rustc_hir: Change representation of import paths to support multiple resolutions

2 files changed, 5 insertions, 3 deletions

diff --git a/compiler/rustc_save_analysis/src/dump_visitor.rs b/compiler/rustc_save_analysis/src/dump_visitor.rs
index fae20c2ba5f..b4528853825 100644
--- a/compiler/rustc_save_analysis/src/dump_visitor.rs
+++ b/compiler/rustc_save_analysis/src/dump_visitor.rs
@@ -185,13 +185,13 @@ impl<'tcx> DumpVisitor<'tcx> {
         }
     }
 
-    fn write_sub_paths(&mut self, path: &'tcx hir::Path<'tcx>) {
+    fn write_sub_paths<R>(&mut self, path: &'tcx hir::Path<'tcx, R>) {
         self.write_segments(path.segments)
     }
 
     // As write_sub_paths, but does not process the last ident in the path (assuming it
     // will be processed elsewhere). See note on write_sub_paths about global.
-    fn write_sub_paths_truncated(&mut self, path: &'tcx hir::Path<'tcx>) {
+    fn write_sub_paths_truncated<R>(&mut self, path: &'tcx hir::Path<'tcx, R>) {
         if let [segments @ .., _] = path.segments {
             self.write_segments(segments)
         }
diff --git a/compiler/rustc_save_analysis/src/lib.rs b/compiler/rustc_save_analysis/src/lib.rs
index 4fa0c14715e..f05eb2b7432 100644
--- a/compiler/rustc_save_analysis/src/lib.rs
+++ b/compiler/rustc_save_analysis/src/lib.rs
@@ -594,7 +594,9 @@ impl<'tcx> SaveContext<'tcx> {
         match self.tcx.hir().get(hir_id) {
             Node::TraitRef(tr) => tr.path.res,
 
-            Node::Item(&hir::Item { kind: hir::ItemKind::Use(path, _), .. }) => path.res,
+            Node::Item(&hir::Item { kind: hir::ItemKind::Use(path, _), .. }) => {
+                path.res.get(0).copied().unwrap_or(Res::Err)
+            }
             Node::PathSegment(seg) => {
                 if seg.res != Res::Err {
                     seg.res