[Python-checkins] cpython: whatsnew: LOAD_CLASSDEREF, -X showrefcount

Wed Feb 12 19:01:06 CET 2014

http://hg.python.org/cpython/rev/b18d4b6ccdc7
changeset: 89172:b18d4b6ccdc7
user: R David Murray <rdmurray at bitdance.com>
date: Wed Feb 12 13:00:36 2014 -0500
summary:
 whatsnew: LOAD_CLASSDEREF, -X showrefcount
files:
 Doc/reference/datamodel.rst | 2 ++
 Doc/whatsnew/3.4.rst | 8 ++++++++
 2 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst
--- a/Doc/reference/datamodel.rst
+++ b/Doc/reference/datamodel.rst
@@ -1647,6 +1647,8 @@
 that criterion, then the class definition will fail with ``TypeError``.
 
 
+.. _prepare:
+
 Preparing the class namespace
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
diff --git a/Doc/whatsnew/3.4.rst b/Doc/whatsnew/3.4.rst
--- a/Doc/whatsnew/3.4.rst
+++ b/Doc/whatsnew/3.4.rst
@@ -1455,6 +1455,10 @@
 now works correctly (previously it silently returned the first python
 module in the file). (Contributed by Václav Šmilauer in :issue:`16421`.)
 
+* A new opcode, :opcode:`LOAD_CLASSDEREF`, has been added to fix a bug in the
+ loading of free variables in class bodies that could be triggered by certain
+ uses of :ref:`__prepare__ <prepare>`. (Contributed by Benjamin Peterson in
+ :issue:`17853`.)
 
 
 Significant Optimizations
@@ -1650,6 +1654,10 @@
 how :envvar:`PATH` works. The behavior now conforms to the posix convention
 for :envvar:`PATH`.
 
+* The [X refs, Y blocks] output of a debug (``--with-pydebug``) build of the
+ CPython interpreter is now off by default. It can be re-enabled using the
+ ``-X showrefcount`` option. (Contributed by Ezio Melotti in :issue:`17323`.)
+
 
 Changes in the Python API
 -------------------------
-- 
Repository URL: http://hg.python.org/cpython
