[issue29270] super call in ctypes sub-class fails in 3.6

[Nick Coghlan]

Nick Coghlan added the comment:

Eryk's diagnosis sounds right to me, and the suggested patch will get this back 
to working as well as it did in Python 3.5.

However, it's worth noting that that state itself was already broken when it 
comes to zero-argument super() support on the type definition with reversed 
endianness:

```
>>> import ctypes as ct
>>> class SuperText(ct.c_uint32):
... def __repr__(self):
... return super().__repr__()
... 
>>> SuperText.__ctype_le__(1)

>>> SuperText.__ctype_be__(1)
Traceback (most recent call last):
  File "", line 1, in 
  File "", line 3, in __repr__
TypeError: super(type, obj): obj must be an instance or subtype of type
```

The apparently nonsensical error message comes from both the original type and 
the type with swapped endianness having the same representation:

>>> SuperText.__ctype_le__

>>> SuperText.__ctype_be__


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[issue29006] 2.7.13 _sqlite more prone to "database table is locked"

[Armin Rigo]

Armin Rigo added the comment:

larry: unless someone else comments, I think now that the current status of 
3.5.3 is fine enough (nothing was done in this branch, and the problem I 
describe and just fixed in PyPy can be left for later).

The revert dd13098a5dc2 needs to be itself reverted in the 2.7 branch.

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[issue15527] Double parens in functions references

[Roundup Robot]

Roundup Robot added the comment:

New changeset be4da80b493e by Martin Panter in branch '2.7':
Issue #15527: remove double parens by changing markup.
https://hg.python.org/cpython/rev/be4da80b493e

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[issue29125] Shell injection via TIX_LIBRARY when using tkinter.tix

[Terry J. Reedy]

Terry J. Reedy added the comment:

In the original code, python interpolates tixlib into the string sent to and 
executed by tcl exec.  With the patch, tcl exec does the interpolation.  Not 
knowing anything in particular about tcl's exec, I found a value for tixlib 
that appears to validate Serhiy's claim that tcl exec does not rescan.

C:\Users\Terry>py -3.5
Python 3.5.2 (v3.5.2:4def2a2901a5, Jun 25 2016, 22:18:55) [MSC v.1900 64 bit 
(AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import tkinter as tk
>>> tka = tk.Tk().tk
>>> txlib =  '} python -c "print(999)"'
>>> tka.setvar('TIX_LIBRARY', txlib)
>>> tka.eval('global autopath; lappend auto_path {%s}' % txlib)
Traceback (most recent call last):
  File "", line 1, in 
_tkinter.TclError: extra characters after close-quote

>>> tka.eval('global autopath; lappend auto_path $TIX_LIBRARY')
'{C:\\Programs\\Python35\\tcl\\tcl8.6} C:/Programs/Python35/tcl C:/Programs/lib 
C:/Programs/Python35/tcl/tk8.6 C:/Programs/Python35/tcl/tk8.6/ttk \\}\\ 
python\\ -c\\ \\"print(999)\\"'

I don't understand exactly why (or when) TclError is raised. but it is only 
raised when python does the interpolation.  And for this string, only when '}' 
is present.  Without the '}', there is no exception and the interpolated string 
is simply appended, as with the new $TIX_LIBRARY code.

test_tix, such as it is, passes with the patch.  So unless I missed something 
the patch appears to be both safe and useful.

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[issue29270] super call in ctypes sub-class fails in 3.6

[Dave Jones]

Dave Jones added the comment:

I confess I'm going to have to read a bit more about Python internals before I 
can understand Eryk's analysis (this is my first encounter with "cell 
objects"), but many thanks for the rapid analysis and patch!

I'm not too concerned about the state being broken with reversed endianness; I 
don't think that's going to affect any of my use-cases in the near future, but 
it's certainly useful to know in case it does come up.

