[issue27141] Fix collections.UserList shallow copy

[Bar Harel]

Bar Harel  added the comment:

Alrighty then, opt1 passed all tests and waiting on GitHub for inclusion :-)

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[issue31667] Wrong links in the gettext.NullTranslations class

[Serhiy Storchaka]

Change by Serhiy Storchaka :


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[issue31834] BLAKE2: the (pure) SSE2 impl forced on x86_64 is slower than reference

[Christian Heimes]

Christian Heimes  added the comment:

I'm pretty sure that your PR has disabled all SSE optimizations. AFAIK gcc does 
not enable SSE3 and SSE4 on X86_64 by default.

$ gcc -dM -E - < /dev/null | grep SSE
#define __SSE2_MATH__ 1
#define __SSE_MATH__ 1
#define __SSE2__ 1
#define __SSE__ 1

You have to set a compiler flag like -msse4

$ gcc -msse4 -dM -E - < /dev/null | grep SSE
#define __SSE4_1__ 1
#define __SSE4_2__ 1
#define __SSE2_MATH__ 1
#define __SSE_MATH__ 1
#define __SSE2__ 1
#define __SSSE3__ 1
#define __SSE__ 1
#define __SSE3__ 1

--
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stage: resolved -> 
status: closed -> open

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[issue21720] "TypeError: Item in ``from list'' not a string" message

[Ben Finney]

Ben Finney  added the comment:

On 23-Oct-2017, Serhiy Storchaka wrote:
> Is it all with this issue?

I accept Nick's reasoning:

> As a general principle, we don't give value information in type
> errors, since the error is structural rather than value based.

as sufficient to reject my requested improvement to the message.

The change in https://hg.python.org/cpython/rev/7dd0910e8fbf> is
good enough, IMO.

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[issue31667] Wrong links in the gettext.NullTranslations class

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:


New changeset ef346a2473376c888ff160db9623eaa9871db2ac by Serhiy Storchaka in 
branch '2.7':
[2.7] bpo-31667: Fix gettext related links. (GH-3860) (#4100)
https://github.com/python/cpython/commit/ef346a2473376c888ff160db9623eaa9871db2ac


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[issue31667] Wrong links in the gettext.NullTranslations class

[Serhiy Storchaka]

Change by Serhiy Storchaka :


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[issue21720] "TypeError: Item in ``from list'' not a string" message

[Serhiy Storchaka]

Change by Serhiy Storchaka :


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[issue31834] BLAKE2: the (pure) SSE2 impl forced on x86_64 is slower than reference

[STINNER Victor]

STINNER Victor  added the comment:

> AFAIK gcc does not enable SSE3 and SSE4 on X86_64 by default.

Linux now supports multiple variants of the same function, one variant per CPU 
type, the binding is done when a library is loaded. But I don't know how to 
implement that :-(

There is target_clones("sse4.1,avx") the function attribute in GCC for example. 
It compiles a function twice, once for generic CPU, once for SSE4.1.

See also ifunc: "indirect function", "CPU dispatch" or "function resolver".

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[issue31810] Travis CI, buildbots: run "make smelly" to check if CPython leaks symbols

[STINNER Victor]

STINNER Victor  added the comment:


New changeset 87d332dcdbffe8ff60d99f74b1ad241c0967b055 by Victor Stinner in 
branch 'master':
bpo-31810: Add smelly.py to check exported symbols (#4057)
https://github.com/python/cpython/commit/87d332dcdbffe8ff60d99f74b1ad241c0967b055


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[issue27987] obmalloc's 8-byte alignment causes undefined behavior

[Antoine Pitrou]

Antoine Pitrou  added the comment:

What do we do if at some point a C type requires a larger alignment (for 
example a vector type readable using AVX512 instructions)?

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[issue14465] xml.etree.ElementTree: add feature to prettify XML output

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

My thoughts:

1. Whitespaces are significant in XML. Pretty-printed XML is different from the 
original XML to an XML parser. For some applications some whitespaces around 
tags are not significant. But this depends on the application and in different 
parts of the document whitespaces can have different meaning. For example the 
document can contain a metadata with insignificant whitespaces and marked up 
text with significant whitespaces. There is a special attribute named xml:space 
that can signal the meaning of whitespaces for the part of a document.

https://www.w3.org/TR/xml/#sec-white-space

2. In HTML whitespaces around  are insignificant, but whitespaces around  
are significant. Whitespaces inside ... are significant.

3. If strip whitespaces around tags and insert newlines and indentations, 
shouldn't we strip whitespaces inside the text context? Or preserve newlines 
but update indentations?

4. If modify whitespaces on output, it may be worth to add an option to ignore 
insignificant whitespaces on input.

5. Serialization of ElementTree in the stdlib is much slower than in lxml (see 
issue25881). Perhaps it should be implemented in C. But it should be kept 
simple for this. Pretty-printing can be implemented as an outher preprocessing 
operation (for example the original Eli's code indents the tree in-place: 
http://effbot.org/zone/element-lib.htm#prettyprint) or as a proxy that indents 
elements on-fly.

