Issue #16856: Fix a segmentation fault from calling repr() on a dict with

a key whose repr raise an exception.

diff --cc Misc/NEWS
index 310a0b28998cf1e844d72ab7d21ae8e4f4e9af2b,5741620f113e3bc792c19b064474f68c99881fc3..e63803960cb52eccd0152678f685d78cc0c062fa
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -10,8 -12,17 +10,11 @@@ What's New in Python 3.4.0 Alpha 1
  Core and Builtins
  -----------------
  
+ - Issue #16856: Fix a segmentation fault from calling repr() on a dict with
+   a key whose repr raise an exception.
+ 
  - Issue #16367: Fix FileIO.readall() on Windows for files larger than 2 GB.
  
 -- Issue #16455: On FreeBSD and Solaris, if the locale is C, the
 -  ASCII/surrogateescape codec is now used, instead of the locale encoding, to
 -  decode the command line arguments. This change fixes inconsistencies with
 -  os.fsencode() and os.fsdecode() because these operating systems announces an
 -  ASCII locale encoding, whereas the ISO-8859-1 encoding is used in practice.
 -
  - Issue #16761: Calling int() with base argument only now raises TypeError.
  
  - Issue #16759: Support the full DWORD (unsigned long) range in Reg2Py

diff --cc Objects/unicodeobject.c
Simple merge