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[issue29270] super call in ctypes sub-class fails in 3.6

[Eryk Sun]

Eryk Sun added the comment:

OK, this is completely broken and needs a more thoughtful solution than my 
simpleminded hack. Here's a practical example of the problem, tested in 3.5.2:

class MyInt(ctypes.c_int):
def __repr__(self):
return super().__repr__()

class Struct(ctypes.BigEndianStructure):
_fields_ = (('i', MyInt),)

>>> s = Struct()
>>> s.i
Traceback (most recent call last):
  File "", line 1, in 
  File "", line 3, in __repr__
TypeError: super(type, obj): obj must be an instance or subtype of type

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[issue29270] super call in ctypes sub-class fails in 3.6

[Nick Coghlan]

Nick Coghlan added the comment:

Yeah, re-using Python-level method objects in different types is genuinely 
invalid when combined with __class__ or zero-argument super(), as there's no 
way to make the __class__ closure refer to two different classes at runtime - 
it will always refer back to the original defining class.

And while ctypes could be updated to do the right thing for functions, 
classmethod, staticmethod, abstractmethod, property, etc, there's nothing 
systematic it can do that would work for arbitrary descriptors (any of which 
may have a zero-argument-super-using method definition hidden inside their 
internal state).

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[issue29062] hashlib documentation link error

[Roundup Robot]

Roundup Robot added the comment:

New changeset ea0c488b9bac by INADA Naoki in branch '3.6':
Issue #29062: Doc: Fix make suspicious
https://hg.python.org/cpython/rev/ea0c488b9bac

New changeset 5c48fbe12cb8 by INADA Naoki in branch 'default':
Issue #29062: Doc: Fix make suspicious
https://hg.python.org/cpython/rev/5c48fbe12cb8

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[issue29062] hashlib documentation link error

[INADA Naoki]

INADA Naoki added the comment:

Martin, thank you for pointing it out.
I hadn't know about suspicious check.

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[issue25658] PyThread assumes pthread_key_t is an integer, which is against POSIX

[Masayuki Yamamoto]

Masayuki Yamamoto added the comment:

I commented at the Rietveld, since I think that patch needs a bit more 
modification.

* rename PyThread_ReInitTLS
* update comments and messages that have explained CPython TLS API

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[issue29125] Shell injection via TIX_LIBRARY when using tkinter.tix

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

TclError in Terry's example is raised because Tcl script has unpaired braces. 
You should add "{" at the end of TIX_LIBRARY.

Here is working exploit:

$ TIX_LIBRARY="/dev/null}; exec python3 -m this >spoiled; set x {"  python3 -c 
"from tkinter.tix import Tk; Tk()"

It creates the file "spoiled" in current directory containing The Zen of Python.

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[issue29274] Change “tests cases” → “test cases”

[Berker Peksag]

Changes by Berker Peksag :


--
nosy: +michael.foord

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[issue29270] super call in ctypes sub-class fails in 3.6

[Eryk Sun]

Eryk Sun added the comment:

Resolving this would be straightforward if we could use a subclass for the 
swapped type, but ctypes simple types behave differently for subclasses. A 
simple subclass doesn't automatically call the getfunc to get a converted value 
when returned as a function result, struct field, or array index.

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[issue29264] sparc/ffi.c:440 error: 'asm' undeclared

[Chi Hsuan Yen]

Chi Hsuan Yen added the comment:

Since Python 3.6, building ctypes with bundled libffi is deprecated. Please 
build libffi separately and configure CPython with --with-system-ffi.

This issue can be closed as third-party.

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nosy: +Chi Hsuan Yen

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[issue29062] hashlib documentation link error

[INADA Naoki]

Changes by INADA Naoki :


--
status: open -> closed

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[issue29240] Implementation of the PEP 540: Add a new UTF-8 mode

[Eryk Sun]

Eryk Sun added the comment:

> it should be replaced with sys.getfilesystemencodeerrors() 
> to support UTF-8 Strict mode.

I did that in the patch for issue 28188. The focus of the patch is to add bytes 
support on Windows for os.putenv and os.environb, but I also tried to maximize 
consistency (at least parallel structure) between the POSIX and Windows 
implementations.

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[issue29262] Provide a way to check for *real* typing.Union instances

[Evan]

Evan added the comment:

I'm also interested in this. I've been using 'thing.__origin__ is 
typing.Union', but this doesn't work in some of the older versions of typing.

