Do not print caret when offset is None.
diff --git a/Lib/traceback.py b/Lib/traceback.py
index f887c05..82906a3 100644
--- a/Lib/traceback.py
+++ b/Lib/traceback.py
@@ -175,13 +175,14 @@
while i < len(line) and line[i].isspace():
i = i+1
list.append(' %s\n' % line.strip())
- s = ' '
- for c in line[i:offset-1]:
- if c.isspace():
- s = s + c
- else:
- s = s + ' '
- list.append('%s^\n' % s)
+ if offset is not None:
+ s = ' '
+ for c in line[i:offset-1]:
+ if c.isspace():
+ s = s + c
+ else:
+ s = s + ' '
+ list.append('%s^\n' % s)
value = msg
s = _some_str(value)
if s: