diff --git a/components/net/Cargo.toml b/components/net/Cargo.toml
index 263364b63d01..f094e8174732 100644
--- a/components/net/Cargo.toml
+++ b/components/net/Cargo.toml
@@ -1,5 +1,3 @@
-cargo-features = ["rename-dependency"]
-
 [package]
 name = "net"
 version = "0.0.1"
diff --git a/components/net_traits/Cargo.toml b/components/net_traits/Cargo.toml
index 0bba5824d93e..f4dd6bd683d6 100644
--- a/components/net_traits/Cargo.toml
+++ b/components/net_traits/Cargo.toml
@@ -1,5 +1,3 @@
-cargo-features = ["rename-dependency"]
-
 [package]
 name = "net_traits"
 version = "0.0.1"
diff --git a/components/profile/Cargo.toml b/components/profile/Cargo.toml
index 6008c31b10ff..0c1abbffac77 100644
--- a/components/profile/Cargo.toml
+++ b/components/profile/Cargo.toml
@@ -1,5 +1,3 @@
-cargo-features = ["rename-dependency"]
-
 [package]
 name = "profile"
 version = "0.0.1"
diff --git a/components/script/Cargo.toml b/components/script/Cargo.toml
index 071c429d5840..56e6a586c85b 100644
--- a/components/script/Cargo.toml
+++ b/components/script/Cargo.toml
@@ -1,5 +1,3 @@
-cargo-features = ["rename-dependency"]
-
 [package]
 name = "script"
 version = "0.0.1"
diff --git a/components/script_plugins/lib.rs b/components/script_plugins/lib.rs
index 60a087da2543..7fdfb10fccea 100644
--- a/components/script_plugins/lib.rs
+++ b/components/script_plugins/lib.rs
@@ -14,7 +14,6 @@
 //!                       Use this for structs that correspond to a DOM type
 
 #![deny(unsafe_code)]
-#![feature(macro_at_most_once_rep)]
 #![feature(plugin)]
 #![feature(plugin_registrar)]
 #![feature(rustc_private)]
diff --git a/components/script_plugins/unrooted_must_root.rs b/components/script_plugins/unrooted_must_root.rs
index e7bc469b987f..73ebcd76065f 100644
--- a/components/script_plugins/unrooted_must_root.rs
+++ b/components/script_plugins/unrooted_must_root.rs
@@ -103,13 +103,13 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnrootedPass {
         _gen: &hir::Generics,
         id: ast::NodeId,
     ) {
-        let item = match cx.tcx.hir.get(id) {
+        let item = match cx.tcx.hir().get(id) {
             hir::Node::Item(item) => item,
-            _ => cx.tcx.hir.expect_item(cx.tcx.hir.get_parent(id)),
+            _ => cx.tcx.hir().expect_item(cx.tcx.hir().get_parent(id)),
         };
         if item.attrs.iter().all(|a| !a.check_name("must_root")) {
             for ref field in def.fields() {
-                let def_id = cx.tcx.hir.local_def_id(field.id);
+                let def_id = cx.tcx.hir().local_def_id(field.id);
                 if is_unrooted_ty(cx, cx.tcx.type_of(def_id), false) {
                     cx.span_lint(UNROOTED_MUST_ROOT, field.span,
                                  "Type must be rooted, use #[must_root] on the struct definition to propagate")
@@ -120,7 +120,7 @@ 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) {
-        let ref map = cx.tcx.hir;
+        let ref map = cx.tcx.hir();
         if map
             .expect_item(map.get_parent(var.node.data.id()))
             .attrs
@@ -130,7 +130,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnrootedPass {
             match var.node.data {
                 hir::VariantData::Tuple(ref fields, _) => {
                     for ref field in fields {
-                        let def_id = cx.tcx.hir.local_def_id(field.id);
+                        let def_id = cx.tcx.hir().local_def_id(field.id);
                         if is_unrooted_ty(cx, cx.tcx.type_of(def_id), false) {
                             cx.span_lint(
                                 UNROOTED_MUST_ROOT,
@@ -164,7 +164,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnrootedPass {
         };
 
         if !in_derive_expn(span) {
-            let def_id = cx.tcx.hir.local_def_id(id);
+            let def_id = cx.tcx.hir().local_def_id(id);
             let sig = cx.tcx.type_of(def_id).fn_sig(cx.tcx);
 
             for (arg, ty) in decl.inputs.iter().zip(sig.inputs().skip_binder().iter()) {
@@ -262,6 +262,6 @@ impl<'a, 'b, 'tcx> visit::Visitor<'tcx> for FnDefVisitor<'a, 'b, 'tcx> {
     fn visit_ty(&mut self, _: &'tcx hir::Ty) {}
 
     fn nested_visit_map<'this>(&'this mut self) -> hir::intravisit::NestedVisitorMap<'this, 'tcx> {
-        hir::intravisit::NestedVisitorMap::OnlyBodies(&self.cx.tcx.hir)
+        hir::intravisit::NestedVisitorMap::OnlyBodies(&self.cx.tcx.hir())
     }
 }
diff --git a/rust-toolchain b/rust-toolchain
index 0d3073c971ba..6f098ceaa7a4 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-nightly-2018-10-05
+nightly-2018-12-28