--
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[issue29259] Add tp_fastcall to PyTypeObject: support FASTCALL calling convention for all callable objects

[INADA Naoki]

INADA Naoki added the comment:

I've created pull request about it:
https://github.com/haypo/cpython/pull/1

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[issue26296] colorsys rgb_to_hls algorithm error

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

> The modulus fixes it for exact numbers.  It doesn't produce exactly the same 
> result with floats, because of rounding.  Is that a problem?

I don't think that is a problem. The function uses a number of floating point 
operations producing inexact intermediate values. There is not an evidence that 
the proposed code produces more accurate value.

--
nosy: +serhiy.storchaka
resolution:  -> not a bug
stage: needs patch -> resolved
status: open -> closed

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[issue23407] os.walk always follows Windows junctions

[Craig Holmquist]

Craig Holmquist added the comment:

Here's a new patch:  now, _Py_attribute_data_to_stat and Py_DeleteFileW will 
just use the IsReparseTagNameSurrogate macro to determine if the file is a 
link, so os.walk etc. will know not to follow them.  os.readlink, however, will 
only work with junctions and symbolic links; otherwise it will raise ValueError 
with "unsupported reparse tag".

This way, there's a basic level of support for all name-surrogate tags, but 
os.readlink only works with the ones whose internal structure is (semi-) 
documented.

--
Added file: http://bugs.python.org/file46289/issue23407-3.patch

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[issue18235] _sysconfigdata.py wrong on AIX installations

[David Edelsohn]

David Edelsohn added the comment:

Michael, you need to build from scratch. The values are set and tweaked in 
various phases of configure and then written to _sysconfigdata.py for 
installation.

The values in the file reflect the values used during the build, but many of 
them are not used in an installed version of Python.

Three important phases are:

1) Building modules in the tree during the build process.
2) In-tree testing of build module feature.
3) Building and installing modules with an installed version of Python.

The initial configuration scripts must match the location where the export 
files will be installed. And the _sysconfigdata.py definitions used to build 
external modules in an installed version of Python must refer to the proper 
location.

All of the pieces are interconnected and must be tested in a wholistic manner. 
A partial rebuild does not test the impact of the patch.

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[issue29248] os.readlink fails on Windows

[Craig Holmquist]

Changes by Craig Holmquist :


--
keywords: +patch
Added file: http://bugs.python.org/file46290/issue29248.patch

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[issue23407] os.walk always follows Windows junctions

[Craig Holmquist]

Craig Holmquist added the comment:

New patch with spaces instead of tabs

--
Added file: http://bugs.python.org/file46291/issue23407-4.patch

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[issue29275] time module still has Y2K issues note

[Elizabeth Myers]

New submission from Elizabeth Myers:

It's 2017. I think it's time to remove the Y2K warning from this: 
https://docs.python.org/3/library/time.html :P. It's 17 years past the sell-by 
date for that notice.

--
assignee: docs@python
components: Documentation
messages: 285489
nosy: Elizacat, docs@python
priority: normal
severity: normal
status: open
title: time module still has Y2K issues note
versions: Python 2.7, Python 3.3, Python 3.4, Python 3.5, Python 3.6, Python 3.7

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[issue29275] time module still has Y2K issues note

[Elizabeth Myers]

Changes by Elizabeth Myers :


--
type:  -> enhancement

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[issue29276] HTMLParser in Python 2.7 doesn't recognize image tags wrapped up in link tags

[Ari]

New submission from Ari:

The following code produces incorrect results under Python 2.7.13. One would 
expect it to print 2 lines, "Encountered a start tag: a" and "Encountered a 
start tag: img". Yet it prints only "Encountered a start tag: a".

from HTMLParser import HTMLParser
class MyHTMLParser(HTMLParser):
def handle_starttag(self, tag, attrs):
print 'Encountered a start tag: %s' % tag
parser = MyHTMLParser()
parser.feed('http://somesite.com/large_image.jpg";>http://somesite.com/small_image.jpg"; width="800px" />')


Python 3.5.2 produces correct results on the same input and prints the expected 
"Encountered a start tag: a" and "Encountered a start tag: img".

from html.parser import HTMLParser
class MyHTMLParser(HTMLParser):
def handle_starttag(self, tag, attrs):
print("Encountered a start tag:", tag)
parser = MyHTMLParser()
parser.feed('http://somesite.com/large_image.jpg";>http://somesite.com/small_image.jpg"; width="800px" />')

--
components: Library (Lib)
messages: 285490
nosy: Ari
priority: normal
severity: normal
status: open
title: HTMLParser in Python 2.7 doesn't recognize image tags wrapped up in link 
tags
type: behavior
versions: Python 2.7

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[issue29276] HTMLParser in Python 2.7 doesn't recognize image tags wrapped up in link tags

[Xiang Zhang]

Xiang Zhang added the comment:

I can get the expected behaviour with the lastest 2.7 build.