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[issue27987] obmalloc's 8-byte alignment causes undefined behavior

[STINNER Victor]

STINNER Victor  added the comment:

> ubsan complains about unaligned access when structs include "long double". An 
> example error:
> runtime error: member access within misaligned address 0x7f77dbba9798 for 
> type 'struct CDataObject', which requires 16 byte alignment

Can we use memcpy() to prevent such issue?

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[issue31106] os.posix_fallocate() generate exception with errno 0

[Roundup Robot]

Change by Roundup Robot :


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[issue31827] Remove os.stat_float_times()

[STINNER Victor]

STINNER Victor  added the comment:


New changeset 01b5aab7bfb11ee5476ef52d24495598cbe7c99a by Victor Stinner in 
branch 'master':
bpo-31827: Remove os.stat_float_times() (GH-4061)
https://github.com/python/cpython/commit/01b5aab7bfb11ee5476ef52d24495598cbe7c99a


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[issue31106] os.posix_fallocate() generate exception with errno 0

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

Марк, do you mind to add a NEWS entry?

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[issue31773] Rewrite _PyTime_GetWinPerfCounter() for _PyTime_t

[STINNER Victor]

STINNER Victor  added the comment:

Buildbots seem to be happy, I close the issue.

See my new PEP 564 for the next chapiter of this story ;-)

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[issue18835] Add aligned memory variants to the suite of PyMem functions/macros

[Stefan Krah]

Stefan Krah  added the comment:

[me]
> This weakens my use case somewhat [...]

I looked at Victor's patch, and thanks to the alignment <= ALIGNMENT
optimization it seems that always using the aligned_alloc() and
aligned_free() versions for a specific pointer is fast. Nice!

So I retract the weakening of my use case (still shame on Microsoft
for not implementing C11). :)

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[issue31731] [2.7] test_io hangs on x86 Gentoo Refleaks 2.7

[STINNER Victor]

STINNER Victor  added the comment:

test_io was blocked a second time:

http://buildbot.python.org/all/#/builders/78/builds/3

running: test_io (68517 sec)
running: test_io (68547 sec)
running: test_io (68577 sec)
command interrupted, attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=69935.628661

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[issue31810] Travis CI, buildbots: run "make smelly" to check if CPython leaks symbols

[STINNER Victor]

STINNER Victor  added the comment:

"make smelly" is now run on Travis CI.

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[issue31827] Remove os.stat_float_times()

[STINNER Victor]

STINNER Victor  added the comment:

Copy of my comment on the PR: "So, I tried to remove the backward compatibility 
layer: I modified stat_result[ST_MTIME] to return float rather than int. 
Problem: it broke test_logging, the code deciding if a log file should be 
rotated or not.

While I'm not strongly opposed to modify stat_result[ST_MTIME], I prefer to do 
it in a separated PR. Moreover, we need maybe to emit a DeprecationWarning, or 
at least deprecate the feature in the doc, before changing the type, no?"

Serhiy's answer: "I agree, it should be done in a separate issue. It needs a 
special discussion. And maybe this can't be changed."

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[issue31827] Remove os.stat_float_times()

[STINNER Victor]

STINNER Victor  added the comment:

os.stat_float_times() has been removed, I close the issue.

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[issue31812] Document PEP 545 (documentation translation) in What's New in Python 3.7

[STINNER Victor]

STINNER Victor  added the comment:


New changeset 809d173c2005ed76f5b6cb178a0cce3f88121883 by Victor Stinner 
(Julien Palard) in branch 'master':
bpo-31812: Add documentation translations to What's New in Python 3.7. (GH-4064)
https://github.com/python/cpython/commit/809d173c2005ed76f5b6cb178a0cce3f88121883


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[issue23699] Add a macro to ease writing rich comparisons

[Petr Viktorin]

Petr Viktorin  added the comment:

Both tp_richcompare and PyObject_RichCompareBool have op as the last argument:

https://docs.python.org/3/c-api/object.html#c.PyObject_RichCompareBool
https://docs.python.org/3/c-api/typeobj.html?highlight=tp_richcompare#c.PyTypeObject.tp_richcompare

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[issue31803] time.clock() should emit a DeprecationWarning

[STINNER Victor]

STINNER Victor  added the comment:

Marc-Andre Lemburg: "Thanks for pointing that out. I didn't know."

Do you still think that we need to modify time.clock() rather than deprecating 
it?

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[issue31674] Buildbots: random "Failed to connect to github.com port 443: Connection timed out" errors

[STINNER Victor]

STINNER Victor  added the comment:

I didn't see the failure recently, I close the issue.

