonical.rs
index 690c1797f23..0e0b9e98339 100644
--- a/compiler/rustc_trait_selection/src/solve/eval_ctxt/canonical.rs
+++ b/compiler/rustc_trait_selection/src/solve/eval_ctxt/canonical.rs
@@ -444,7 +444,7 @@ pub(in crate::solve) fn instantiate_canonical_state<'tcx, T: TypeFoldable<TyCtxt
                 infcx.next_region_var(RegionVariableOrigin::MiscVariable(span)).into()
             }
             ty::GenericArgKind::Type(_) => infcx.next_ty_var(span).into(),
-            ty::GenericArgKind::Const(ct) => infcx.next_const_var(ct.ty(), span).into(),
+            ty::GenericArgKind::Const(_) => infcx.next_const_var(span).into(),
         };
 
         orig_values.push(unconstrained);
diff --git a/compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs b/compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs
index f18f1f4f8f0..eecceaec6a7 100644
--- a/compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs
+++ b/compiler/rustc_trait_selection/src/solve/eval_ctxt/mod.rs
@@ -609,8 +609,8 @@ impl<'tcx> EvalCtxt<'_, InferCtxt<'tcx>> {
         ty
     }
 
-    pub(super) fn next_const_infer(&mut self, ty: Ty<'tcx>) -> ty::Const<'tcx> {
-        let ct = self.infcx.next_const_var(ty, DUMMY_SP);
+    pub(super) fn next_const_infer(&mut self) -> ty::Const<'tcx> {
+        let ct = self.infcx.next_const_var(DUMMY_SP);
         self.inspect.add_var_value(ct);
         ct
     }
@@ -620,7 +620,7 @@ impl<'tcx> EvalCtxt<'_, InferCtxt<'tcx>> {
     pub(super) fn next_term_infer_of_kind(&mut self, kind: ty::Term<'tcx>) -> ty::Term<'tcx> {
         match kind.unpack() {
             ty::TermKind::Ty(_) => self.next_ty_infer().into(),
-            ty::TermKind::Const(ct) => self.next_const_infer(ct.ty()).into(),
+            ty::TermKind::Const(_) => self.next_const_infer().into(),
         }
     }
 
@@ -1037,14 +1037,14 @@ impl<'tcx> EvalCtxt<'_, InferCtxt<'tcx>> {
         &self,
         param_env: ty::ParamEnv<'tcx>,
         unevaluated: ty::UnevaluatedConst<'tcx>,
-        ty: Ty<'tcx>,
     ) -> Option<ty::Const<'tcx>> {
         use rustc_middle::mir::interpret::ErrorHandled;
         match self.infcx.const_eval_resolve(param_env, unevaluated, DUMMY_SP) {
-            Ok(Some(val)) => Some(ty::Const::new_value(self.interner(), val, ty)),
+            // THISPR
+            Ok(Some(val)) => Some(ty::Const::new_value(self.interner(), val, todo!())),
             Ok(None) | Err(ErrorHandled::TooGeneric(_)) => None,
             Err(ErrorHandled::Reported(e, _)) => {
-                Some(ty::Const::new_error(self.interner(), e.into(), ty))
+                Some(ty::Const::new_error(self.interner(), e.into()))
             }
         }
     }
@@ -1124,7 +1124,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for ReplaceAliasWithInfer<'_, '_, 'tcx> {
     fn fold_const(&mut self, ct: ty::Const<'tcx>) -> ty::Const<'tcx> {
         match ct.kind() {
             ty::ConstKind::Unevaluated(..) if !ct.has_escaping_bound_vars() => {
-                let infer_ct = self.ecx.next_const_infer(ct.ty());
+                let infer_ct = self.ecx.next_const_infer();
                 let normalizes_to = ty::PredicateKind::AliasRelate(
                     ct.into(),
                     infer_ct.into(),
diff --git a/compiler/rustc_trait_selection/src/solve/inspect/analyse.rs b/compiler/rustc_trait_selection/src/solve/inspect/analyse.rs
index 1f27978e5a6..19c95dad48c 100644
--- a/compiler/rustc_trait_selection/src/solve/inspect/analyse.rs
+++ b/compiler/rustc_trait_selection/src/solve/inspect/analyse.rs
@@ -208,7 +208,7 @@ impl<'a, 'tcx> InspectCandidate<'a, 'tcx> {
                 Some(ty::PredicateKind::NormalizesTo(ty::NormalizesTo { alias, term })) => {
                     let unconstrained_term = match term.unpack() {
                         ty::TermKind::Ty(_) => infcx.next_ty_var(span).into(),
-                        ty::TermKind::Const(ct) => infcx.next_const_var(ct.ty(), span).into(),
+                        ty::TermKind::Const(_) => infcx.next_const_var(span).into(),
                     };
                     let goal =
                         goal.with(infcx.tcx, ty::NormalizesTo { alias, term: unconstrained_term });
diff --git a/compiler/rustc_trait_selection/src/solve/mod.rs b/compiler/rustc_trait_selection/src/solve/mod.rs
index 68a4831c335..be5b36c5c8a 100644
--- a/compiler/rustc_trait_selection/src/solve/mod.rs
+++ b/compiler/rustc_trait_selection/src/solve/mod.rs
@@ -169,7 +169,7 @@ impl<'a, 'tcx> EvalCtxt<'a, InferCtxt<'tcx>> {
 