Python 2.7.13+ (2.7:0d4e0a736688, Jan 15 2017, 00:51:57) 
[GCC 5.2.1 20151010] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from HTMLParser import HTMLParser
>>> class MyHTMLParser(HTMLParser):
... def handle_starttag(self, tag, attrs):
... print 'Encountered a start tag: %s' % tag
... 
>>> parser = MyHTMLParser()
>>> parser.feed('http://somesite.com/large_image.jpg";>>> src="http://somesite.com/small_image.jpg"; width="800px" />')
Encountered a start tag: a
Encountered a start tag: img

--
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[issue29277] os.getcwd failing on LOFS share

[miniflow]

New submission from miniflow:

I am calling os.getcwd and am occasionally seeing failures inside my program.  
This is not due to files missing as the files on the share are static.

Eror is:

[Errno 2] No such file or directory

Which is definitely not the case.

Can any sort of trace be done at the time of failure to detect if the issue is 
with python or the OS?

System is running Debian inside of an Illumos LX zone.

--
components: IO, Library (Lib)
messages: 285492
nosy: David Terk
priority: normal
severity: normal
status: open
title: os.getcwd failing on LOFS share
type: crash
versions: Python 2.7, Python 3.4

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[issue26865] Meta-issue: support of the android platform

[Xavier de Gaye]

Xavier de Gaye added the comment:

Current status:
---

Available using the pyona build system [1]:
  * Cross compilation of Python for a given Android API level and architecture 
with android-ndk-r13b.
  * Cross compilation of third party extension modules (currently as a patch).
  * Interactive interpreter with curses and readline support, the Android adb 
(remote) shell is used to start the interpreter on the qemu emulator or a 
device connected with USB.
  * Remote debugging with gdb and support of the python-gdb module.
  * The adb shell is used to start a run of the test suite on the emulator or a 
device.

To be defined for the support of the Android platform:
  * Support starting with which Python release ?
 sys.getandroidapilevel() has been defined in Python 3.7 by issue 28740, so 
unless this enhancement is backported to 3.6 the first release to support 
Android could be 3.7.
  * What is the supported Android API level(s) [2] ?
 Level 21 is the first to provide a reliable wide character support.
 Level 24 is the most recent api level currently supported by the NDK and 
is the first where the adb shell is run as the 'shell' user instead of as 
'root' and as a consequence, where the test suite must now cope with Android 
SELinux non permitted operations (hard link, mkfifo, mknod, bind on a unix 
socket).
  * On which architecture(s) ?
 The x86 platform is useful for testing and debugging as it runs fast on 
the Android qemu emulator.
 AFAIK the armv7 platform is still one of the most widespread Android 
platforms [3] [4].
  * Building with which NDK version ?
 The next android-ndk-r14 release is the first to provide "Unified 
headers", see issue #29040.
  * The buildbots run the test suite on the Android qemu emulator or on a 
device or both ?

Test suite results on the Android qemu emulator:
  test_builtin is excluded in all the tests - test_asyncio is excluded on 
armv7-android-api-21.
  x86 platform (duration: about 27 minutes, to be compared with 26 minutes when 
the test suite is run natively on the same laptop).
api 21: success
api 24: success
  armv7 platform (duration: about 410 minutes. Without the latest released 
libffi-3.2.1 that does not build on armv7).
api 21: success
api 24: success

Remaining issues:
1) Blocker issues:
  test_builtin:
issue #13886: failure when test_readline is run before test_builtin.
  This problem is not specific to Android.
  test_asyncio:
issue #26858: android: setting SO_REUSEPORT fails
  Failure only on armv7 at api 21.

