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whatsnew: LOAD_CLASSDEREF, -X showrefcount

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R David Murray 2014-02-12 13:00:36 -05:00
parent 8da4fb5a1c
commit af7d2c4917
2 changed files with 10 additions and 0 deletions
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Doc/reference/datamodel.rst
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@ -1647,6 +1647,8 @@ of these candidate metaclasses. If none of the candidate metaclasses meets
that criterion, then the class definition will fail with ``TypeError``.
.. _prepare:
Preparing the class namespace
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

8
Doc/whatsnew/3.4.rst
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@ -1455,6 +1455,10 @@ Other Improvements
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 @@ Changes in 'python' command behavior
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
-------------------------