rustdoc: Don't import macros from private imports

src/librustdoc/visit_ast.rs

@@ -23,6 +23,7 @@ use rustc::hir::def::Def;
 use rustc::hir::def_id::{DefId, LOCAL_CRATE};
 use rustc::middle::cstore::{LoadedMacro, CrateStore};
 use rustc::middle::privacy::AccessLevel;
+use rustc::ty::Visibility;
 use rustc::util::nodemap::FxHashSet;
 
 use rustc::hir;
@@ -204,7 +205,7 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
         self.inside_public_path = orig_inside_public_path;
         let def_id = self.cx.tcx.hir.local_def_id(id);
         if let Some(exports) = self.cx.tcx.module_exports(def_id) {
-            for export in exports.iter() {
+            for export in exports.iter().filter(|e| e.vis == Visibility::Public) {
                 if let Def::Macro(def_id, ..) = export.def {
                     if def_id.krate == LOCAL_CRATE || self.reexported_macros.contains(&def_id) {
                         continue // These are `krate.exported_macros`, handled in `self.visit()`.

src/test/rustdoc/issue-47038.rs

@@ -0,0 +1,20 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![feature(decl_macro)]
+
+#![crate_name = "foo"]
+
+use std::vec;
+
+// @has 'foo/index.html'
+// @!has - '//*[@id="macros"]' 'Macros'
+// @!has - '//a/@href' 'macro.vec.html'
+// @!has 'foo/macro.vec.html'

src/tools/linkchecker/main.rs

@@ -158,13 +158,6 @@ fn check(cache: &mut Cache,
        file.ends_with("sync/struct.RwLock.html") {
         return None;
     }
-    // FIXME(#47038)
-    if file.ends_with("deriving/generic/index.html") ||
-       file.ends_with("deriving/generic/macro.vec.html") ||
-       file.ends_with("deriving/custom/macro.panic.html") ||
-       file.ends_with("proc_macro_impl/macro.panic.html") {
-        return None;
-    }
 
     let res = load_file(cache, root, file, SkipRedirect);
     let (pretty_file, contents) = match res {