Always pop nodes in recursion detector

jedi/evaluate/recursion.py

@@ -49,6 +49,7 @@ per_function_recursion_limit = 2
 A function may not be executed more than this number of times recursively.
 """
 
+
 class RecursionDetector(object):
     def __init__(self):
         self.pushed_nodes = []
@@ -67,8 +68,10 @@ def execution_allowed(evaluator, node):
                       node.start_pos)
         yield False
     else:
+        try:
             pushed_nodes.append(node)
             yield True
+        finally:
             pushed_nodes.pop()