Some more refactoring.

Change the key of UpvarListMap from DefId to ast::NodeId

src/librustc/ty/mod.rs

@@ -589,8 +589,6 @@ impl<'a, 'gcx> HashStable<StableHashingContext<'a>> for ty::TyS<'gcx> {
 
 pub type Ty<'tcx> = &'tcx TyS<'tcx>;
 
-pub type UpvarListMap<'tcx> = FxHashMap<DefId, Vec<UpvarId>>;
-
 impl<'tcx> serialize::UseSpecializedEncodable for Ty<'tcx> {}
 impl<'tcx> serialize::UseSpecializedDecodable for Ty<'tcx> {}
 
@@ -810,6 +808,7 @@ pub struct UpvarBorrow<'tcx> {
     pub region: ty::Region<'tcx>,
 }
 
+pub type UpvarListMap<'tcx> = FxHashMap<ast::NodeId, Vec<UpvarId>>;
 pub type UpvarCaptureMap<'tcx> = FxHashMap<UpvarId, UpvarCapture<'tcx>>;
 
 #[derive(Copy, Clone)]

src/librustc_mir/build/mod.rs

@@ -642,6 +642,7 @@ fn construct_fn<'a, 'gcx, 'tcx, A>(hir: Cx<'a, 'gcx, 'tcx>,
     let tcx = hir.tcx();
     let span = tcx.hir().span(fn_id);
 
+    // hir.tables().upvar_list[fn_id].
     // Gather the upvars of a closure, if any.
     let upvar_decls: Vec<_> = tcx.with_freevars(fn_id, |freevars| {
         freevars.iter().map(|fv| {

src/librustc_typeck/check/upvar.rs

@@ -159,7 +159,7 @@ impl<'a, 'gcx, 'tcx> FnCtxt<'a, 'gcx, 'tcx> {
             self.tables
                 .borrow_mut()
                 .upvar_list
-                .insert(closure_def_id, freevar_list);
+                .insert(closure_node_id, freevar_list);
         });
 
         let body_owner_def_id = self.tcx.hir().body_owner_def_id(body.id());