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[issue31812] Document PEP 545 (documentation translation) in What's New in Python 3.7

[STINNER Victor]

Change by STINNER Victor :


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[issue31430] [Windows][2.7] Python 2.7 compilation fails on mt.exe crashing with error code C0000005

[STINNER Victor]

STINNER Victor  added the comment:

Any update on this bug?

The "AMD64 Windows10 2.7" buildbot is still broken:
http://buildbot.python.org/all/#/builders/96

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[issue31227] regrtest: reseed random with the same seed before running a test file

[STINNER Victor]

STINNER Victor  added the comment:

I didn't get a strong +1 on the issue and I'm not convinced myself by my 
approach. Moreover, Refleaks buildbots now seem to be reliable thanks to other 
fixes. For all these reasons, I close the issue.

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[issue31227] regrtest: reseed random with the same seed before running a test file

[STINNER Victor]

Change by STINNER Victor :


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[issue31174] test_tools leaks randomly references on x86 Gentoo Refleaks 3.6 and 3.x

[STINNER Victor]

STINNER Victor  added the comment:

"test_tools leaked (...)" still occurs randomly on 3.6 and 3.x Gentoo buildbot.

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[issue31174] test_tools leaks randomly references on x86 Gentoo Refleaks 3.6 and 3.x

[STINNER Victor]

Change by STINNER Victor :


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[issue31174] test_tools leaks randomly references on x86 Gentoo Refleaks 3.6 and 3.x

[STINNER Victor]

STINNER Victor  added the comment:

My previous attempt, PR 3059, was a a very generic fix, but my bpo-31227 idea 
was rejected.

I proposed a new idea, PR 4102, which is restricted to this specific issue:
"test_unparse.DirectoryTestCase now stores the names sample to always
test the same files. It prevents false alarms when hunting reference
leaks."

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[issue28281] Remove year limits from calendar

[Cheryl Sabella]

Cheryl Sabella  added the comment:

Hello Mark, 

Would you be able to prepare a pull request on GitHub for your patch?

Thanks!

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[issue30768] PyThread_acquire_lock_timed() should recompute the timeout when interrupted by a signal

[STINNER Victor]

STINNER Victor  added the comment:

interrupted_lock.py: test threading.Lock.acquire(timeout=1.0) with SIGALRM sent 
every 1 ms (so up to 1000 times in total). Example:

haypo@selma$ ./python interrupted_lock.py 
acquire(timeout=1.0) took 1.0 seconds and got 1000 signals

Oh, in fact, threading.Lock.acquire(timeout=1.0) already recomputes the timeout 
when interrupted.

In Python stdlib, PyThread_acquire_lock_timed() is only called from one place 
with intr_flag=0: faulthandler watchdog thread, but this thread blocks all 
signals:

/* we don't want to receive any signal */
sigfillset(&set);
pthread_sigmask(SIG_SETMASK, &set, NULL);

--
Added file: https://bugs.python.org/file47233/interrupted_lock.py

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[issue30768] PyThread_acquire_lock_timed() should recompute the timeout when interrupted by a signal

[STINNER Victor]

STINNER Victor  added the comment:

Ah, I found another caller of PyThread_acquire_lock_timed() with a timeout > 0 
and intr_flag=0: _enter_buffered_busy() of Modules/_io/bufferedio.c:

/* When finalizing, we don't want a deadlock to happen with daemon
 * threads abruptly shut down while they owned the lock.
 * Therefore, only wait for a grace period (1 s.).
 * Note that non-daemon threads have already exited here, so this
 * shouldn't affect carefully written threaded I/O code.
 */
st = PyThread_acquire_lock_timed(self->lock, (PY_TIMEOUT_T)1e6, 0);

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[issue30768] PyThread_acquire_lock_timed() should recompute the timeout when interrupted by a signal

[STINNER Victor]

Change by STINNER Victor :


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[issue27645] Supporting native backup facility of SQLite

[Lele Gaifax]

Lele Gaifax  added the comment:

Reasonable and quite simple to implement: done in commit 
https://github.com/lelit/cpython/commit/960303f9eb394e2ba91d10e5e674997a48811ac2

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[issue30768] PyThread_acquire_lock_timed() should recompute the timeout when interrupted by a signal

[STINNER Victor]

STINNER Victor  added the comment:

I wrote PR 4103 to fix the pthread+semaphore implementation of 
PyThread_acquire_lock_timed().

Apply PR 4103, apply attached test.patch, recompile Python, and run 
interrupted_lock.py to test the PR. Result:

haypo@selma$ ./python interrupted_lock.py 
acquire(timeout=1.0) took 1.0 seconds and got 911 signals

--
Added file: https://bugs.python.org/file47234/test.patch

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[issue30768] PyThread_acquire_lock_timed() should recompute the timeout when interrupted by a signal

[STINNER Victor]

STINNER Victor  added the comment:

To check if you are using pthread+semaphore, use:

haypo@selma$ ./python -c 'import sys; print(sys.thread_info)'
sys.thread_info(name='pthread', lock='semaphore', version='NPTL 2.25')

Here you have pthread+semaphore. It's Fedora 26 running Linux kernel 4.13.

