[Python-checkins] bpo-25612: Add minimal What's New in 3.7 entry (GH-7656)

[Ned Deily]

https://github.com/python/cpython/commit/04290cb9945eca1a97f6924495256c15f29fab41
commit: 04290cb9945eca1a97f6924495256c15f29fab41
branch: master
author: Ned Deily <nad at python.org>
committer: GitHub <noreply at github.com>
date: 2018-06-11T23:20:34-04:00
summary:

bpo-25612: Add minimal What's New in 3.7 entry (GH-7656)

files:
M Doc/whatsnew/3.7.rst

diff --git a/Doc/whatsnew/3.7.rst b/Doc/whatsnew/3.7.rst
index a7ea0af723a3..bb9c3aba387b 100644
--- a/Doc/whatsnew/3.7.rst
+++ b/Doc/whatsnew/3.7.rst
@@ -2442,3 +2442,8 @@ Due to a change in the way docstrings are handled by the compiler, the
 implicit ``return None`` in a function body consisting solely of a docstring
 is now marked as occurring on the same line as the docstring, not on the
 function's header line.
+
+The current exception state has been moved from the frame object to the co-routine.
+This simplified the interpreter and fixed a couple of obscure bugs caused by
+having swap exception state when entering or exiting a generator.
+(Contributed by Mark Shannon in :issue:`25612`.)