fixes #6069

1 files changed, 6 insertions, 2 deletions

diff --git a/components/plugins/lints/unrooted_must_root.rs b/components/plugins/lints/unrooted_must_root.rs
index 7a39f6cc4d5..e819f8d0e4d 100644
--- a/components/plugins/lints/unrooted_must_root.rs
+++ b/components/plugins/lints/unrooted_must_root.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 http://mozilla.org/MPL/2.0/. */
 
-use syntax::{ast, codemap, visit};
+use syntax::{ast, codemap, visit, ast_map};
 use syntax::attr::AttrMetaMethods;
 use rustc::lint::{Context, LintPass, LintArray};
 use rustc::middle::ty::expr_ty;
@@ -52,7 +52,11 @@ impl LintPass for UnrootedPass {
     }
     /// All structs containing #[must_root] types must be #[must_root] themselves
     fn check_struct_def(&mut self, cx: &Context, def: &ast::StructDef, _i: ast::Ident, _gen: &ast::Generics, id: ast::NodeId) {
-        if cx.tcx.map.expect_item(id).attrs.iter().all(|a| !a.check_name("must_root")) {
+        let item = match cx.tcx.map.get(id) {
+            ast_map::Node::NodeItem(item) => item,
+            _ => cx.tcx.map.expect_item(cx.tcx.map.get_parent(id)),
+        };
+        if item.attrs.iter().all(|a| !a.check_name("must_root")) {
             for ref field in def.fields.iter() {
                 lint_unrooted_ty(cx, &*field.node.ty,
                                  "Type must be rooted, use #[must_root] on the struct definition to propagate");