2) Issues with a patch tested successfully on x86 and armv7 at Android api 21 
and 24:
  Build:
issue #28833: cross compilation of third-party extension modules.
  PermissionError raised at api 24:
test_eintr test_genericpath test_pathlib test_posix test_shutil test_stat
  issue #28759: access to mkfifo, mknod and hard links is controled by 
SELinux MAC on Android
test_os:
  issue #29180: skip tests that raise PermissionError in test_os (non-root 
user on Android)
test_tarfile:
  issue #29181: skip tests that raise PermissionError in test_tarfile 
(non-root user on Android)
test_socketserver:
  issue #29184: skip tests of test_socketserver when bind() raises 
PermissionError (non-root user on Android)
test_distutils:
  issue #29185: test_distutils fails on Android api 24
test_asyncio:
  issue #28684: [asyncio] bind() on a unix socket raises PermissionError on 
Android for a non-root user.
  Miscellaneous:
test_asyncio:
  issue #28562: test_asyncio fails on Android upon calling getaddrinfo().
test_readline:
  issue #28997: test_readline.test_nonascii fails on Android.
test_curses:
  issue #29176: /tmp does not exist on Android and is used by 
curses.window.putwin()

3) Enhancement issues:
  issue #26855: android: add platform.android_ver().
  issue #27659: Prohibit implicit C function declarations.
  issue #29040: building Android with android-ndk-r14.

4) Languishing issues:
  issue #22724: byte-compile fails for cross-builds.
  issue #27606: Android cross-built for armv5te with clang and '-mthumb' 
crashes with SIGSEGV or SIGILL.
  issue #26852: add the '--enable-sourceless-distribution' option to configure.
  issue #27640: add the '--disable-test-suite' option to configure.

[1] https://bitbucket.org/xdegaye/pyona
[2] Andoid versions:
  Android Version  ReleasedAPI Level  Name
  Android 7.1  October 201625 Nougat
  Android 7.0  August 2016 24 Nougat
  Android 6.0  August 2015 23 Marshmallow
  Android 5.1  March 2015  22 Lollipop
  Android 5.0  November 2014   21 Lollipop
  Android 4.4W June 2014   20 Kitkat Watch
  Android 4.4  October 201319 Kitkat
  Android 4.3  July 2013   18 Jelly Bean
  A

[issue29276] HTMLParser in Python 2.7 doesn't recognize image tags wrapped up in link tags

[Brendan Donegan]

Brendan Donegan added the comment:

I even get the correct behaviour in 2.7.12:
Python 2.7.12+ (default, Sep 17 2016, 12:08:02) 
[GCC 6.2.0 20160914] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from HTMLParser import HTMLParser
>>> class MyHTMLParser(HTMLParser):
... def handle_starttag(self, tag, attrs):
... print("Encountered a start tag: %s" % tag)
... 
>>> parser = MyHTMLParser()
>>> parser.feed('http://somesite.com/large_image.jpg";>>> src="http://somesite.com/small_image.jpg"; width="800px" />')
Encountered a start tag: a
Encountered a start tag: img

Ari, can you provide more info about the exact version and platform you are 
using?

--
nosy: +brendan-donegan

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[issue29276] HTMLParser in Python 2.7 doesn't recognize image tags wrapped up in link tags

[Ari]

Ari added the comment:

Sorry, it was a false alarm. I had a poorly constructed testcase. I was trying 
to grab all image links from html markup while simultaneously substituting 
image links to somesite.com with links to anothersite.com. I had 
handle_starttag and handle_startendtag defined in my class, but all the image 
processing resided in handle_starttag, and I didn't realize that 
handle_starttag is not automatically called when handle_startendtag is 
executed. So http://somesite.com/small_image.jpg"; width="800px" /> 
went straight to handle_startendtag, and it did nothing to process the image 
link because handle_starttag was never called. When I removed 
handle_startendtag definition, I got the link I wanted (but the absense of 
handle_startendtag totally mangled the markup I was trying to produce).

--
resolution:  -> not a bug
status: open -> closed

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[issue29275] time module still has Y2K issues note

[SilentGhost]

SilentGhost added the comment:

The main message there is about the parsing of the two-digit year, so while it 
might worth it to remove the mention of Y2K, it would only be a minor change.

