[issue10746] ctypes c_long & c_bool have incorrect PEP-3118 type codes

[Pauli Virtanen]

Changes by Pauli Virtanen :


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[issue10746] ctypes c_long & c_bool have incorrect PEP-3118 type codes

[Pauli Virtanen]

Pauli Virtanen added the comment:

Created backport PR for 3.6: https://github.com/python/cpython/pull/3241
Which versions take backports?

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[issue10746] ctypes c_long & c_bool have incorrect PEP-3118 type codes

[Antoine Pitrou]

Antoine Pitrou added the comment:

At this point, 2.7 and 3.6 do.

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[issue10746] ctypes c_long & c_bool have incorrect PEP-3118 type codes

[Pauli Virtanen]

Changes by Pauli Virtanen :


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[issue30581] os.cpu_count() returns wrong number of processors on system with > 64 logical processors

[Antoine Pitrou]

Antoine Pitrou added the comment:


New changeset c67bae04780f9d7590f9f91b4ee5f31c5d75b3c3 by Antoine Pitrou 
(Christopher Wilcox) in branch 'master':
bpo-30581: Windows: os.cpu_count() returns wrong number of processors (#2934)
https://github.com/python/cpython/commit/c67bae04780f9d7590f9f91b4ee5f31c5d75b3c3


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[issue30581] os.cpu_count() returns wrong number of processors on system with > 64 logical processors

[Antoine Pitrou]

Antoine Pitrou added the comment:

Fixed.  Someone might backport this to 3.6 if they want.

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status: open -> closed
versions:  -Python 3.5

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[issue10746] ctypes c_long & c_bool have incorrect PEP-3118 type codes

[Antoine Pitrou]

Antoine Pitrou added the comment:


New changeset 2d1653aa43cf02e6b74f9d4f178fac9969a293e2 by Antoine Pitrou (Pauli 
Virtanen) in branch '3.6':
[3.6] bpo-10746: Fix ctypes PEP 3118 type codes for c_long, c_bool, c_int 
(GH-31) (#3241)
https://github.com/python/cpython/commit/2d1653aa43cf02e6b74f9d4f178fac9969a293e2


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[issue29753] Ctypes Packing Bitfields Incorrectly - Linux

[Antti Haapala]

Antti Haapala added the comment:

To Charles first: "Gives back a sizeof of 8 on Windows and 10 on Linux. The 
inconsistency makes it difficult to have code work cross-platform." 

The bitfields in particular and ctypes in general have *never* been meant to be 
cross-platform - instead they just must need to match the particular C compiler 
behaviour of the platform, thus the use of these for cross platform work is 
ill-advised - perhaps you should just use the struct module instead.

However, that said, on Linux, sizeof these structures - packed or not - do not 
match the output from GCC; unpacked one has sizeof 12 and packed 10 on my 
Python 3.5, but they're both 8 bytes on GCC. This is a real bug.

GCC says that the bitfield behaviour is: 
https://gcc.gnu.org/onlinedocs/gcc-4.9.1/gcc/Structures-unions-enumerations-and-bit-fields-implementation.html

Whether a bit-field can straddle a storage-unit boundary (C90 6.5.2.1, C99 and 
C11 6.7.2.1).

Determined by ABI.
The order of allocation of bit-fields within a unit (C90 6.5.2.1, C99 and C11 
6.7.2.1).

Determined by ABI.
The alignment of non-bit-field members of structures (C90 6.5.2.1, C99 and C11 
6.7.2.1).

Determined by ABI. 

Thus, the actual behaviour need to be checked from the API documentation of the 
relevant platform. However - at least for unpacked structs - the x86-64 
behaviour is that a bitfield may not cross an addressable unit.

