From 2823f03a56451f3187a1d85ffcef107f00f6f48e Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Tue, 22 Aug 2000 02:04:46 +0000
Subject: Patch by Toby Dickenson: don't die when an error occurs during string
 conversion in an exception, but instead display <unprintable %s object> where
 %s is the type name.

---
 Lib/traceback.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Lib/traceback.py b/Lib/traceback.py
index d219340..b733598 100644
--- a/Lib/traceback.py
+++ b/Lib/traceback.py
@@ -166,9 +166,15 @@ def format_exception_only(etype, value):
 						s = s + ' '
 				list.append('%s^\n' % s)
 				value = msg
-		list.append('%s: %s\n' % (str(stype), str(value)))
+		list.append('%s: %s\n' % (str(stype), _some_str(value)))
 	return list
 
+def _some_str(value):
+	try:
+		return str(value)
+	except:
+		return '<unprintable %s object>' % type(value).__name__
+
 
 def print_exc(limit=None, file=None):
 	"""This is a shorthand for 'print_exception(sys.exc_type,
-- 
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