1 files changed, 3 insertions, 2 deletions
diff --git a/subv.py b/subv.py
index ed30308..c8e6048 100644
--- a/subv.py
+++ b/subv.py
@@ -368,11 +368,12 @@ class LineIterator(object):
         return (self.segment, self.line)
 
     def exception(self, msg):
+        stream_name = getattr(self.stream, 'name', '(unnamed)')
         if self.line:
-            msg = msg + "\n{}:{}:  {}".format(self.stream.name, self.i, format(self.line))
+            msg = msg + "\n{}:{}:  {}".format(stream_name, self.i, format(self.line))
             msg = msg + "\nparsed as {}".format(dump(self.line))
         elif self.raw_line:
-            msg = msg + "\n{}:{}:  {}".format(self.stream.name, self.i, self.raw_line.strip())
+            msg = msg + "\n{}:{}:  {}".format(stream_name, self.i, self.raw_line.strip())
         return SubVException(msg)
 
 def with_parsed_lines(process_fn):