--
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title: Ctypes Packing Incorrectly - Linux -> Ctypes Packing Bitfields 
Incorrectly - Linux

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[issue31291] zipimport.zipimporter.get_data() crashes when path.replace() returns a non-str

[Oren Milman]

Changes by Oren Milman :


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[issue31291] zipimport.zipimporter.get_data() crashes when path.replace() returns a non-str

[Serhiy Storchaka]

Serhiy Storchaka added the comment:


New changeset 095a421b1606ee27e00a5d9d253b05a9f0cfadb8 by Serhiy Storchaka 
(Oren Milman) in branch '3.6':
[3.6] bpo-31291: Fixed an assertion failure in zipimport.zipimporter.get_data() 
(GH-3226) (#3243)
https://github.com/python/cpython/commit/095a421b1606ee27e00a5d9d253b05a9f0cfadb8


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[issue31291] zipimport.zipimporter.get_data() crashes when path.replace() returns a non-str

[Serhiy Storchaka]

Changes by Serhiy Storchaka :


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[issue31108] add __contains__ for list_iterator (and others) for better performance

[Antoine Pitrou]

Antoine Pitrou added the comment:

I don't think I've ever used `in` on an iterator.  I didn't even expect it to 
work, and would not consider its use a good practice.

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[issue28287] Refactor subprocess.Popen to let a subclass handle IO asynchronously

[Antoine Pitrou]

Changes by Antoine Pitrou :


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[issue17611] Move unwinding of stack for "pseudo exceptions" from interpreter to compiler.

[Serhiy Storchaka]

Changes by Serhiy Storchaka :


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[issue24340] co_stacksize estimate can be highly off

[Serhiy Storchaka]

Changes by Serhiy Storchaka :


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[issue31113] Stack overflow with large program

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Ned, Benjamin, what do you think about backporting this change to 3.6 and 2.7? 
On one hand, the change is not trivial and looks like a new feature. On other 
hand, this can be considered as a platform specific bug, the compiler works 
with a large generated code on Linux, but crashes on Windows.

I don't know how to increase the stack size on Windows, but if it is an option, 
it looks preferable to me on 2.7 and 3.6.

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[issue24340] co_stacksize estimate can be highly off

[Serhiy Storchaka]

Changes by Serhiy Storchaka :


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[issue17611] Move unwinding of stack for "pseudo exceptions" from interpreter to compiler.

[Serhiy Storchaka]

Changes by Serhiy Storchaka :


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[issue17611] Move unwinding of stack for "pseudo exceptions" from interpreter to compiler.

[Serhiy Storchaka]

Changes by Serhiy Storchaka :


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[issue28287] Refactor subprocess.Popen to let a subclass handle IO asynchronously

[Antoine Pitrou]

Changes by Antoine Pitrou :


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[issue28287] Refactor subprocess.Popen to let a subclass handle IO asynchronously

[Antoine Pitrou]

Antoine Pitrou added the comment:

By the way, we're using GitHub PRs now for development, though you can still 
submit patch files if you prefer that.

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[issue17611] Move unwinding of stack for "pseudo exceptions" from interpreter to compiler.

[Serhiy Storchaka]

Changes by Serhiy Storchaka :


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[issue31113] Stack overflow with large program

[Ned Deily]

Ned Deily added the comment:

I agree with Antoine's comment on the PR: this seems like this should only go 
into 3.7.  From the description here, it sounds like this is an edge-case 
problem that hasn't come up before as an issue.  Let's do the right thing in 
master (for 3.7) and try to come up with a workaround for 3.6.x (like 
increasing the stack size).  And doing that does not prevent us from deciding 
later to backport to 3.6.x once we have some experience with the changes in 
master.

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[issue31307] ConfigParser.read silently fails if filenames argument is a byte string

[Vincent Michel]

New submission from Vincent Michel:

Calling `config_parser.read` with `'test'` is equivalent to:

config_parser.read(['test'])

while calling `config_parser.read` with `b'test'` is treated as:

config_parser.read([116, 101, 115, 116])

which means python will try to open the file descriptors 101, 115 and 116.

I don't know if byte path should be supported, but this is probably not the 
expected behavior.

The method code: 
https://github.com/python/cpython/blob/master/Lib/configparser.py#L678-L702

--
components: Library (Lib)
messages: 301026
nosy: vxgmichel
priority: normal
severity: normal
status: open
title: ConfigParser.read silently fails if filenames argument is a byte string
type: behavior
versions: Python 3.7

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[issue31308] forkserver process isn't re-launched if it died

[Antoine Pitrou]

New submission from Antoine Pitrou:

It may happen that the forkserver process dies (for example if SIGINT is 
received because the user pressed Ctrl-C) while the parent process is still 
alive.  In that case, if the parent tries to create a new Process instance, an 
exception is received.

