Added note of unittest.py changes that fixed bug 451309

diff --git a/Misc/NEWS b/Misc/NEWS
index 52b2a1effda1f1fa7450773fd6b0d0be21011c94..ceb1c066215d6ad6f73833d9fa07ad49f06b4a87 100644 (file)
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -108,6 +108,10 @@ Library
 - In restricted execution mode (using the rexec module), unmarshalling
   code objects is no longer allowed.  This plugs a security hole.
 
+- unittest.TestResult instances no longer store references to tracebacks
+  generated by test failures. This prevents unexpected dangling references
+  to objects that should be garbage collected between tests.
+
 Tools
 
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