test_winreg fails

[abbeyj]

BPO	6201
Nosy	@amauryfa, @benjaminp

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2009-06-09.23:10:28.888>
created_at = <Date 2009-06-05.06:45:41.071>
labels = ['tests', 'OS-windows']
title = 'test_winreg fails'
updated_at = <Date 2009-06-09.23:10:28.838>
user = 'https://bugs.python.org/abbeyj'

bugs.python.org fields:

activity = <Date 2009-06-09.23:10:28.838>
actor = 'amaury.forgeotdarc'
assignee = 'none'
closed = True
closed_date = <Date 2009-06-09.23:10:28.888>
closer = 'amaury.forgeotdarc'
components = ['Tests', 'Windows']
creation = <Date 2009-06-05.06:45:41.071>
creator = 'abbeyj'
dependencies = []
files = []
hgrepos = []
issue_num = 6201
keywords = []
message_count = 2.0
messages = ['88926', '89173']
nosy_count = 3.0
nosy_names = ['amaury.forgeotdarc', 'benjamin.peterson', 'abbeyj']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue6201'
versions = ['Python 2.7']

[abbeyj]

test_winreg fails with:
======================================================================
ERROR: testLocalMachineRegistryWorks (test.test_winreg.WinregTests)
----------------------------------------------------------------------

Traceback (most recent call last):
<snip>
  File "C:\Projects\python-trunk\lib\test\test_winreg.py", line 86, in
ReadTestData
    with OpenKey(key, "sub_key") as sub_key:
AttributeError: __exit__

---

_winreg.OpenKey() returns a PyHKEY. This type can no longer be used in
a "with" statement after r72912 introduced the SETUP_WITH opcode. The
old way used PyObject_GetAttr() to get __enter__ and __exit__ which
works fine with PyHKEY since it has a tp_getattr function. The new way
uses _PyObject_LookupSpecial() which uses the MRO and the dict of the
object.

I guess the right fix here is to update PyHKEY so it uses the modern
APIs but I don't know how to do this without breaking the special casing
for the "handle" member. Using T_INT isn't quite correct since it is a
pointer not an int.

[amauryfa]

Fixed with r73325.
2.7 really introduces an incompatibility here; I added an entry in the
whatsnew file.