1 files changed, 3 insertions, 0 deletions
diff --git a/lib/ast.js b/lib/ast.js
index b4b47651..331d340b 100644
--- a/lib/ast.js
+++ b/lib/ast.js
@@ -314,6 +314,9 @@ var AST_Scope = DEFNODE("Scope", "variables functions uses_with uses_eval parent
         if (this.functions) node.functions = this.functions.clone();
         if (this.enclosed) node.enclosed = this.enclosed.slice();
         return node;
+    },
+    pinned: function() {
+        return this.uses_eval || this.uses_with;
     }
 }, AST_Block);