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[issue31174] test_tools leaks randomly references on x86 Gentoo Refleaks 3.6 and 3.x

[STINNER Victor]

STINNER Victor  added the comment:


New changeset 8e482bea21cb942804234e36d3c6c896aabd32da by Victor Stinner in 
branch 'master':
bpo-31174: Fix test_tools.test_unparse (#4102)
https://github.com/python/cpython/commit/8e482bea21cb942804234e36d3c6c896aabd32da


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[issue31174] test_tools leaks randomly references on x86 Gentoo Refleaks 3.6 and 3.x

[Roundup Robot]

Change by Roundup Robot :


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[issue31174] test_tools leaks randomly references on x86 Gentoo Refleaks 3.6 and 3.x

[STINNER Victor]

STINNER Victor  added the comment:

Python 2.7 is not affected. Even if Python 2.7 has Demo/parser/test_unparse.py, 
this test is not part of the Python test suite, and it doesn't use 
random.sample(names, 10).

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[issue31845] PYTHONDONTWRITEBYTECODE and PYTHONOPTIMIZE have no effect

[Nick Coghlan]

Nick Coghlan  added the comment:

Huh, it appears the tests for these features are relying solely on the command 
line options, and not checking that the environment variables are also setting 
the flags properly. We should be able to account for that omission with a 
single new test in `test_cmd_line` that sets every relevant environment 
variable and checks for the expected `sys.flags` contents.

As far as what's actually going wrong goes, it's this sequence of events in 
Py_Main:

_Py_InitializeCore(&core_config);
... other code ...
apply_command_line_and_environment(&cmdline);

_Py_InitializeCore is setting the internal flags appropriately based on the 
runtime environment, but then Py_Main is stomping over those environmental 
settings with the settings from the command line.

Historically, these operations happened the other way around, so it was solely 
up to the code reading the environment variables to ensure they played nice 
with each other. Now the command line processing logic needs to be updated to 
also ensure that it only ever increases these values and never reduces them.

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[issue31174] test_tools leaks randomly references on x86 Gentoo Refleaks 3.6 and 3.x

[STINNER Victor]

STINNER Victor  added the comment:


New changeset d8f78a1fbc0a34224289d436ad67f608fa553f0c by Victor Stinner (Miss 
Islington (bot)) in branch '3.6':
bpo-31174: Fix test_tools.test_unparse (GH-4102) (#4104)
https://github.com/python/cpython/commit/d8f78a1fbc0a34224289d436ad67f608fa553f0c


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[issue31174] test_tools leaks randomly references on x86 Gentoo Refleaks 3.6 and 3.x

[STINNER Victor]

STINNER Victor  added the comment:

The bug should now be fixed.

--
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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[issue31845] PYTHONDONTWRITEBYTECODE and PYTHONOPTIMIZE have no effect

[Nick Coghlan]

Change by Nick Coghlan :


--
assignee:  -> ncoghlan

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[issue31845] PYTHONDONTWRITEBYTECODE and PYTHONOPTIMIZE have no effect

[Nick Coghlan]

Change by Nick Coghlan :


--
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pull_requests: +4075
stage:  -> patch review

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[issue31859] sharedctypes.RawArray initialization

[Tim]

New submission from Tim :

In the initialization of a new `RawArray` the `size_or_initializer` parameter 
is tested for being an instance of `int`. When passing something like 
numpy.int64 here, the code crashes, because it does not recognize this as an 
integer. The workaround is to cast to int(). Wouldn't it be nicer to compare to 
types.IntType to allow for custom integer types?

def RawArray(typecode_or_type, size_or_initializer):
'''
Returns a ctypes array allocated from shared memory
'''
type_ = typecode_to_type.get(typecode_or_type, typecode_or_type)
-if isinstance(size_or_initializer, int):
+if size_or_initializer is IntType:

--
messages: 304902
nosy: meetaig
priority: normal
severity: normal
status: open
title: sharedctypes.RawArray initialization
type: behavior
versions: Python 3.5, Python 3.6

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[issue30639] inspect.getfile(obj) calls object repr on failure

[Yury Selivanov]

Yury Selivanov  added the comment:


New changeset e968bc735794a7123f28f26d68fdf5dc8c845280 by Yury Selivanov 
(Thomas Kluyver) in branch 'master':
bpo-30639: Lazily compute repr for error (#2132)
https://github.com/python/cpython/commit/e968bc735794a7123f28f26d68fdf5dc8c845280


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

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

Seems Raymond have changed his mind about using Argument Clinic in itertools 
(msg302908). Tal, do you mind to update your itertools patch and create a pull 
request?

