From 9f216675ddbdf3f5585800b2c183c6f6f1202b3e 2018-08-14 02:21:03
From: Matthias Bussonnier <bussonniermatthias@gmail.com>
Date: 2018-08-14 02:21:03
Subject: [PATCH] fix UnboundLocalError

---

diff --git a/IPython/core/interactiveshell.py b/IPython/core/interactiveshell.py
index b754011..97ade0d 100644
--- a/IPython/core/interactiveshell.py
+++ b/IPython/core/interactiveshell.py
@@ -2789,6 +2789,7 @@ class InteractiveShell(SingletonConfigurable):
         -------
         result : :class:`ExecutionResult`
         """
+        result = None
         try:
             result = self._run_cell(
                 raw_cell, store_history, silent, shell_futures)