Issue #28648: Fixed crash in Py_DecodeLocale() in debug build on Mac OS X

when decode astral characters.

diff --cc Misc/NEWS
index 6c9d0bcff99965d24653092988972ce6a4aab723,39ca04910a3a95fca34fbe24a7f361ac3dce1d59..42cab9bac889d5bbef86c6356ce276972c5d4deb
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -10,9 -10,9 +10,12 @@@ Release date: TB
  Core and Builtins
  -----------------
  
+ - Issue #28648: Fixed crash in Py_DecodeLocale() in debug build on Mac OS X
+   when decode astral characters.  Patch by Xiang Zhang.
+ 
 +- Issue #19398: Extra slash no longer added to sys.path components in case of
 +  empty compile-time PYTHONPATH components.
 +
  - Issue #28426: Fixed potential crash in PyUnicode_AsDecodedObject() in debug
    build.
  

diff --cc Objects/unicodeobject.c
Simple merge