                 // FIXME(generic_const_exprs): Implement handling for generic
                 // const expressions here.
-                if let Some(_normalized) = self.try_const_eval_resolve(param_env, uv, ct.ty()) {
+                if let Some(_normalized) = self.try_const_eval_resolve(param_env, uv) {
                     self.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
                 } else {
                     self.evaluate_added_goals_and_make_canonical_response(Certainty::AMBIGUOUS)
@@ -217,7 +217,8 @@ impl<'a, 'tcx> EvalCtxt<'a, InferCtxt<'tcx>> {
                 self.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
             }
             _ => {
-                self.eq(goal.param_env, ct.ty(), ty)?;
+                // THISPR
+                self.eq(goal.param_env, todo!(), ty)?;
                 self.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
             }
         }
diff --git a/compiler/rustc_trait_selection/src/solve/normalize.rs b/compiler/rustc_trait_selection/src/solve/normalize.rs
index c60d1aed415..f42edebfcc4 100644
--- a/compiler/rustc_trait_selection/src/solve/normalize.rs
+++ b/compiler/rustc_trait_selection/src/solve/normalize.rs
@@ -109,7 +109,6 @@ where
 
     fn normalize_unevaluated_const(
         &mut self,
-        ty: Ty<'tcx>,
         uv: ty::UnevaluatedConst<'tcx>,
     ) -> Result<ty::Const<'tcx>, Vec<E>> {
         let infcx = self.at.infcx;
@@ -126,7 +125,7 @@ where
 
         self.depth += 1;
 
-        let new_infer_ct = infcx.next_const_var(ty, self.at.cause.span);
+        let new_infer_ct = infcx.next_const_var(self.at.cause.span);
         let obligation = Obligation::new(
             tcx,
             self.at.cause.clone(),
@@ -143,7 +142,7 @@ where
             let ct = infcx.resolve_vars_if_possible(new_infer_ct);
             ct.try_fold_with(self)?
         } else {
-            ty::Const::new_unevaluated(tcx, uv, ty).try_super_fold_with(self)?
+            ty::Const::new_unevaluated(tcx, uv).try_super_fold_with(self)?
         };
 