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[issue30639] inspect.getfile(obj) calls object repr on failure

[Yury Selivanov]

Yury Selivanov  added the comment:

Thank you, Thomas.

--
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stage:  -> resolved
status: open -> closed

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[issue20182] Derby #13: Convert 50 sites to Argument Clinic across 5 files

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

Tail, do you mind to update your patches and create pull requests?

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[issue20182] Derby #13: Convert 50 sites to Argument Clinic across 5 files

[Serhiy Storchaka]

Change by Serhiy Storchaka :


--
Removed message: https://bugs.python.org/msg304906

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[issue20182] Derby #13: Convert 50 sites to Argument Clinic across 5 files

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

Tal, do you mind to update your patches and create pull requests?

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[issue31585] Refactor the enumerate.__next__ implementation

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

Added a patch for history.

--
Added file: https://bugs.python.org/file47235/enum_next.diff

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[issue31860] IDLE: Make font sample editable

[Serhiy Storchaka]

New submission from Serhiy Storchaka :

The proposed patch makes the font sample in IDLE font configuration dialog 
editable. This allows users to test fonts with arbitrary samples.

--
assignee: terry.reedy
components: IDLE
messages: 304909
nosy: serhiy.storchaka, terry.reedy
priority: normal
severity: normal
status: open
title: IDLE: Make font sample editable
type: enhancement
versions: Python 3.6, Python 3.7

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[issue31860] IDLE: Make font sample editable

[Serhiy Storchaka]

Change by Serhiy Storchaka :


--
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pull_requests: +4076
stage:  -> patch review

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[issue31861] aiter() and anext() built-in functions

[Davide Rizzo]

New submission from Davide Rizzo :

PEP 525 suggested that adding aiter() and anext() would need to wait until 
async __aiter__ is dropped in 3.7. Issue 31709 solved that, so now it would be 
possible to add them.

--
components: Library (Lib)
messages: 304910
nosy: davide.rizzo
priority: normal
severity: normal
status: open
title: aiter() and anext() built-in functions
versions: Python 3.7

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[issue30817] Abort in PyErr_PrintEx() when no memory

[Xavier de Gaye]

Change by Xavier de Gaye :


--
pull_requests: +4077

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[issue31430] [Windows][2.7] Python 2.7 compilation fails on mt.exe crashing with error code C0000005

[Zachary Ware]

Change by Zachary Ware :


--
nosy: +db3l

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[issue31834] BLAKE2: the (pure) SSE2 impl forced on x86_64 is slower than reference

[Benjamin Peterson]

Benjamin Peterson  added the comment:

On Tue, Oct 24, 2017, at 00:25, Christian Heimes wrote:
> 
> Christian Heimes  added the comment:
> 
> I'm pretty sure that your PR has disabled all SSE optimizations. AFAIK
> gcc does not enable SSE3 and SSE4 on X86_64 by default.
> 
> $ gcc -dM -E - < /dev/null | grep SSE
> #define __SSE2_MATH__ 1
> #define __SSE_MATH__ 1
> #define __SSE2__ 1
> #define __SSE__ 1

Before this patch, this would cause blake2b.c to use slow SSE2 only
instruction, though, right?

It seems to me this represents an improvement or the status quo in all
cases. With no extra GCC flags, the reference implementation is used
rather than a slow SSE2 implementation. If extra -m flags are in CFLAGS,
the fastest implementation for the target is used.

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[issue27987] obmalloc's 8-byte alignment causes undefined behavior

[Benjamin Peterson]

Benjamin Peterson  added the comment:

My suggestion would be to pass alignof(type) into the allocator via macro. Then 
the allocator could at least assert it's providing good enough alignment if not 
provide the correct alignment.

I believe 16-byte alignment is special because it's glibc's malloc's default. 
So "normal" code shouldn't really be expecting anything better than 16-byte 
alignment. Code with higher alignment requirements will have to use APIs like 
the one proposed in #18835.

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[issue30817] Abort in PyErr_PrintEx() when no memory

[Xavier de Gaye]

Xavier de Gaye  added the comment:


New changeset d5d79545b73110b2f4c2b66d150409514e2ca8e0 by xdegaye in branch 
'3.6':
[3.6] bpo-30817: Fix PyErr_PrintEx() when no memory (GH-2526). (#4107)
https://github.com/python/cpython/commit/d5d79545b73110b2f4c2b66d150409514e2ca8e0


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[issue30817] Abort in PyErr_PrintEx() when no memory

[Xavier de Gaye]

Change by Xavier de Gaye :


--
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status: open -> closed

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[issue31862] Port the standard library to PEP 489 multiphase initialization

[Marcel Plch]

New submission from Marcel Plch :

PEP 489 introduced multiphase initialization of extension and built-in modules.
Now, almost no module in the standard library supports this feature. This 
should be improved to prepare Python for better testing of subinterpreters.

