resolve: Remove fn_has_self_parameter_untracked

compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs

@@ -555,10 +555,6 @@ pub fn load_macro_untracked(&self, id: DefId, sess: &Session) -> LoadedMacro {
         )
     }
 
-    pub fn fn_has_self_parameter_untracked(&self, def: DefId, sess: &Session) -> bool {
-        self.get_crate_data(def.krate).get_fn_has_self_parameter(def.index, sess)
-    }
-
     pub fn crate_source_untracked(&self, cnum: CrateNum) -> Lrc<CrateSource> {
         self.get_crate_data(cnum).source.clone()
     }

compiler/rustc_resolve/src/build_reduced_graph.rs

@@ -1008,11 +1008,6 @@ fn build_reduced_graph_for_external_crate_res(&mut self, child: ModChild) {
         match res {
             Res::Def(DefKind::Struct, def_id) => self.insert_field_names_extern(def_id),
             Res::Def(DefKind::Union, def_id) => self.insert_field_names_extern(def_id),
-            Res::Def(DefKind::AssocFn, def_id) => {
-                if self.r.cstore().fn_has_self_parameter_untracked(def_id, self.r.tcx.sess) {
-                    self.r.has_self.insert(def_id);
-                }
-            }
             _ => {}
         }
     }
@@ -1411,7 +1406,7 @@ fn visit_assoc_item(&mut self, item: &'b AssocItem, ctxt: AssocCtxt) {
                 AssocItemKind::Const(..) => (DefKind::AssocConst, ValueNS),
                 AssocItemKind::Fn(box Fn { ref sig, .. }) => {
                     if sig.decl.has_self() {
-                        self.r.has_self.insert(def_id);
+                        self.r.has_self.insert(local_def_id);
                     }
                     (DefKind::AssocFn, ValueNS)
                 }

compiler/rustc_resolve/src/late/diagnostics.rs

@@ -1649,7 +1649,17 @@ fn extract_node_id(t: &Ty) -> Option<NodeId> {
             ) {
                 let res = binding.res();
                 if filter_fn(res) {
-                    if self.r.has_self.contains(&res.def_id()) {
+                    let def_id = res.def_id();
+                    let has_self = match def_id.as_local() {
+                        Some(def_id) => self.r.has_self.contains(&def_id),
+                        None => self
+                            .r
+                            .tcx
+                            .fn_arg_names(def_id)
+                            .first()
+                            .map_or(false, |ident| ident.name == kw::SelfLower),
+                    };
+                    if has_self {
                         return Some(AssocSuggestion::MethodWithSelf { called });
                     } else {
                         match res {

compiler/rustc_resolve/src/lib.rs

@@ -35,7 +35,7 @@
 use rustc_expand::base::{DeriveResolutions, SyntaxExtension, SyntaxExtensionKind};
 use rustc_hir::def::Namespace::{self, *};
 use rustc_hir::def::{self, CtorOf, DefKind, DocLinkResMap, LifetimeRes, PartialRes, PerNS};
-use rustc_hir::def_id::{CrateNum, DefId, LocalDefId, LocalDefIdMap};
+use rustc_hir::def_id::{CrateNum, DefId, LocalDefId, LocalDefIdMap, LocalDefIdSet};
 use rustc_hir::def_id::{CRATE_DEF_ID, LOCAL_CRATE};
 use rustc_hir::definitions::DefPathData;
 use rustc_hir::TraitCandidate;
@@ -881,7 +881,7 @@ pub struct Resolver<'a, 'tcx> {
     extern_prelude: FxHashMap<Ident, ExternPreludeEntry<'a>>,
 
     /// N.B., this is used only for better diagnostics, not name resolution itself.
-    has_self: FxHashSet<DefId>,
+    has_self: LocalDefIdSet,
 
     /// Names of fields of an item `DefId` accessible with dot syntax.
     /// Used for hints during error reporting.
@@ -1249,7 +1249,7 @@ pub fn new(
             prelude: None,
             extern_prelude,
 
-            has_self: FxHashSet::default(),
+            has_self: Default::default(),
             field_names: FxHashMap::default(),
             field_visibility_spans: FxHashMap::default(),