         self.depth -= 1;
@@ -214,7 +213,7 @@ where
         if uv.has_escaping_bound_vars() {
             let (uv, mapped_regions, mapped_types, mapped_consts) =
                 BoundVarReplacer::replace_bound_vars(infcx, &mut self.universes, uv);
-            let result = ensure_sufficient_stack(|| self.normalize_unevaluated_const(ct.ty(), uv))?;
+            let result = ensure_sufficient_stack(|| self.normalize_unevaluated_const(uv))?;
             Ok(PlaceholderReplacer::replace_placeholders(
                 infcx,
                 mapped_regions,
@@ -224,7 +223,7 @@ where
                 result,
             ))
         } else {
-            ensure_sufficient_stack(|| self.normalize_unevaluated_const(ct.ty(), uv))
+            ensure_sufficient_stack(|| self.normalize_unevaluated_const(uv))
         }
     }
 }
diff --git a/compiler/rustc_trait_selection/src/solve/normalizes_to/anon_const.rs b/compiler/rustc_trait_selection/src/solve/normalizes_to/anon_const.rs
index 362c4072278..a6e4b6ff4a8 100644
--- a/compiler/rustc_trait_selection/src/solve/normalizes_to/anon_const.rs
+++ b/compiler/rustc_trait_selection/src/solve/normalizes_to/anon_const.rs
@@ -12,10 +12,6 @@ impl<'tcx> EvalCtxt<'_, InferCtxt<'tcx>> {
         if let Some(normalized_const) = self.try_const_eval_resolve(
             goal.param_env,
             ty::UnevaluatedConst::new(goal.predicate.alias.def_id, goal.predicate.alias.args),
-            self.interner()
-                .type_of(goal.predicate.alias.def_id)
-                .no_bound_vars()
-                .expect("const ty should not rely on other generics"),
         ) {
             self.instantiate_normalizes_to_term(goal, normalized_const.into());
             self.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
diff --git a/compiler/rustc_trait_selection/src/solve/normalizes_to/mod.rs b/compiler/rustc_trait_selection/src/solve/normalizes_to/mod.rs
index 8c63bd824bc..787f08a084e 100644
--- a/compiler/rustc_trait_selection/src/solve/normalizes_to/mod.rs
+++ b/compiler/rustc_trait_selection/src/solve/normalizes_to/mod.rs
@@ -201,13 +201,7 @@ impl<'tcx> assembly::GoalKind<'tcx> for NormalizesTo<'tcx> {
             let error_response = |ecx: &mut EvalCtxt<'_, InferCtxt<'tcx>>, reason| {
                 let guar = tcx.dcx().span_delayed_bug(tcx.def_span(assoc_def.item.def_id), reason);
                 let error_term = match assoc_def.item.kind {
-                    ty::AssocKind::Const => ty::Const::new_error(
-                        tcx,
-                        guar,
-                        tcx.type_of(goal.predicate.def_id())
-                            .instantiate(tcx, goal.predicate.alias.args),
-                    )
-                    .into(),
+                    ty::AssocKind::Const => ty::Const::new_error(tcx, guar).into(),
                     ty::AssocKind::Type => Ty::new_error(tcx, guar).into(),
                     // This makes no sense...
                     ty::AssocKind::Fn => span_bug!(
@@ -253,7 +247,6 @@ impl<'tcx> assembly::GoalKind<'tcx> for NormalizesTo<'tcx> {
                         ty::EarlyBinder::bind(
                             ty::Const::new_error_with_message(
                                 tcx,
-                                tcx.type_of(assoc_def.item.def_id).instantiate_identity(),
                                 DUMMY_SP,
                                 "associated const projection is not supported yet",
                             )
diff --git a/compiler/rustc_trait_selection/src/traits/auto_trait.rs b/compiler/rustc_trait_selection/src/traits/auto_trait.rs
index 6623a86e69f..c3a25a50c7f 100644
--- a/compiler/rustc_trait_selection/src/traits/auto_trait.rs
+++ b/compiler/rustc_trait_selection/src/traits/auto_trait.rs
@@ -765,7 +765,8 @@ impl<'tcx> AutoTraitFinder<'tcx> {
                                 unevaluated,
                                 obligation.cause.span,
                             ) {
-                                Ok(Some(valtree)) => Ok(ty::Const::new_value(selcx.tcx(),valtree, c.ty())),
+                                // THISPR
+                                Ok(Some(valtree)) => Ok(ty::Const::new_value(selcx.tcx(),valtree, todo!())),
                                 Ok(None) => {
                                     let tcx = self.tcx;
                                     let reported =
diff --git a/compiler/rustc_trait_selection/src/traits/coherence.rs b/compiler/rustc_trait_selection/src/traits/coherence.rs
index 7723f2229bf..7120a061e5b 100644
--- a/compiler/rustc_trait_selection/src/traits/coherence.rs
+++ b/compiler/rustc_trait_selection/src/traits/coherence.rs
@@ -529,7 +529,6 @@ fn plug_infer_with_placeholders<'tcx>(
                         ty::Const::new_placeholder(
                             self.infcx.tcx,
                             ty::Placeholder { universe: self.universe, bound: self.next_var() },
-                            ct.ty(),
                         ),
                     )
                 else {
diff --git a/compiler/rustc_trait_selection/src/traits/const_evaluatable.rs b/compiler/rustc_trait_selection/src/traits/const_evaluatable.rs
index 8348482386f..7d9771af5af 100644
--- a/compiler/rustc_trait_selection/src/traits/const_evaluatable.rs
+++ b/compiler/rustc_trait_selection/src/traits/const_evaluatable.rs
@@ -173,8 +173,7 @@ fn satisfied_from_param_env<'tcx>(
             debug!("is_const_evaluatable: candidate={:?}", c);
             if self.infcx.probe(|_| {
                 let ocx = ObligationCtxt::new(self.infcx);
-                ocx.eq(&ObligationCause::dummy(), self.param_env, c.ty(), self.ct.ty()).is_ok()
-                    && ocx.eq(&ObligationCause::dummy(), self.param_env, c, self.ct).is_ok()
+                ocx.eq(&ObligationCause::dummy(), self.param_env, c, self.ct).is_ok()
                     && ocx.select_all_or_error().is_empty()
             }) {
                 self.single_match = match self.single_match {
@@ -215,7 +214,6 @@ fn satisfied_from_param_env<'tcx>(
 
