3 files changed, 5 insertions, 2 deletions

diff --git a/crates/ra_syntax/src/ast/generated.rs b/crates/ra_syntax/src/ast/generated.rs
index e2a92ae60..bcf753f78 100644
--- a/crates/ra_syntax/src/ast/generated.rs
+++ b/crates/ra_syntax/src/ast/generated.rs
@@ -934,6 +934,7 @@ impl AstNode for ExternCrateItem {
         &self.syntax
     }
 }
+impl ast::AttrsOwner for ExternCrateItem {}
 impl ExternCrateItem {
     pub fn name_ref(&self) -> Option<NameRef> {
         AstChildren::new(&self.syntax).next()
diff --git a/crates/ra_syntax/src/grammar.ron b/crates/ra_syntax/src/grammar.ron
index c14ee0e85..3e6c2d3f3 100644
--- a/crates/ra_syntax/src/grammar.ron
+++ b/crates/ra_syntax/src/grammar.ron
@@ -669,6 +669,7 @@ Grammar(
             collections: [("use_trees", "UseTree")]
         ),
         "ExternCrateItem": (
+            traits: ["AttrsOwner"],
             options: ["NameRef", "Alias"],
         ),
         "ArgList": (
diff --git a/crates/ra_syntax/src/ptr.rs b/crates/ra_syntax/src/ptr.rs
index 80e55d2aa..992034ef0 100644
--- a/crates/ra_syntax/src/ptr.rs
+++ b/crates/ra_syntax/src/ptr.rs
@@ -15,8 +15,9 @@ impl SyntaxNodePtr {
         SyntaxNodePtr { range: node.text_range(), kind: node.kind() }
     }
 
-    pub fn to_node(self, parent: &SyntaxNode) -> SyntaxNode {
-        successors(Some(parent.clone()), |node| {
+    pub fn to_node(self, root: &SyntaxNode) -> SyntaxNode {
+        assert!(root.parent().is_none());
+        successors(Some(root.clone()), |node| {
             node.children().find(|it| self.range.is_subrange(&it.text_range()))
         })
         .find(|it| it.text_range() == self.range && it.kind() == self.kind)