Rustup to rust-lang/rust#92086

For us this mostly means changing `hir::exports::Export` to
`metadata::ModChild` and `tcx.item_children` to `tcx.module_children`.

rust-toolchain

@@ -1,4 +1,4 @@
 # NOTE: Keep in sync with nightly date on README
 [toolchain]
-channel = "nightly-2021-12-31"
+channel = "nightly-2022-01-10"
 components = ["llvm-tools-preview", "rustc-dev"]

src/mapping.rs

@@ -9,7 +9,7 @@ use rustc_hir::{
     HirId,
 };
 use rustc_middle::{
-    hir::exports::Export,
+    metadata::ModChild,
     ty::{AssocKind, GenericParamDef, GenericParamDefKind},
 };
 use rustc_span::symbol::Symbol;
@@ -325,7 +325,7 @@ impl IdMapping {
 }
 
 /// An export that could be missing from one of the crate versions.
-type OptionalExport = Option<Export>;
+type OptionalExport = Option<ModChild>;
 
 /// A mapping from names to pairs of old and new exports.
 ///
@@ -343,7 +343,7 @@ pub struct NameMapping {
 
 impl NameMapping {
     /// Insert a single export in the appropriate map, at the appropriate position.
-    fn insert(&mut self, item: Export, old: bool) {
+    fn insert(&mut self, item: ModChild, old: bool) {
         use rustc_hir::def::DefKind::*;
         use rustc_hir::def::Res::*;
 
@@ -397,7 +397,7 @@ impl NameMapping {
     }
 
     /// Add all items from two vectors of old/new exports.
-    pub fn add(&mut self, old_items: Vec<Export>, new_items: Vec<Export>) {
+    pub fn add(&mut self, old_items: Vec<ModChild>, new_items: Vec<ModChild>) {
         for item in old_items {
             self.insert(item, true);
         }
@@ -408,7 +408,7 @@ impl NameMapping {
     }
 
     /// Drain the item pairs being stored.
-    pub fn drain(&mut self) -> impl Iterator<Item = (Option<Export>, Option<Export>)> + '_ {
+    pub fn drain(&mut self) -> impl Iterator<Item = (Option<ModChild>, Option<ModChild>)> + '_ {
         self.type_map
             .drain()
             .chain(self.value_map.drain())

src/traverse.rs

@@ -23,7 +23,7 @@ use rustc_hir::hir_id::HirId;
 use rustc_hir::lang_items::LangItem;
 use rustc_infer::infer::TyCtxtInferExt;
 use rustc_middle::{
-    hir::exports::Export,
+    metadata::ModChild,
     ty::{
         subst::{InternalSubsts, Subst},
         AssocItem, GenericParamDef, GenericParamDefKind, Generics, TraitRef, Ty, TyCtxt, TyKind,
@@ -67,7 +67,7 @@ pub fn run_analysis(tcx: TyCtxt, old: DefId, new: DefId) -> ChangeSet {
 }
 
 // Get the visibility of the inner item, given the outer item's visibility.
-fn get_vis(outer_vis: Visibility, def: Export) -> Visibility {
+fn get_vis(outer_vis: Visibility, def: ModChild) -> Visibility {
     if outer_vis == Public {
         def.vis
     } else {
@@ -85,7 +85,7 @@ pub fn run_traversal(tcx: TyCtxt, new: DefId) {
 
     // Pull a module from the queue, with its global visibility.
     while let Some((new_def_id, idents, new_vis)) = mod_queue.pop_front() {
-        for item in tcx.item_children(new_def_id).iter().copied() {
+        for item in tcx.module_children(new_def_id).iter().copied() {
             let n_vis = get_vis(new_vis, item);
             match item.res {
                 Def(Mod, n_def_id) => {
@@ -147,8 +147,8 @@ fn diff_structure<'tcx>(
     // Pull a matched module pair from the queue, with the modules' global visibility.
     while let Some((old_def_id, new_def_id, old_vis, new_vis)) = mod_queue.pop_front() {
         children.add(
-            tcx.item_children(old_def_id).to_vec(), // TODO: clean up
-            tcx.item_children(new_def_id).to_vec(),
+            tcx.module_children(old_def_id).to_vec(), // TODO: clean up
+            tcx.module_children(new_def_id).to_vec(),
         );
 
         for items in children.drain() {