commit 5b44cbe6d8f9c07f6ec0da1134dc3b49ee81a4e3
author Raymond Hettinger <python@rcn.com> Mon Jan 08 18:05:53 2007 +0000
committer Raymond Hettinger <python@rcn.com> Mon Jan 08 18:05:53 2007 +0000
tree 4efa4e2a2a22f3dd84ff1ea07411d7363ac15fe0
parent f96725af8bf2a394b85104be13583ff091c6a634

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