bugfix, 2.0.5

satella/instrumentation/trace_back.py

@@ -198,16 +198,21 @@ class Traceback(object):
             value_pickling_policy = policy()
 
         tb = sys.exc_info()[2]
-        while tb.tb_next:
-            tb = tb.tb_next
-
+        
         self.frames = []
-        f = tb.tb_frame
-        while f:
-            self.frames.append(StackFrame(f, value_pickling_policy))
-            f = f.f_back
 
-        self.formatted_traceback = six.text_type(traceback.format_exc())
+        if tb is None:
+            self.formatted_traceback = u'No exception.'
+        else:
+            while tb.tb_next:
+                tb = tb.tb_next
+
+            f = tb.tb_frame
+            while f:
+                self.frames.append(StackFrame(f, value_pickling_policy))
+                f = f.f_back
+
+            self.formatted_traceback = six.text_type(traceback.format_exc())
 
     def pickle(self):
         """Returns this instance, pickled"""

setup.py

@@ -2,7 +2,7 @@
 from setuptools import setup, find_packages
 
 setup(name='satella',
-      version='2.0.4a1',
+      version='2.0.5',
       description=u'Utilities for writing servers in Python',
       author=u'Piotr Maślanka',
       author_email='piotrm@smok.co',

tests/test_instrumentation/test_trace_back.py

@@ -8,6 +8,11 @@ from satella.instrumentation import Traceback
 
 
 class TestTraceback(unittest.TestCase):
+
+
+    def test_no_exc(self):
+        tb = Traceback()
+
     def test_tb(self):
 
         try: