Rollup merge of #112546 - lcnr:opaque-type-cleanup, r=compiler-errors

new solver: extend assert to other aliases

Author: matthiaskrgr

compiler/rustc_infer/src/infer/combine.rs

@@ -34,7 +34,7 @@ use rustc_middle::infer::unify_key::{ConstVarValue, ConstVariableValue};
 use rustc_middle::infer::unify_key::{ConstVariableOrigin, ConstVariableOriginKind};
 use rustc_middle::ty::error::{ExpectedFound, TypeError};
 use rustc_middle::ty::relate::{RelateResult, TypeRelation};
-use rustc_middle::ty::{self, AliasKind, InferConst, ToPredicate, Ty, TyCtxt, TypeVisitableExt};
+use rustc_middle::ty::{self, InferConst, ToPredicate, Ty, TyCtxt, TypeVisitableExt};
 use rustc_middle::ty::{IntType, UintType};
 use rustc_span::DUMMY_SP;
 
@@ -103,12 +103,12 @@ impl<'tcx> InferCtxt<'tcx> {
 
             // We don't expect `TyVar` or `Fresh*` vars at this point with lazy norm.
             (
-                ty::Alias(AliasKind::Projection, _),
+                ty::Alias(..),
                 ty::Infer(ty::TyVar(_) | ty::FreshTy(_) | ty::FreshIntTy(_) | ty::FreshFloatTy(_)),
             )
             | (
                 ty::Infer(ty::TyVar(_) | ty::FreshTy(_) | ty::FreshIntTy(_) | ty::FreshFloatTy(_)),
-                ty::Alias(AliasKind::Projection, _),
+                ty::Alias(..),
             ) if self.next_trait_solver() => {
                 bug!()
             }

compiler/rustc_trait_selection/src/solve/assembly/mod.rs

@@ -320,7 +320,7 @@ impl<'tcx> EvalCtxt<'_, 'tcx> {
         candidates
     }
 
-    /// If the self type of a goal is a projection, computing the relevant candidates is difficult.
+    /// If the self type of a goal is an alias, computing the relevant candidates is difficult.
     ///
     /// To deal with this, we first try to normalize the self type and add the candidates for the normalized
     /// self type to the list of candidates in case that succeeds. We also have to consider candidates with the