Don't call ast.fix_missing_locations unless the AST could have been m…

…odified. Should close ipythongh-2879
takluyver · Feb 5, 2013 · 84cfd30 · 84cfd30
1 parent 6300dac
commit 84cfd30
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/IPython/core/interactiveshell.py b/IPython/core/interactiveshell.py
@@ -2695,7 +2695,9 @@ def transform_ast(self, node):
                 warn("AST transformer %r threw an error. It will be unregistered." % transformer)
                 self.ast_transformers.remove(transformer)
 
-        return ast.fix_missing_locations(node)
+        if self.ast_transformers:
+            ast.fix_missing_locations(node)
+        return node
 
 
     def run_ast_nodes(self, nodelist, cell_name, interactivity='last_expr',