3 files changed, 31 insertions, 13 deletions
diff --git a/src/librustc_save_analysis/dump_visitor.rs b/src/librustc_save_analysis/dump_visitor.rs
index edd2db3c8f7..502ae337b52 100644
--- a/src/librustc_save_analysis/dump_visitor.rs
+++ b/src/librustc_save_analysis/dump_visitor.rs
@@ -115,15 +115,17 @@ impl<'l, 'tcx> DumpVisitor<'l, 'tcx> {
         F: FnOnce(&mut Self),
     {
         let item_def_id = self.tcx.hir().local_def_id_from_node_id(item_id);
-        if self.tcx.has_typeck_tables(item_def_id) {
-            let tables = self.tcx.typeck_tables_of(item_def_id);
-            let old_tables = self.save_ctxt.tables;
-            self.save_ctxt.tables = tables;
-            f(self);
-            self.save_ctxt.tables = old_tables;
+
+        let tables = if self.tcx.has_typeck_tables(item_def_id) {
+            self.tcx.typeck_tables_of(item_def_id)
         } else {
-            f(self);
-        }
+            self.save_ctxt.empty_tables
+        };
+
+        let old_tables = self.save_ctxt.tables;
+        self.save_ctxt.tables = tables;
+        f(self);
+        self.save_ctxt.tables = old_tables;
     }
 
     fn span_from_span(&self, span: Span) -> SpanData {
@@ -530,12 +532,14 @@ impl<'l, 'tcx> DumpVisitor<'l, 'tcx> {
             );
         }
 
-        for field in def.fields() {
-            self.process_struct_field_def(field, item.id);
-            self.visit_ty(&field.ty);
-        }
+        self.nest_tables(item.id, |v| {
+            for field in def.fields() {
+                v.process_struct_field_def(field, item.id);
+                v.visit_ty(&field.ty);
+            }
 
-        self.process_generic_params(ty_params, &qualname, item.id);
+            v.process_generic_params(ty_params, &qualname, item.id);
+        });
     }
 
     fn process_enum(
diff --git a/src/librustc_save_analysis/lib.rs b/src/librustc_save_analysis/lib.rs
index 70b508d4786..1cfb84bb511 100644
--- a/src/librustc_save_analysis/lib.rs
+++ b/src/librustc_save_analysis/lib.rs
@@ -48,6 +48,9 @@ use log::{debug, error, info};
 pub struct SaveContext<'l, 'tcx> {
     tcx: TyCtxt<'tcx>,
     tables: &'l ty::TypeckTables<'tcx>,
+    /// Used as a fallback when nesting the typeck tables during item processing
+    /// (if these are not available for that item, e.g. don't own a body)
+    empty_tables: &'l ty::TypeckTables<'tcx>,
     access_levels: &'l AccessLevels,
     span_utils: SpanUtils<'tcx>,
     config: Config,
@@ -1114,6 +1117,7 @@ pub fn process_crate<'l, 'tcx, H: SaveHandler>(
         let save_ctxt = SaveContext {
             tcx,
             tables: &ty::TypeckTables::empty(None),
+            empty_tables: &ty::TypeckTables::empty(None),
             access_levels: &access_levels,
             span_utils: SpanUtils::new(&tcx.sess),
             config: find_config(config),
diff --git a/src/test/ui/save-analysis/issue-64659.rs b/src/test/ui/save-analysis/issue-64659.rs
new file mode 100644
index 00000000000..a3d88a20377
--- /dev/null
+++ b/src/test/ui/save-analysis/issue-64659.rs
@@ -0,0 +1,10 @@
+// check-pass
+// compile-flags: -Zsave-analysis
+
+trait Trait { type Assoc; }
+
+fn main() {
+    struct Data<T: Trait> {
+        x: T::Assoc,
+    }
+}