From 0e0a99483e531be602311810c761dc506420e401 2011-10-29 08:46:13
From: Christian Boos <cboos@bct-technology.com>
Date: 2011-10-29 08:46:13
Subject: [PATCH] Follow-up to 387dcd6a, `_rl.__doc__` is `None` with pyreadline

---

diff --git a/IPython/utils/rlineimpl.py b/IPython/utils/rlineimpl.py
index d780fe3..c585ea9 100644
--- a/IPython/utils/rlineimpl.py
+++ b/IPython/utils/rlineimpl.py
@@ -86,7 +86,7 @@ uses_libedit = False
 
 if have_readline:
     # Official Python docs state that 'libedit' is in the docstring for libedit readline:
-    uses_libedit = 'libedit' in _rl.__doc__
+    uses_libedit = _rl.__doc__ and 'libedit' in _rl.__doc__
     # Note that many non-System Pythons also do not use proper readline,
     # but do not report libedit at all, nor are they linked dynamically against libedit.
     # known culprits of this include: EPD, Fink