     if let Some(Ok(c)) = single_match {
         let ocx = ObligationCtxt::new(infcx);
-        assert!(ocx.eq(&ObligationCause::dummy(), param_env, c.ty(), ct.ty()).is_ok());
         assert!(ocx.eq(&ObligationCause::dummy(), param_env, c, ct).is_ok());
         assert!(ocx.select_all_or_error().is_empty());
         return true;
diff --git a/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs b/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs
index 9a0929baeaf..416b62226cd 100644
--- a/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs
+++ b/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs
@@ -920,7 +920,8 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
                             &obligation.cause,
                             None,
                             None,
-                            TypeError::Sorts(ty::error::ExpectedFound::new(true, ty, ct.ty())),
+                            // THISPR
+                            TypeError::Sorts(ty::error::ExpectedFound::new(true, ty, todo!())),
                             false,
                             false,
                         );
diff --git a/compiler/rustc_trait_selection/src/traits/fulfill.rs b/compiler/rustc_trait_selection/src/traits/fulfill.rs
index a26288efc96..277b52e274b 100644
--- a/compiler/rustc_trait_selection/src/traits/fulfill.rs
+++ b/compiler/rustc_trait_selection/src/traits/fulfill.rs
@@ -459,7 +459,8 @@ impl<'a, 'tcx> ObligationProcessor for FulfillProcessor<'a, 'tcx> {
                             match self.selcx.infcx.at(&obligation.cause, obligation.param_env).eq(
                                 // Only really excercised by generic_const_exprs
                                 DefineOpaqueTypes::Yes,
-                                ct.ty(),
+                                // THISPR
+                                todo!(),
                                 ty,
                             ) {
                                 Ok(inf_ok) => {
@@ -633,7 +634,6 @@ impl<'a, 'tcx> ObligationProcessor for FulfillProcessor<'a, 'tcx> {
                             match self.selcx.infcx.try_const_eval_resolve(
                                 obligation.param_env,
                                 unevaluated,
-                                c.ty(),
                                 obligation.cause.span,
                             ) {
                                 Ok(val) => Ok(val),
diff --git a/compiler/rustc_trait_selection/src/traits/mod.rs b/compiler/rustc_trait_selection/src/traits/mod.rs
index d918945dbed..7be2c4a85c5 100644
--- a/compiler/rustc_trait_selection/src/traits/mod.rs
+++ b/compiler/rustc_trait_selection/src/traits/mod.rs
@@ -359,7 +359,7 @@ pub fn normalize_param_env_or_error<'tcx>(
                     // `ty::Const::normalize` can only work with properly preserved binders.
 