Many benefits of PEP 489 don't apply to stdlib modules. However, the PEP 
effectively says that by using multi-phase init, the module author "promises" 
that the module is "subinterpreter-friendly" [0]. So, when porting, each module 
should be checked that it e.g. doesn't use mutable process-global state.

I'd like to port stdlib to multi-phase init, starting with the easier modules, 
to:
- get familiar with contributing to CPython,
- check and track which modules are already "subinterpreter-friendly", and
- figure out how and where PEP 489 is lacking (beyond what is discussed in 
the PEP itself).


[0]: 
https://www.python.org/dev/peps/pep-0489/#subinterpreters-and-interpreter-reloading

--
components: Extension Modules
messages: 304914
nosy: Dormouse759, encukou, ncoghlan
priority: normal
severity: normal
status: open
title: Port the standard library to PEP 489 multiphase initialization
type: enhancement
versions: Python 3.7

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[issue28936] test_global_err_then_warn in test_syntax is no longer valid

[Guido van Rossum]

Guido van Rossum  added the comment:

I think this is very minor but if you two can agree that the code is right I 
think it's a nice little improvement, and I like that that particular test's 
usefulness is restored.


PS. Long-term we should really build error recovery into our antiquated parser 
and report as many errors as we can, without cascading. But that's probably a 
Python 4 project.

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[issue31862] Port the standard library to PEP 489 multiphase initialization

[Petr Viktorin]

Petr Viktorin  added the comment:

FWIW, Marcel is an intern in my team, tasked to learn CPython internals by 
trying to improve subinterpreter support. If I don't comment on his issues it's 
because we discussed privately beforehand.

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[issue27987] obmalloc's 8-byte alignment causes undefined behavior

[Antoine Pitrou]

Antoine Pitrou  added the comment:

> My suggestion would be to pass alignof(type) into the allocator via macro.

Do you mean using some new PyMem_ function?  Or as as new tp_ field on the type 
declaration?

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[issue27987] obmalloc's 8-byte alignment causes undefined behavior

[Antoine Pitrou]

Change by Antoine Pitrou :


--
versions:  -Python 2.7, Python 3.3, Python 3.4, Python 3.5, Python 3.6

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[issue31862] Port the standard library to PEP 489 multiphase initialization

[Marcel Plch]

Change by Marcel Plch :


--
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pull_requests: +4078
stage:  -> patch review

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[issue27987] obmalloc's 8-byte alignment causes undefined behavior

[STINNER Victor]

STINNER Victor  added the comment:

What matters when a Python object is allocated? The start of the PyObject 
structure, or the start of the PyGC_Head structure? Would it be possible to 
align the PyObject start?

The simplest option is to store data which needs to be aligned in a second 
memory block allocated by PyMem_AlignedAlloc().

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[issue27987] obmalloc's 8-byte alignment causes undefined behavior

[STINNER Victor]

STINNER Victor  added the comment:

Change by Antoine Pitrou: "versions:  -Python 2.7, Python 3.3, Python 3.4, 
Python 3.5, Python 3.6"

The undefined behaviour exists and should be fixed in Python 2.7 and 3.6, no? 
Can we use memcpy()?

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[issue31863] Inconsistent returncode/exitcode for terminated child processes on Windows

[Akos Kiss]

New submission from Akos Kiss :

I've been working with various approaches for running and terminating 
subprocesses on Windows and I've obtained surprisingly different results if I 
used different modules and ways of termination. Here is the script I wrote, it 
uses the `subprocess` and the `multiprocessing` modules for starting new 
subprocesses, and process termination is performed either by the modules' own 
`terminate` functions or by `os.kill`.

```py
import multiprocessing
import os
import signal
import subprocess
import sys
import time

def kill_with_os_kill(proc):
print('kill with os.kill(pid,SIGTERM)')
os.kill(proc.pid, signal.SIGTERM)

def kill_with_terminate(proc):
print('kill child with proc.terminate()')
proc.terminate()

def run_and_kill_subprocess(killfn, procarg):
print('run subprocess child with %s' % procarg)
with subprocess.Popen([sys.executable, __file__, procarg]) as proc:
time.sleep(1)
killfn(proc)
proc.wait()
print('child terminated with %s' % proc.returncode)

def run_and_kill_multiprocessing(killfn, procarg):
print('run multiprocessing child with %s' % procarg)
proc = multiprocessing.Process(target=childmain, args=(procarg,))
proc.start()
time.sleep(1)
killfn(proc)
proc.join()
print('child terminated with %s' % proc.exitcode)

def childmain(arg):
print('child process started with %s' % arg)
while True:
pass

if __name__ == '__main__':
if len(sys.argv) < 2:
print('parent process started')
run_and_kill_subprocess(kill_with_os_kill, 'subprocess-oskill')
run_and_kill_subprocess(kill_with_terminate, 'subprocess-terminate')
run_and_kill_multiprocessing(kill_with_os_kill, 
'multiprocessing-oskill')
run_and_kill_multiprocessing(kill_with_terminate, 
'multiprocessing-terminate')
else:
childmain(sys.argv[1])
```

