4 files changed, 18 insertions, 9 deletions

diff --git a/compiler/rustc_middle/src/middle/exported_symbols.rs b/compiler/rustc_middle/src/middle/exported_symbols.rs
index 631fd09ec..c0c0fd07b 100644
--- a/compiler/rustc_middle/src/middle/exported_symbols.rs
+++ b/compiler/rustc_middle/src/middle/exported_symbols.rs
@@ -43,6 +43,7 @@ pub enum ExportedSymbol<'tcx> {
     NonGeneric(DefId),
     Generic(DefId, SubstsRef<'tcx>),
     DropGlue(Ty<'tcx>),
+    ThreadLocalShim(DefId),
     NoDefId(ty::SymbolName<'tcx>),
 }
 
@@ -58,6 +59,10 @@ impl<'tcx> ExportedSymbol<'tcx> {
             ExportedSymbol::DropGlue(ty) => {
                 tcx.symbol_name(ty::Instance::resolve_drop_in_place(tcx, ty))
             }
+            ExportedSymbol::ThreadLocalShim(def_id) => tcx.symbol_name(ty::Instance {
+                def: ty::InstanceDef::ThreadLocalShim(def_id),
+                substs: ty::InternalSubsts::empty(),
+            }),
             ExportedSymbol::NoDefId(symbol_name) => symbol_name,
         }
     }
diff --git a/compiler/rustc_middle/src/middle/mod.rs b/compiler/rustc_middle/src/middle/mod.rs
index 0b6774f1b..9c25f3009 100644
--- a/compiler/rustc_middle/src/middle/mod.rs
+++ b/compiler/rustc_middle/src/middle/mod.rs
@@ -19,7 +19,7 @@ pub mod lib_features {
                 .stable
                 .iter()
                 .map(|(f, (s, _))| (*f, Some(*s)))
-                .chain(self.unstable.iter().map(|(f, _)| (*f, None)))
+                .chain(self.unstable.keys().map(|f| (*f, None)))
                 .collect();
             all_features.sort_unstable_by(|a, b| a.0.as_str().partial_cmp(b.0.as_str()).unwrap());
             all_features
diff --git a/compiler/rustc_middle/src/middle/privacy.rs b/compiler/rustc_middle/src/middle/privacy.rs
index 893bf54b8..967fed687 100644
--- a/compiler/rustc_middle/src/middle/privacy.rs
+++ b/compiler/rustc_middle/src/middle/privacy.rs
@@ -1,12 +1,12 @@
 //! A pass that checks to make sure private fields and methods aren't used
 //! outside their scopes. This pass will also generate a set of exported items
 //! which are available for use externally when compiled as a library.
-use crate::ty::{DefIdTree, TyCtxt, Visibility};
+use crate::ty::{TyCtxt, Visibility};
 use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
 use rustc_macros::HashStable;
 use rustc_query_system::ich::StableHashingContext;
-use rustc_span::def_id::LocalDefId;
+use rustc_span::def_id::{LocalDefId, CRATE_DEF_ID};
 use std::hash::Hash;
 
 /// Represents the levels of effective visibility an item can have.
@@ -107,12 +107,16 @@ impl EffectiveVisibilities {
         })
     }
 
+    pub fn update_root(&mut self) {
+        self.map.insert(CRATE_DEF_ID, EffectiveVisibility::from_vis(Visibility::Public));
+    }
+
     // FIXME: Share code with `fn update`.
     pub fn update_eff_vis(
         &mut self,
         def_id: LocalDefId,
         eff_vis: &EffectiveVisibility,
-        tree: impl DefIdTree,
+        tcx: TyCtxt<'_>,
     ) {
         use std::collections::hash_map::Entry;
         match self.map.entry(def_id) {
@@ -122,7 +126,7 @@ impl EffectiveVisibilities {
                     let vis_at_level = eff_vis.at_level(l);
                     let old_vis_at_level = old_eff_vis.at_level_mut(l);
                     if vis_at_level != old_vis_at_level
-                        && vis_at_level.is_at_least(*old_vis_at_level, tree)
+                        && vis_at_level.is_at_least(*old_vis_at_level, tcx)
                     {
                         *old_vis_at_level = *vis_at_level
                     }
@@ -219,7 +223,7 @@ impl<Id: Eq + Hash> EffectiveVisibilities<Id> {
         lazy_private_vis: impl FnOnce() -> Visibility,
         inherited_effective_vis: EffectiveVisibility,
         level: Level,
-        tree: impl DefIdTree,
+        tcx: TyCtxt<'_>,
     ) -> bool {
         let mut changed = false;
         let mut current_effective_vis = self
@@ -240,7 +244,7 @@ impl<Id: Eq + Hash> EffectiveVisibilities<Id> {
                     && level != l)
                 {
                     calculated_effective_vis =
-                        if nominal_vis.is_at_least(inherited_effective_vis_at_level, tree) {
+                        if nominal_vis.is_at_least(inherited_effective_vis_at_level, tcx) {
                             inherited_effective_vis_at_level
                         } else {
                             nominal_vis
@@ -249,7 +253,7 @@ impl<Id: Eq + Hash> EffectiveVisibilities<Id> {
                 // effective visibility can't be decreased at next update call for the
                 // same id
                 if *current_effective_vis_at_level != calculated_effective_vis
-                    && calculated_effective_vis.is_at_least(*current_effective_vis_at_level, tree)
+                    && calculated_effective_vis.is_at_least(*current_effective_vis_at_level, tcx)
                 {
                     changed = true;
                     *current_effective_vis_at_level = calculated_effective_vis;
diff --git a/compiler/rustc_middle/src/middle/stability.rs b/compiler/rustc_middle/src/middle/stability.rs
index 354c84e22..b61f7806b 100644
--- a/compiler/rustc_middle/src/middle/stability.rs
+++ b/compiler/rustc_middle/src/middle/stability.rs
@@ -3,7 +3,7 @@
 
 pub use self::StabilityLevel::*;
 
-use crate::ty::{self, DefIdTree, TyCtxt};
+use crate::ty::{self, TyCtxt};
 use rustc_ast::NodeId;
 use rustc_attr::{self as attr, ConstStability, DefaultBodyStability, Deprecation, Stability};
 use rustc_data_structures::fx::FxHashMap;