EMPTY_MAP -> EMPTY_SET

Author: jyn514

src/librustdoc/core.rs

@@ -364,9 +364,6 @@ pub fn run_core(options: RustdocOptions) -> (clean::Crate, RenderInfo, RenderOpt
         ..Options::default()
     };
 
-    lazy_static! {
-        static ref EMPTY_MAP: FxHashSet<LocalDefId> = FxHashSet::default();
-    }
     let config = interface::Config {
         opts: sessopts,
         crate_cfg: interface::parse_cfgspecs(cfgs),
@@ -381,12 +378,15 @@ pub fn run_core(options: RustdocOptions) -> (clean::Crate, RenderInfo, RenderOpt
         lint_caps,
         register_lints: None,
         override_queries: Some(|_sess, local_providers, external_providers| {
+            lazy_static! {
+                static ref EMPTY_SET: FxHashSet<LocalDefId> = FxHashSet::default();
+            }
             // Most lints will require typechecking, so just don't run them.
             local_providers.lint_mod = |_, _| {};
             external_providers.lint_mod = |_, _| {};
             local_providers.typeck_item_bodies = |_, _| {};
             // hack so that `used_trait_imports` won't try to call typeck_tables_of
-            local_providers.used_trait_imports = |_, _| &EMPTY_MAP;
+            local_providers.used_trait_imports = |_, _| &EMPTY_SET;
             // In case typeck does end up being called, don't ICE in case there were name resolution errors
             local_providers.typeck_tables_of = move |tcx, def_id| {
                 // Closures' tables come from their outermost function,