The exception looks like this:

  File "/xxx/lib/python3.5/multiprocessing/popen_forkserver.py", line 52, in 
_launch
self.sentinel, w = forkserver.connect_to_new_process(self._fds)
  File "/xxx/lib/python3.5/multiprocessing/forkserver.py", line 66, in 
connect_to_new_process
client.connect(self._forkserver_address)
ConnectionRefusedError: [Errno 111] Connection refused

--
components: Library (Lib)
messages: 301027
nosy: pitrou
priority: normal
severity: normal
stage: needs patch
status: open
title: forkserver process isn't re-launched if it died
type: behavior
versions: Python 3.6, Python 3.7

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[issue31308] forkserver process isn't re-launched if it died

[Antoine Pitrou]

Changes by Antoine Pitrou :


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[issue31308] forkserver process isn't re-launched if it died

[Antoine Pitrou]

Changes by Antoine Pitrou :


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[issue31307] ConfigParser.read silently fails if filenames argument is a byte string

[R. David Murray]

Changes by R. David Murray :


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[issue31309] Tkinter root window does not close if used with matplotlib.pyplot

[Philipp]

New submission from Philipp:

Today I ran into a problem when using both tkinter and matplotlib.pyplot at the 
same time. I thought it would be best to let you know, in case it is an issue. 

The problem is/was that the root window did not close itself, when just using 
`askopenfilename()`. 

A complete description of the problem, including a minimal working example, 
screenshots and a "solution" can be found on StackOverflow: 
https://stackoverflow.com/q/45960815/7414040 

I think that the function `askopenfilename()` does not ensure that the tkinter 
root window, that has been opened, is destroyed after the function call ended.

--
assignee: terry.reedy
components: IDLE, Tkinter, Windows
messages: 301028
nosy: paul.moore, psiehr, steve.dower, terry.reedy, tim.golden, zach.ware
priority: normal
severity: normal
status: open
title: Tkinter root window does not close if used with matplotlib.pyplot
type: behavior
versions: Python 3.5

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[issue31310] semaphore tracker isn't protected against crashes

[Antoine Pitrou]

New submission from Antoine Pitrou:

Similar to bpo-31308, but pertaining to multiprocessing's semaphore tracker 
process.

--
components: Library (Lib)
messages: 301029
nosy: davin, pitrou
priority: normal
severity: normal
stage: needs patch
status: open
title: semaphore tracker isn't protected against crashes
type: behavior
versions: Python 3.6, Python 3.7

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[issue31310] semaphore tracker isn't protected against crashes

[Antoine Pitrou]

Changes by Antoine Pitrou :


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[issue30737] Update devguide link to the new URL

[Mariatta Wijaya]

Mariatta Wijaya added the comment:


New changeset 384899dfaeb83db38a6d3846d3cbc2f58a6605cd by Mariatta (Lisa Hewus 
Fresh) in branch 'master':
bpo-30737: Update DevGuide links to new URL (GH-3228)
https://github.com/python/cpython/commit/384899dfaeb83db38a6d3846d3cbc2f58a6605cd


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[issue31292] `python setup.py check --restructuredtext` fails when a include directive is present.

[flying sheep]

flying sheep added the comment:

I should have linked the file: distutils/command/check.py

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[issue30737] Update devguide link to the new URL

[Mariatta Wijaya]

Changes by Mariatta Wijaya :


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stage: patch review -> backport needed

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[issue31309] Tkinter root window does not close if used with matplotlib.pyplot

[Terry J. Reedy]

Terry J. Reedy added the comment:

This is purely a tkinter issue.  Windows people can ignore this.

Your problem was a result of your program error, of not keeping a reference to 
Tk(), combined with tkinter's _default_root 'feature'.

The solution you report in your answer, 'root = tkinter.Tk()', later followed 
by an explicit 'root.destroy()' is *the* correct way to do what you want.  I 
explained further in my answer.

There is no way for askopenfilename to know that you are done with root or 
tkinter._default_root.

--
assignee: terry.reedy -> 
components:  -IDLE, Windows
nosy: +serhiy.storchaka
resolution:  -> not a bug
stage:  -> resolved
status: open -> closed
versions: +Python 3.7 -Python 3.5

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[issue30581] os.cpu_count() returns wrong number of processors on system with > 64 logical processors

[STINNER Victor]

STINNER Victor added the comment:

I reopen the issue to backport the bugfix to 3.6.

