Rollup merge of #92248 - compiler-errors:normalize-type-for-pointee, r=jackh726

[rust.git] / compiler / rustc_trait_selection / src / traits / project.rs

diff --git a/compiler/rustc_trait_selection/src/traits/project.rs b/compiler/rustc_trait_selection/src/traits/project.rs
index bcb7e2100ab810131f58db24672a0a6421cc997b..035bc9b00c9305f3545b56b7ae7bfa47edd088eb 100644 (file)
--- a/compiler/rustc_trait_selection/src/traits/project.rs
+++ b/compiler/rustc_trait_selection/src/traits/project.rs
@@ -1909,7 +1909,6 @@ fn assoc_ty_def(
     assoc_ty_def_id: DefId,
 ) -> Result<specialization_graph::LeafDef, ErrorReported> {
     let tcx = selcx.tcx();
-    let assoc_ty_name = tcx.associated_item(assoc_ty_def_id).ident;
     let trait_def_id = tcx.impl_trait_ref(impl_def_id).unwrap().def_id;
     let trait_def = tcx.trait_def(trait_def_id);
 
@@ -1919,21 +1918,18 @@ fn assoc_ty_def(
     // for the associated item at the given impl.
     // If there is no such item in that impl, this function will fail with a
     // cycle error if the specialization graph is currently being built.
-    let impl_node = specialization_graph::Node::Impl(impl_def_id);
-    for item in impl_node.items(tcx) {
-        if matches!(item.kind, ty::AssocKind::Type)
-            && tcx.hygienic_eq(item.ident, assoc_ty_name, trait_def_id)
-        {
-            return Ok(specialization_graph::LeafDef {
-                item: *item,
-                defining_node: impl_node,
-                finalizing_node: if item.defaultness.is_default() { None } else { Some(impl_node) },
-            });
-        }
+    if let Some(&impl_item_id) = tcx.impl_item_implementor_ids(impl_def_id).get(&assoc_ty_def_id) {
+        let item = tcx.associated_item(impl_item_id);
+        let impl_node = specialization_graph::Node::Impl(impl_def_id);
+        return Ok(specialization_graph::LeafDef {
+            item: *item,
+            defining_node: impl_node,
+            finalizing_node: if item.defaultness.is_default() { None } else { Some(impl_node) },
+        });
     }
 
     let ancestors = trait_def.ancestors(tcx, impl_def_id)?;
-    if let Some(assoc_item) = ancestors.leaf_def(tcx, assoc_ty_name, ty::AssocKind::Type) {
+    if let Some(assoc_item) = ancestors.leaf_def(tcx, assoc_ty_def_id) {
         Ok(assoc_item)
     } else {
         // This is saying that neither the trait nor
@@ -1942,7 +1938,11 @@ fn assoc_ty_def(
         // could only arise through a compiler bug --
         // if the user wrote a bad item name, it
         // should have failed in astconv.
-        bug!("No associated type `{}` for {}", assoc_ty_name, tcx.def_path_str(impl_def_id))
+        bug!(
+            "No associated type `{}` for {}",
+            tcx.item_name(assoc_ty_def_id),
+            tcx.def_path_str(impl_def_id)
+        )
     }
 }