On macOS, everything works as expected (and I think that Linux will behave 
alike):

```
$ python3 killtest.py 
parent process started
run subprocess child with subprocess-oskill
child process started with subprocess-oskill
kill with os.kill(pid,SIGTERM)
child terminated with -15
run subprocess child with subprocess-terminate
child process started with subprocess-terminate
kill child with proc.terminate()
child terminated with -15
run multiprocessing child with multiprocessing-oskill
child process started with multiprocessing-oskill
kill with os.kill(pid,SIGTERM)
child terminated with -15
run multiprocessing child with multiprocessing-terminate
child process started with multiprocessing-terminate
kill child with proc.terminate()
child terminated with -15
```

But on Windows, I got:

```
>py -3 killtest.py
parent process started
run subprocess child with subprocess-oskill
child process started with subprocess-oskill
kill with os.kill(pid,SIGTERM)
child terminated with 15
run subprocess child with subprocess-terminate
child process started with subprocess-terminate
kill child with proc.terminate()
child terminated with 1
run multiprocessing child with multiprocessing-oskill
child process started with multiprocessing-oskill
kill with os.kill(pid,SIGTERM)
child terminated with 15
run multiprocessing child with multiprocessing-terminate
child process started with multiprocessing-terminate
kill child with proc.terminate()
child terminated with -15
```

Notes:
- On Windows with `os.kill(pid, sig)`, "sig will cause the process to be 
unconditionally killed by the TerminateProcess API, and the exit code will be 
set to sig." I.e., it is not possible to detect on Windows whether a process 
was terminated by a signal or it exited properly, because `kill` does not 
actually raise a signal and no Windows API allows to differentiate between 
proper or forced termination.
- The `multiprocessing` module has a workaround for this by terminating the 
process with a designated exit code (`TERMINATE = 0x1`) and checking for 
that value afterwards, rewriting it to `-SIGTERM` if found. The related 
documentation is a bit misleading, as `exitcode` is meant to have "negative 
value -N [which] indicates that the child was terminated by signal N" -- 
however, if the process was indeed killed with `SIGTERM` (and not via 
`terminate`), then `exitcode` will be `SIGTERM` and not `-SIGTERM` (see above). 
(The documentation of `terminate` does not clarify the situation much by 
stating that "on Windows TerminateProcess() is used", since it does not mention 
the special exit code -- and well, it's not even a signal after all, so it's 
not obvious whether negative or positive exit code is to be expected.)
- The `subprocess` module choses the quite arbitrary exit code of 1 and 
documents that "negative value -N indicates that the child was terminated by 
signal N" is POSIX only, not mentioning anything about what to expect on 
Windows.

Long story short: on Windows, the observable exit code of a forcibly terminated 
child process is quite inconsistent even acros

[issue31299] Add "ignore_modules" option to TracebackException.format()

[Dmitry Kazakov]

Dmitry Kazakov  added the comment:

Ping. (this issue needs a decision on ignore_modules vs filter callback, and/or 
patch review)

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[issue27987] obmalloc's 8-byte alignment causes undefined behavior

[Antoine Pitrou]

Antoine Pitrou  added the comment:

> Can we use memcpy()?

Hmm, perhaps.  Do you want to try it out (and measure any performance 
degradation)?

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[issue31861] aiter() and anext() built-in functions

[Davide Rizzo]

Change by Davide Rizzo :


--
nosy: +gvanrossum, yselivanov

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[issue31861] aiter() and anext() built-in functions

[Yury Selivanov]

Yury Selivanov  added the comment:

Guido, do we need a PEP to add aiter() and anext() builtins?

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[issue31861] aiter() and anext() built-in functions

[Guido van Rossum]

Guido van Rossum  added the comment:

> do we need a PEP to add aiter() and anext() builtins?

No, just this tracker issue, a PR and a reviewer. (Sorry, I can't review
CPython code myself any more.)

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[issue27987] obmalloc's 8-byte alignment causes undefined behavior

[Stefan Krah]

Stefan Krah  added the comment:

Since we have "#define PYMEM_FUNCS PYOBJ_FUNCS", I think extensions that
use PyMem_Malloc() also won't get the glibc max_align_t alignment.

But guess technically they should.

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[issue31861] aiter() and anext() built-in functions

[Yury Selivanov]

Yury Selivanov  added the comment:

> No, just this tracker issue, a PR and a reviewer. (Sorry, I can't review
CPython code myself any more.)

Alright, I'll work on a PR after PEP 55x.

