diff --git a/components/script_plugins/unrooted_must_root.rs b/components/script_plugins/unrooted_must_root.rs
index bc99aa36d70..cfd8169934e 100644
--- a/components/script_plugins/unrooted_must_root.rs
+++ b/components/script_plugins/unrooted_must_root.rs
@@ -52,7 +52,7 @@ fn is_unrooted_ty(
 ) -> bool {
     let mut ret = false;
     ty.maybe_walk(|t| {
-        match t.sty {
+        match t.kind {
             ty::Adt(did, substs) => {
                 if cx.tcx.has_attr(did.did, sym.must_root) {
                     ret = true;
@@ -62,7 +62,7 @@ fn is_unrooted_ty(
                 } else if match_def_path(cx, did.did, &[sym.alloc, sym.rc, sym.Rc]) {
                     // Rc<Promise> is okay
                     let inner = substs.type_at(0);
-                    if let ty::Adt(did, _) = inner.sty {
+                    if let ty::Adt(did, _) = inner.kind {
                         if cx.tcx.has_attr(did.did, sym.allow_unrooted_in_rc) {
                             false
                         } else {
diff --git a/components/script_plugins/webidl_must_inherit.rs b/components/script_plugins/webidl_must_inherit.rs
index 83f00197c3e..063d99db2af 100644
--- a/components/script_plugins/webidl_must_inherit.rs
+++ b/components/script_plugins/webidl_must_inherit.rs
@@ -94,7 +94,7 @@ fn get_webidl_path(struct_name: &str) -> io::Result<path::PathBuf> {
 fn is_webidl_ty(symbols: &crate::Symbols, cx: &LateContext, ty: &ty::TyS) -> bool {
     let mut ret = false;
     ty.maybe_walk(|t| {
-        match t.sty {
+        match t.kind {
             ty::Adt(did, _substs) => {
                 if cx.tcx.has_attr(did.did, symbols.webidl) {
                     ret = true;
diff --git a/rust-toolchain b/rust-toolchain
index 756a627ce32..40b671b8aca 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-nightly-2019-09-24
+nightly-2019-09-27