From c8420db21d6d64ed9ce8c7937ad7ceda0eee8d20 Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume1.gomez@gmail.com>
Date: Mon, 14 Oct 2019 13:13:38 +0200
Subject: [PATCH] Create new error code E0740 for visibility restrictions to
 ancestor module issues

---
 src/librustc_resolve/build_reduced_graph.rs | 6 +++---
 src/librustc_resolve/error_codes.rs         | 1 +
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/librustc_resolve/build_reduced_graph.rs b/src/librustc_resolve/build_reduced_graph.rs
index c18bdfad22c..3564aefba73 100644
--- a/src/librustc_resolve/build_reduced_graph.rs
+++ b/src/librustc_resolve/build_reduced_graph.rs
@@ -256,9 +256,9 @@ impl<'a, 'b> BuildReducedGraphVisitor<'a, 'b> {
                                 if self.r.is_accessible_from(vis, parent_scope.module) {
                                     vis
                                 } else {
-                                    let msg =
-                                        "visibilities can only be restricted to ancestor modules";
-                                    self.r.session.span_err(path.span, msg);
+                                    struct_span_err!(self.r.session, path.span, E0741,
+                                        "visibilities can only be restricted to ancestor modules")
+                                        .emit();
                                     ty::Visibility::Public
                                 }
                             }
diff --git a/src/librustc_resolve/error_codes.rs b/src/librustc_resolve/error_codes.rs
index 9515c87ce4b..b76373703d1 100644
--- a/src/librustc_resolve/error_codes.rs
+++ b/src/librustc_resolve/error_codes.rs
@@ -1953,4 +1953,5 @@ struct Foo<X = Box<Self>> {
 //  E0470, removed
     E0577,
     E0578,
+    E0740,
 }