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[issue31664] Add support of new crypt methods

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:


New changeset eab3ff72ebe79416cc032b8508ae13332955a157 by Serhiy Storchaka in 
branch 'master':
bpo-31664: Add support for the Blowfish method in crypt. (#3854)
https://github.com/python/cpython/commit/eab3ff72ebe79416cc032b8508ae13332955a157


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[issue31664] Add support of new crypt methods

[Serhiy Storchaka]

Change by Serhiy Storchaka :


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[issue14518] Add bcrypt $2a$ to crypt.py

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

The support of the Blowfish hashing (prefix '$2a$') has been added in 
issue31664.

--
nosy: +serhiy.storchaka
resolution:  -> out of date
stage: needs patch -> resolved
status: pending -> closed
superseder:  -> Add support of new crypt methods

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[issue25287] test_crypt fails on OpenBSD

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

issue31664 fixes test_crypt in 3.7. In other versions the test should be just 
skipped on OpenBSD. Blowfish is the only method supported on OpenBSD, but it 
was not supported by the Python's crypt module.

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[issue28292] Make Calendar.itermonthdates() behave consistently in edge cases

[Alexander Belopolsky]

Alexander Belopolsky  added the comment:


New changeset fdd9b217c60b454ac6a82f02c8b0b551caeac88b by Alexander Belopolsky 
in branch 'master':
Closes bpo-28292: Implemented Calendar.itermonthdays3() and itermonthdays4(). 
(#4079)
https://github.com/python/cpython/commit/fdd9b217c60b454ac6a82f02c8b0b551caeac88b


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

[Tal Einat]

Tal Einat  added the comment:

Id be happy to update the itertools patch.

I haven't been following AC work for quite a while. I would expect this to 
entail:

1. applying the patch to the master branch
2. merging any conflicts
3. running the clinic.py script again
4. review the output and compare it to the previous output to make sure things 
look okay

Would you also prefer this in the form of a GitHub PR?

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[issue28281] Remove year limits from calendar

[Alexander Belopolsky]

Change by Alexander Belopolsky :


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[issue20182] Derby #13: Convert 50 sites to Argument Clinic across 5 files

[Tal Einat]

Tal Einat  added the comment:

I'd be happy to update the patches.

I asked for a bit of clarification on what this entails in msg304931 on issue 
#20180, once that's clear I'll do the same for these patches and create PRs.

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[issue28281] Remove year limits from calendar

[Alexander Belopolsky]

Alexander Belopolsky  added the comment:

I submitted Mark's patch unchanged as PR 4109.  If we don't hear from Mark, I 
will address my own comments and merge.

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[issue31702] Allow to specify the number of rounds for SHA-* hashing in crypt

[Serhiy Storchaka]

Change by Serhiy Storchaka :


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[issue9305] Don't use east/west of UTC in date/time documentation

[Cheryl Sabella]

Cheryl Sabella  added the comment:

Would one of the original authors of the patches like to create a GitHub pull 
request for this issue?

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nosy: +csabella

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

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

All correct. The final patch should be in the form of GitHub PR.

Don't specify the self parameter explicitly, just rename the corresponding 
variable. The rest of the patch LGTM.

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

[Tal Einat]

Tal Einat  added the comment:

What about islice? Does AC now support complex enough signatures to support it? 
If not, should I leave the comment as is?

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[issue25287] test_crypt fails on OpenBSD

[Serhiy Storchaka]

Change by Serhiy Storchaka :


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

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

Keep islice() non-converted. For the r parameter of permutations() use "r: 
object = None".

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[issue25287] test_crypt fails on OpenBSD

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:


New changeset f52dff611cff2fb9e90340b4787eda50ab2d40c6 by Serhiy Storchaka in 
branch '3.6':
bpo-25287: Backport new tests for crypt and skip test_crypt on OpenBSD. (#4111)
https://github.com/python/cpython/commit/f52dff611cff2fb9e90340b4787eda50ab2d40c6


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[issue25287] test_crypt fails on OpenBSD

[Serhiy Storchaka]

Change by Serhiy Storchaka :


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[issue31690] Make RE "a", "L" and "u" inline flags local

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:


New changeset 3557b05c5a7dfd7d97ddfd3b79aefd53d25e5132 by Serhiy Storchaka in 
branch 'master':
bpo-31690: Allow the inline flags "a", "L", and "u" to be used as group flags 
for RE. (#3885)
https://github.com/python/cpython/commit/3557b05c5a7dfd7d97ddfd3b79aefd53d25e5132


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[issue31690] Make RE "a", "L" and "u" inline flags local

[Serhiy Storchaka]

Change by Serhiy Storchaka :


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[issue25287] test_crypt fails on OpenBSD

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:


New changeset 04c0a4038e8764f742de8505600b8ee97ee50776 by Serhiy Storchaka in 
branch '2.7':
[2.7] bpo-25287: Backport new tests for crypt and skip test_crypt on OpenBSD. 
(GH-4111). (#4112)
https://github.com/python/cpython/commit/04c0a4038e8764f742de8505600b8ee97ee50776


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