Remove useless map.

Author: cjgillot

compiler/rustc_middle/src/middle/stability.rs

@@ -11,7 +11,7 @@ use rustc_errors::{Applicability, Diagnostic};
 use rustc_feature::GateIssue;
 use rustc_hir as hir;
 use rustc_hir::def::DefKind;
-use rustc_hir::def_id::{CrateNum, DefId, LocalDefId, CRATE_DEF_INDEX};
+use rustc_hir::def_id::{DefId, LocalDefId, CRATE_DEF_INDEX};
 use rustc_hir::{self, HirId};
 use rustc_middle::ty::print::with_no_trimmed_paths;
 use rustc_session::lint::builtin::{DEPRECATED, DEPRECATED_IN_FUTURE, SOFT_UNSTABLE};
@@ -63,9 +63,6 @@ pub struct Index {
     pub stab_map: FxHashMap<LocalDefId, Stability>,
     pub const_stab_map: FxHashMap<LocalDefId, ConstStability>,
     pub depr_map: FxHashMap<LocalDefId, DeprecationEntry>,
-
-    /// Maps for each crate whether it is part of the staged API.
-    pub staged_api: FxHashMap<CrateNum, bool>,
 }
 
 impl Index {

compiler/rustc_passes/src/stability.rs

@@ -7,7 +7,7 @@ use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_errors::struct_span_err;
 use rustc_hir as hir;
 use rustc_hir::def::{DefKind, Res};
-use rustc_hir::def_id::{DefId, LocalDefId, CRATE_DEF_ID, CRATE_DEF_INDEX, LOCAL_CRATE};
+use rustc_hir::def_id::{DefId, LocalDefId, CRATE_DEF_ID, CRATE_DEF_INDEX};
 use rustc_hir::hir_id::CRATE_HIR_ID;
 use rustc_hir::intravisit::{self, Visitor};
 use rustc_hir::{FieldDef, Generics, HirId, Item, TraitRef, Ty, TyKind, Variant};
@@ -654,12 +654,7 @@ impl<'tcx> Visitor<'tcx> for MissingStabilityAnnotations<'tcx> {
 }
 
 fn stability_index(tcx: TyCtxt<'_>, (): ()) -> Index {
-    let is_staged_api =
-        tcx.sess.opts.debugging_opts.force_unstable_if_unmarked || tcx.features().staged_api;
-    let mut staged_api = FxHashMap::default();
-    staged_api.insert(LOCAL_CRATE, is_staged_api);
     let mut index = Index {
-        staged_api,
         stab_map: Default::default(),
         const_stab_map: Default::default(),
         depr_map: Default::default(),
@@ -873,9 +868,10 @@ impl<'tcx> Visitor<'tcx> for CheckTraitImplStable<'tcx> {
 /// were expected to be library features), and the list of features used from
 /// libraries, identify activated features that don't exist and error about them.
 pub fn check_unused_or_stable_features(tcx: TyCtxt<'_>) {
-    let access_levels = &tcx.privacy_access_levels(());
-
-    if tcx.stability().staged_api[&LOCAL_CRATE] {
+    let is_staged_api =
+        tcx.sess.opts.debugging_opts.force_unstable_if_unmarked || tcx.features().staged_api;
+    if is_staged_api {
+        let access_levels = &tcx.privacy_access_levels(());
         let mut missing = MissingStabilityAnnotations { tcx, access_levels };
         missing.check_missing_stability(CRATE_DEF_ID, tcx.hir().span(CRATE_HIR_ID));
         tcx.hir().walk_toplevel_module(&mut missing);