Fix SystemError and a wasps nest of ref counting issues.

1 files changed, 7 insertions, 0 deletions

diff --git a/Lib/test/test_range.py b/Lib/test/test_range.py
index 43fadf01d1..7650103bd0 100644
--- a/Lib/test/test_range.py
+++ b/Lib/test/test_range.py
@@ -71,6 +71,13 @@ class RangeTest(unittest.TestCase):
                 self.assertEquals(list(pickle.loads(pickle.dumps(r, proto))),
                                   list(r))
 
+    def test_odd_bug(self):
+        # This used to raise a "SystemError: NULL result without error"
+        # because the range validation step was eating the exception
+        # before NULL was returned.
+        with self.assertRaises(TypeError):
+            range([], 1, -1)
+
 def test_main():
     test.support.run_unittest(RangeTest)