Issue #5734: BufferedRWPair was poorly tested and had several glaring bugs.
Patch by Brian Quinlan.
diff --git a/Misc/NEWS b/Misc/NEWS
index d7ee7b3..7cbe7a1 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -72,6 +72,9 @@
 Library
 -------
 
+- Issue #5734: BufferedRWPair was poorly tested and had several glaring
+  bugs. Patch by Brian Quinlan.
+
 - Issue #1161031: fix readwrite select flag handling: POLLPRI now
   results in a handle_expt_event call, not handle_read_event, and POLLERR
   and POLLNVAL now call handle_close, not handle_expt_event.  Also,