suggest importing for partial mod path in name resolving

compiler/rustc_resolve/src/late.rs

@@ -3556,9 +3556,13 @@ impl<'a: 'ast, 'b, 'ast, 'tcx> LateResolutionVisitor<'a, 'b, 'ast, 'tcx> {
                 _ => return Some(parent_err),
             };
 
-            let (mut err, candidates) =
+            let (mut err, mut candidates) =
                 this.smart_resolve_report_errors(prefix_path, path_span, PathSource::Type, None);
 
+            if candidates.is_empty() {
+                candidates = this.smart_resolve_partial_mod_path_errors(prefix_path, path);
+            }
+
             // There are two different error messages user might receive at
             // this point:
             // - E0412 cannot find type `{}` in this scope