From ace81e3a57cb86e774426ef48d8f9cfd9ede2b2b Mon Sep 17 00:00:00 2001
From: Jeroen Demeyer <jdemeyer@cage.ugent.be>
Date: Wed, 5 Jul 2017 17:04:33 +0200
Subject: [PATCH] Compare as str, not unicode and str

---
 IPython/core/ultratb.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/IPython/core/ultratb.py b/IPython/core/ultratb.py
index 98e2cd586fa..b24752964c4 100644
--- a/IPython/core/ultratb.py
+++ b/IPython/core/ultratb.py
@@ -438,7 +438,7 @@ def is_recursion_error(etype, value, records):
     # by stack frames in IPython itself. >500 frames probably indicates
     # a recursion error.
     return (etype is recursion_error_type) \
-           and "recursion" in str(value).lower() \
+           and str("recursion") in str(value).lower() \
            and len(records) > 500
 
 def find_recursion(etype, value, records):