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[issue31292] `python setup.py check --restructuredtext` fails when a include directive is present.

[flying sheep]

Changes by flying sheep :


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[issue31308] forkserver process isn't re-launched if it died

[Antoine Pitrou]

Changes by Antoine Pitrou :


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[issue31310] semaphore tracker isn't protected against crashes

[Antoine Pitrou]

Changes by Antoine Pitrou :


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[issue31311] SystemError raised by PyCData_setstate() in case __dict__ is not a dict

[Oren Milman]

New submission from Oren Milman:

The following code causes PyCData_setstate() (in Modules/_ctypes/_ctypes.c) to
raise a SystemError:

import ctypes
class BadStruct(ctypes.Structure):
def __dict__(self):
pass

BadStruct().__setstate__({}, b'foo')

this is because PyCData_setstate() assumes that the __dict__ attribute is a 
dict.


while we are here, I wonder whether we should change the format given to 
PyArg_ParseTuple() to "!Os#", so that the following would raise a TypeError:

import ctypes
class MyStruct(ctypes.Structure):
pass

MyStruct().__setstate__(42, b'foo')

AttributeError: 'int' object has no attribute 'keys'


what do you think?

--
components: Extension Modules
messages: 301034
nosy: Oren Milman
priority: normal
severity: normal
status: open
title: SystemError raised by PyCData_setstate() in case __dict__ is not a dict
type: behavior
versions: Python 3.7

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[issue31311] SystemError raised by PyCData_setstate() in case __dict__ is not a dict

[Oren Milman]

Oren Milman added the comment:

typo - change the format to "O!s#"

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[issue31311] SystemError raised by PyCData_setstate() in case __dict__ is not a dict

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

And the following example results in segmentation fault.

import ctypes
class BadStruct(ctypes.Structure):
@property
def __dict__(self):
raise AttributeError

BadStruct().__setstate__({}, b'')

As for change the format given to PyArg_ParseTuple(), I think it can be done 
only in master. It is better to make a separate PR for this.

--
nosy: +serhiy.storchaka
type: behavior -> crash

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[issue28287] Refactor subprocess.Popen to let a subclass handle IO asynchronously

[Gregory P. Smith]

Changes by Gregory P. Smith :


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[issue26175] Fully implement IOBase abstract on SpooledTemporaryFile

[Roundup Robot]

Changes by Roundup Robot :


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[issue30780] IDLE: configdialog - add tests for ConfigDialog GUI.

[Cheryl Sabella]

Cheryl Sabella added the comment:

I've started working on the missing tests for HighPage and KeysPage and also 
test for the functions and buttons in ConfigDialog.  That led to PR3238 because 
the 'help' button wasn't working.

Anyway, I found the following on 
http://effbot.org/tkinterbook/tkinter-events-and-bindings.htm:

"An easier solution is to prevent Tkinter from propagating the event to other 
handlers; just return the string “break” from your event handler:

def ignore(event):
return "break"
text.bind("", ignore)
or

text.bind("", lambda e: "break")"

So, it seems that the 'Double-Button-1' and 'B1-Motion' bindings are to prevent 
those events from propagating outside of the widget.  Although, I didn't notice 
a difference when I commented them out, so maybe they don't have a higher level 
binding.

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[issue30096] Update examples in abc documentation to use abc.ABC

[Éric Araujo]

Éric Araujo added the comment:


New changeset 122e88a8354e3f75aeaf6211232dac88ac296d54 by Éric Araujo (Eric 
Appelt) in branch 'master':
bpo-30096: Use ABC in abc reference examples (#1220)
https://github.com/python/cpython/commit/122e88a8354e3f75aeaf6211232dac88ac296d54


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[issue30096] Update examples in abc documentation to use abc.ABC

[Éric Araujo]

Éric Araujo added the comment:

Thanks for the patch!  Raymond approved it and I merged it after a minor 
change.  Now let me read the doc again about backports :)

--
stage: needs patch -> backport needed
versions: +Python 3.6

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[issue24900] Raising an exception that cannot be unpickled causes hang in ProcessPoolExecutor

[Antoine Pitrou]

Changes by Antoine Pitrou :


--
pull_requests:  -3277

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