                     if c.has_escaping_bound_vars() {
-                        return ty::Const::new_misc_error(self.0, c.ty());
+                        return ty::Const::new_misc_error(self.0);
                     }
                     // While it is pretty sus to be evaluating things with an empty param env, it
                     // should actually be okay since without `feature(generic_const_exprs)` the only
diff --git a/compiler/rustc_trait_selection/src/traits/project.rs b/compiler/rustc_trait_selection/src/traits/project.rs
index 501d9c9266e..2c9cb79664b 100644
--- a/compiler/rustc_trait_selection/src/traits/project.rs
+++ b/compiler/rustc_trait_selection/src/traits/project.rs
@@ -523,16 +523,9 @@ fn normalize_to_error<'a, 'tcx>(
         | ty::AliasTermKind::InherentTy
         | ty::AliasTermKind::OpaqueTy
         | ty::AliasTermKind::WeakTy => selcx.infcx.next_ty_var(cause.span).into(),
-        ty::AliasTermKind::UnevaluatedConst | ty::AliasTermKind::ProjectionConst => selcx
-            .infcx
-            .next_const_var(
-                selcx
-                    .tcx()
-                    .type_of(projection_term.def_id)
-                    .instantiate(selcx.tcx(), projection_term.args),
-                cause.span,
-            )
-            .into(),
+        ty::AliasTermKind::UnevaluatedConst | ty::AliasTermKind::ProjectionConst => {
+            selcx.infcx.next_const_var(cause.span).into()
+        }
     };
     let trait_obligation = Obligation {
         cause,
@@ -744,8 +737,6 @@ fn project<'cx, 'tcx>(
                         obligation.predicate.def_id,
                         obligation.predicate.args,
                     ),
-                    tcx.type_of(obligation.predicate.def_id)
-                        .instantiate(tcx, obligation.predicate.args),
                 )
                 .into(),
                 kind => {
@@ -2071,15 +2062,14 @@ fn confirm_impl_candidate<'cx, 'tcx>(
     // * `args` ends up as `[u32, S]`
     let args = obligation.predicate.args.rebase_onto(tcx, trait_def_id, args);
     let args = translate_args(selcx.infcx, param_env, impl_def_id, args, assoc_ty.defining_node);
-    let ty = tcx.type_of(assoc_ty.item.def_id);
     let is_const = matches!(tcx.def_kind(assoc_ty.item.def_id), DefKind::AssocConst);
     let term: ty::EarlyBinder<'tcx, ty::Term<'tcx>> = if is_const {
         let did = assoc_ty.item.def_id;
         let identity_args = crate::traits::GenericArgs::identity_for_item(tcx, did);
         let uv = ty::UnevaluatedConst::new(did, identity_args);
-        ty.map_bound(|ty| ty::Const::new_unevaluated(tcx, uv, ty).into())
+        ty::EarlyBinder::bind(ty::Const::new_unevaluated(tcx, uv).into())
     } else {
-        ty.map_bound(|ty| ty.into())
+        tcx.type_of(assoc_ty.item.def_id).map_bound(|ty| ty.into())
     };
     if !tcx.check_args_compatible(assoc_ty.item.def_id, args) {
         let err = Ty::new_error_with_message(
diff --git a/compiler/rustc_trait_selection/src/traits/select/confirmation.rs b/compiler/rustc_trait_selection/src/traits/select/confirmation.rs
index ef0d8735d35..749081006f3 100644
--- a/compiler/rustc_trait_selection/src/traits/select/confirmation.rs
+++ b/compiler/rustc_trait_selection/src/traits/select/confirmation.rs
@@ -665,9 +665,6 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
                                 tcx,
                                 ty::INNERMOST,
                                 ty::BoundVar::from_usize(bound_vars.len() - 1),
-                                tcx.type_of(param.def_id)
-                                    .no_bound_vars()
-                                    .expect("const parameter types cannot be generic"),
                             )
                             .into()
                         }
diff --git a/compiler/rustc_trait_selection/src/traits/select/mod.rs b/compiler/rustc_trait_selection/src/traits/select/mod.rs
index 2489b8916d1..93e6cbdf69a 100644
--- a/compiler/rustc_trait_selection/src/traits/select/mod.rs
+++ b/compiler/rustc_trait_selection/src/traits/select/mod.rs
@@ -947,7 +947,6 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
                             match self.infcx.try_const_eval_resolve(
                                 obligation.param_env,
                                 unevaluated,
-                                c.ty(),
                                 obligation.cause.span,
                             ) {
                                 Ok(val) => Ok(val),
@@ -1009,7 +1008,9 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
                             return Ok(EvaluatedToAmbig);
                         }
                         ty::ConstKind::Error(_) => return Ok(EvaluatedToOk),
-                        _ => ct.ty(),
+                        // THISPR
+                        _ => todo!(),
+                        // _ => ct.ty(),
                     };
 
                     match self.infcx.at(&obligation.cause, obligation.param_env).eq(
diff --git a/compiler/rustc_trait_selection/src/traits/util.rs b/compiler/rustc_trait_selection/src/traits/util.rs
index 5d5a22e189c..960c27b636e 100644
--- a/compiler/rustc_trait_selection/src/traits/util.rs
+++ b/compiler/rustc_trait_selection/src/traits/util.rs
@@ -483,7 +483,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for BoundVarReplacer<'_, 'tcx> {
                 let universe = self.universe_for(debruijn);
                 let p = ty::PlaceholderConst { universe, bound: bound_const };
                 self.mapped_consts.insert(p, bound_const);
-                ty::Const::new_placeholder(self.infcx.tcx, p, ct.ty())
+                ty::Const::new_placeholder(self.infcx.tcx, p)
             }
             _ => ct.super_fold_with(self),
         }
@@ -626,7 +626,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for PlaceholderReplacer<'_, 'tcx> {
                     let db = ty::DebruijnIndex::from_usize(
                         self.universe_indices.len() - index + self.current_index.as_usize() - 1,
                     );
-                    ty::Const::new_bound(self.infcx.tcx, db, *replace_var, ct.ty())
+                    ty::Const::new_bound(self.infcx.tcx, db, *replace_var)
                 }
                 None => {
                     if ct.has_infer() {