Auto merge of #24054 - servo:rustup, r=jdm

Upgrade to rustc 1.39.0-nightly (521d78407 2019-08-25)

<!-- Reviewable:start -->
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/24054)
<!-- Reviewable:end -->

3 files changed, 16 insertions, 27 deletions

diff --git a/components/script_plugins/unrooted_must_root.rs b/components/script_plugins/unrooted_must_root.rs
index d09dec3816a..bc99aa36d70 100644
--- a/components/script_plugins/unrooted_must_root.rs
+++ b/components/script_plugins/unrooted_must_root.rs
@@ -7,8 +7,8 @@ use rustc::hir::intravisit as visit;
 use rustc::hir::{self, ExprKind, HirId};
 use rustc::lint::{LateContext, LateLintPass, LintArray, LintContext, LintPass};
 use rustc::ty;
+use syntax::source_map;
 use syntax::symbol::sym;
-use syntax::{ast, source_map};
 
 declare_lint!(
     UNROOTED_MUST_ROOT,
@@ -143,23 +143,15 @@ impl LintPass for UnrootedPass {
 
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnrootedPass {
     /// All structs containing #[must_root] types must be #[must_root] themselves
-    fn check_struct_def(
-        &mut self,
-        cx: &LateContext<'a, 'tcx>,
-        def: &'tcx hir::VariantData,
-        _n: ast::Name,
-        _gen: &'tcx hir::Generics,
-        id: HirId,
-    ) {
-        let item = match cx.tcx.hir().get(id) {
-            hir::Node::Item(item) => item,
-            _ => cx.tcx.hir().expect_item(cx.tcx.hir().get_parent_item(id)),
-        };
+    fn check_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx hir::Item) {
         if item
             .attrs
             .iter()
-            .all(|a| !a.check_name(self.symbols.must_root))
+            .any(|a| a.check_name(self.symbols.must_root))
         {
+            return;
+        }
+        if let hir::ItemKind::Struct(def, ..) = &item.node {
             for ref field in def.fields() {
                 let def_id = cx.tcx.hir().local_def_id(field.hir_id);
                 if is_unrooted_ty(&self.symbols, cx, cx.tcx.type_of(def_id), false) {
@@ -171,7 +163,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnrootedPass {
     }
 
     /// All enums containing #[must_root] types must be #[must_root] themselves
-    fn check_variant(&mut self, cx: &LateContext, var: &hir::Variant, _gen: &hir::Generics) {
+    fn check_variant(&mut self, cx: &LateContext, var: &hir::Variant) {
         let ref map = cx.tcx.hir();
         if map
             .expect_item(map.get_parent_item(var.id))
diff --git a/components/script_plugins/webidl_must_inherit.rs b/components/script_plugins/webidl_must_inherit.rs
index dc05a15f6b1..83f00197c3e 100644
--- a/components/script_plugins/webidl_must_inherit.rs
+++ b/components/script_plugins/webidl_must_inherit.rs
@@ -2,7 +2,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
-use rustc::hir::{self, HirId};
+use rustc::hir;
 use rustc::lint::{LateContext, LateLintPass, LintArray, LintContext, LintPass};
 use rustc::ty;
 use std::boxed;
@@ -12,7 +12,6 @@ use std::fmt;
 use std::fs;
 use std::io;
 use std::path;
-use syntax::ast;
 use weedle;
 
 declare_lint!(
@@ -177,14 +176,12 @@ impl LintPass for WebIdlPass {
 }
 
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for WebIdlPass {
-    fn check_struct_def(
-        &mut self,
-        cx: &LateContext<'a, 'tcx>,
-        def: &'tcx hir::VariantData,
-        n: ast::Name,
-        _gen: &'tcx hir::Generics,
-        id: HirId,
-    ) {
+    fn check_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx hir::Item) {
+        let def = match &item.node {
+            hir::ItemKind::Struct(def, ..) => def,
+            _ => return,
+        };
+        let id = item.hir_id;
         let def_id = cx.tcx.hir().local_def_id(id);
         if !is_webidl_ty(&self.symbols, cx, cx.tcx.type_of(def_id)) {
             return;
@@ -201,7 +198,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for WebIdlPass {
             get_ty_name(&ty).to_string()
         });
 
-        let struct_name = n.to_string();
+        let struct_name = item.ident.to_string();
         match check_webidl(&struct_name, &parent_name) {
             Ok(()) => {},
             Err(e) => {
diff --git a/rust-toolchain b/rust-toolchain
index 4d27f47df80..9106e2241d1 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-nightly-2019-08-24
+nightly-2019-08-26