commit 51c2f6cd180df4acd4eec6317b46ef38a2bebe16
author Raymond Hettinger <python@rcn.com> Mon Jan 08 18:09:20 2007 +0000
committer Raymond Hettinger <python@rcn.com> Mon Jan 08 18:09:20 2007 +0000
tree 1098d156e970c0db414adaddce61b8b7888f6199
parent 1812f8cf3f47659a49712a3e2d633e82d1f09915

Fix zero-length corner case for iterating over a mutating deque.

Lib/test/test_deque.py

diff --git a/Lib/test/test_deque.py b/Lib/test/test_deque.py
index a562922..35e1536 100644
--- a/Lib/test/test_deque.py
+++ b/Lib/test/test_deque.py
@@ -396,6 +396,12 @@
         d.pop()
         self.assertRaises(RuntimeError, it.next)
 
+    def test_runtime_error_on_empty_deque(self):
+        d = deque()
+        it = iter(d)
+        d.append(10)
+        self.assertRaises(RuntimeError, it.next)
+
 class Deque(deque):
     pass