Issue #23782: Fixed possible memory leak in _PyTraceback_Add() and exception

loss in PyTraceBack_Here().

diff --cc Misc/NEWS
index 2b0397bf7d96b86841e29d23ffa8d49da8f2fcf9,2d50cf6ad53376a504ce3ea7e1d0bb134d794010..5d972fdea804ea73f5bcede44eb2d60b6ba2030d
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -10,40 -10,9 +10,43 @@@ What's New in Python 3.6.0 beta 
  Core and Builtins
  -----------------
  
+ - Issue #23782: Fixed possible memory leak in _PyTraceback_Add() and exception
+   loss in PyTraceBack_Here().
+ 
 +Library
 +-------
 +
 +- Issue #24452: Make webbrowser support Chrome on Mac OS X.
 +
 +- Issue #20766: Fix references leaked by pdb in the handling of SIGINT
 +  handlers.
 +
 +Build
 +-----
 +
 +- Issue #28208: Update Windows build to use SQLite 3.14.2.0.
 +
 +- Issue #28248: Update Windows build to use OpenSSL 1.0.2j.
 +
 +Tests
 +-----
 +
 +- Issue #28409: regrtest: fix the parser of command line arguments.
 +
 +
 +What's New in Python 3.6.0 beta 2
 +=================================
 +
 +*Release date: 2016-10-10*
 +
 +Core and Builtins
 +-----------------
 +
 +- Issue #28183: Optimize and cleanup dict iteration.
 +
 +- Issue #26081: Added C implementation of asyncio.Future.
 +  Original patch by Yury Selivanov.
 +
  - Issue #28379: Added sanity checks and tests for PyUnicode_CopyCharacters().
    Patch by Xiang Zhang.
  

diff --cc Python/traceback.c
Simple merge