1 files changed, 4 insertions, 15 deletions
diff --git a/compiler/rustc_traits/src/codegen.rs b/compiler/rustc_traits/src/codegen.rs
index ddba03b0b..2cd1c3b50 100644
--- a/compiler/rustc_traits/src/codegen.rs
+++ b/compiler/rustc_traits/src/codegen.rs
@@ -5,7 +5,7 @@
 
 use rustc_infer::infer::TyCtxtInferExt;
 use rustc_infer::traits::{FulfillmentErrorCode, TraitEngineExt as _};
-use rustc_middle::traits::{CodegenObligationError, DefiningAnchor};
+use rustc_middle::traits::CodegenObligationError;
 use rustc_middle::ty::{self, TyCtxt};
 use rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt;
 use rustc_trait_selection::traits::{
@@ -22,20 +22,14 @@ use rustc_trait_selection::traits::{
 /// This also expects that `trait_ref` is fully normalized.
 pub fn codegen_select_candidate<'tcx>(
     tcx: TyCtxt<'tcx>,
-    (param_env, trait_ref): (ty::ParamEnv<'tcx>, ty::PolyTraitRef<'tcx>),
+    (param_env, trait_ref): (ty::ParamEnv<'tcx>, ty::TraitRef<'tcx>),
 ) -> Result<&'tcx ImplSource<'tcx, ()>, CodegenObligationError> {
     // We expect the input to be fully normalized.
     debug_assert_eq!(trait_ref, tcx.normalize_erasing_regions(param_env, trait_ref));
 
     // Do the initial selection for the obligation. This yields the
     // shallow result we are looking for -- that is, what specific impl.
-    let infcx = tcx
-        .infer_ctxt()
-        .ignoring_regions()
-        .with_opaque_type_inference(DefiningAnchor::Bubble)
-        .build();
-    //~^ HACK `Bubble` is required for
-    // this test to pass: type-alias-impl-trait/assoc-projection-ice.rs
+    let infcx = tcx.infer_ctxt().ignoring_regions().build();
     let mut selcx = SelectionContext::new(&infcx);
 
     let obligation_cause = ObligationCause::dummy();
@@ -55,7 +49,7 @@ pub fn codegen_select_candidate<'tcx>(
     // Currently, we use a fulfillment context to completely resolve
     // all nested obligations. This is because they can inform the
     // inference of the impl's type parameters.
-    let mut fulfill_cx = <dyn TraitEngine<'tcx>>::new(tcx);
+    let mut fulfill_cx = <dyn TraitEngine<'tcx>>::new(&infcx);
     let impl_source = selection.map(|predicate| {
         fulfill_cx.register_predicate_obligation(&infcx, predicate);
     });
@@ -79,10 +73,5 @@ pub fn codegen_select_candidate<'tcx>(
     let impl_source = infcx.resolve_vars_if_possible(impl_source);
     let impl_source = infcx.tcx.erase_regions(impl_source);
 
-    // Opaque types may have gotten their hidden types constrained, but we can ignore them safely
-    // as they will get constrained elsewhere, too.
-    // (ouz-a) This is required for `type-alias-impl-trait/assoc-projection-ice.rs` to pass
-    let _ = infcx.take_opaque_types();
-
     Ok(&*tcx.arena.alloc(impl_source))
 }