--
nosy: +SilentGhost

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[issue29256] Windows select() errors out when given no fds to select on, which breaks SelectSelector

[Eryk Sun]

Eryk Sun added the comment:

Some WinSock functions are just dispatchers that call a provider function. The 
dispatch table is set up when WinSock (i.e. ws2_32.dll) calls the WSPStartup 
function [1] of a provider DLL (e.g. mswsock.dll). In the case of select(), it 
calls the socket provider's WSPSelect function [2]. It determines the provider 
from the first socket found in the order of readfds, writefds, and exceptfds. 
It fails if there isn't at least one socket from which it can determine the 
provider. Also, given this design, each socket in all three sets has to be from 
the same provider. 

In general, using a dummy socket isn't a good workaround for using select() to 
implement a sleep function. WSPSelect can't be interrupted (or rather, it can 
only be interrupted temporarily to execute an asynchronous procedure call 
that's queued to the thread via QueueUserAPC, after which it resumes waiting). 
If a script uses select() with a dummy socket to sleep on the main thread, the 
user won't be able to cancel the wait with Ctrl+C. It would be better in this 
case if select.select waited on the SIGINT event like the Windows 
implementation of time.sleep.

[1]: https://msdn.microsoft.com/en-us/library/ms742296
[2]: https://msdn.microsoft.com/en-us/library/ms742289

--
components: +Windows
nosy: +eryksun, paul.moore, steve.dower, tim.golden, zach.ware

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[issue20180] Derby #11: Convert 50 sites to Argument Clinic across 9 files

[INADA Naoki]

INADA Naoki added the comment:

Updated patch for unicodeobject.

@taleinat, could you confirm it?

--
nosy: +inada.naoki
Added file: http://bugs.python.org/file46292/unicodeobject.c.v6.patch

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[issue23407] os.walk always follows Windows junctions

[Eryk Sun]

Eryk Sun added the comment:

Craig, can you add a patch for issue 29248, including a test based on the "All 
Users" link?

--
dependencies: +os.readlink fails on Windows

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[issue20180] Derby #11: Convert 50 sites to Argument Clinic across 9 files

[INADA Naoki]

INADA Naoki added the comment:

transmogrify.h uses hack to share docstring.
I can't find straightforward way.

--

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[issue29248] os.readlink fails on Windows

[Craig Holmquist]

Craig Holmquist added the comment:

New patch with test.

I'm not sure if C:\Users\All Users and C:\ProgramData exist with those names on 
non-English installations of Windows.  I set the test to skip if they aren't 
found.

--
nosy: +craigh
Added file: http://bugs.python.org/file46293/issue29248-2.patch

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[issue18235] _sysconfigdata.py wrong on AIX installations

[Michael Felt]

Michael Felt added the comment:

Ok. I shall rebuild from scratch.

When I do, I start from a "clean" system - only the compiler and my mkinstallp 
helper script.

I am adding the latest zlib for what I would package but I shall forgoe that 
for this test.

--

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[issue22302] Windows os.path.isabs UNC path bug

[Eryk Sun]

Changes by Eryk Sun :


--
stage:  -> needs patch
versions: +Python 3.6, Python 3.7 -Python 3.3, Python 3.4

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[issue22302] Windows os.path.isabs UNC path bug

[Eryk Sun]

Changes by Eryk Sun :


--
Removed message: http://bugs.python.org/msg226094

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[issue29278] Python 3.6 build fails with parallel make

[Utku Gultopu]

New submission from Utku Gultopu:

Version Info

Linux 4.4.0-59-generic #80-Ubuntu SMP x86_64 x86_64 x86_64 GNU/Linux

Issue
=
When the multiple jobs option (`make -j`) is specified, build fails after 
compiling the `structmember.c` file. Subsequent compilation attempts show the 
following message:

gcc: internal compiler error: Killed (program cc1)
Please submit a full bug report,
with preprocessed source if appropriate.
See  for instructions.

--
components: Build
messages: 285503
nosy: ugultopu
priority: normal
severity: normal
status: open
title: Python 3.6 build fails with parallel make
type: compile error
versions: Python 3.6

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