1 files changed, 4 insertions, 1 deletions
diff --git a/src/libsyntax/visit.rs b/src/libsyntax/visit.rs
index 64393a295de..117787d08c7 100644
--- a/src/libsyntax/visit.rs
+++ b/src/libsyntax/visit.rs
@@ -846,7 +846,10 @@ pub fn walk_vis<'a, V: Visitor<'a>>(visitor: &mut V, vis: &'a Visibility) {
 }
 
 pub fn walk_attribute<'a, V: Visitor<'a>>(visitor: &mut V, attr: &'a Attribute) {
-    visitor.visit_tts(attr.item.tokens.clone());
+    match attr.kind {
+        AttrKind::Normal(ref item) => visitor.visit_tts(item.tokens.clone()),
+        AttrKind::DocComment(_) => {}
+    }
 }
 
 pub fn walk_tt<'a, V: Visitor<'a>>(visitor: &mut V, tt: TokenTree) {