1 files changed, 1 insertions, 1 deletions
diff --git a/src/libsyntax/ast_map/mod.rs b/src/libsyntax/ast_map/mod.rs
index 257bfc632d8..a5458461a8b 100644
--- a/src/libsyntax/ast_map/mod.rs
+++ b/src/libsyntax/ast_map/mod.rs
@@ -496,7 +496,7 @@ impl<'ast> Map<'ast> {
         NodesMatchingSuffix {
             map: self,
             item_name: parts.last().unwrap(),
-            in_which: parts[..parts.len() - 1],
+            in_which: parts.slice_to(parts.len() - 1),
             idx: 0,
         }
     }