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Gregory P. Smith added the comment:
A workaround should be pass bufsize=0.
There might be performance consequences. That depends on your read patterns
and child process.
If this is to be supported and fixed, the selectors used in POpen._communicate
on the POSIX side presumably don't
Gregory P. Smith added the comment:
Thanks for the analysis Eryk! I think you are right, changing the default to
match the behavior that people have actually been experiencing on `os.link(src,
dst)` makes sense.
Possible suggestion:
We can go one step further if anyone believes
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New submission from Gregory P. Smith :
See https://lemire.me/blog/2020/03/10/fast-float-parsing-in-practice/ for
inspiration and a reference (possibly a library to use, but if not the
techniques still apply).
Primarily usable when creating the float objects from the string data as is
common
Gregory P. Smith added the comment:
I probably I wrote these docs (a long time ago). The examples are being used
to demonstrate different uses of the APIs including calling update multiple
times, different algorithms, a binary digest and a hex digest.
They weren't mean to show
ions:
https://sourceforge.net/p/roundup/mailman/
About Roundup
=
Roundup is a simple-to-use and install issue-tracking system with
command-line, web and e-mail interfaces. It is based on the winning design
from Ka-Ping Yee in the Software Carpentry "Track" desig
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Gregory P. Smith added the comment:
Yes this should become part of --with-optimizations when building on a platform
using a compiler that (a) supports it and (b) where it matters.
If this is only relevant on --enable-shared builds (not the default), i'd
assume also make it conditional
Gregory P. Smith added the comment:
and to echo others: Do not worry about LD_PRELOAD users trying to override
internals. That is not a supported use case. It is always a hack. anyone
using it knows this.
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Ravi Teja P added the comment:
Hi
My CLA has been approved. Can someone review the PR.
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Pytho
Gregory P. Smith added the comment:
No objections, it would be great to see this finished up and land.
I've encountered a minority of users who are using a wrapped vfork-based C/C++
library for process spawning as fork+exec isn't fast enough for them
Ravi Teja P added the comment:
Hi
I have raised a PR for this. But my PLA is yet to be updated (I have singed it).
But add the fix to the existing versions (3.8, 3.9 and 3.10), do I need to
raise PR for each of those branches?
--
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Python
Gregory P. Smith added the comment:
The 3.7 PR is up to the release manager to decide on, it probably isn't worth
merging there as this i not security related. thanks for the fix Serhiy!
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Change by Gregory P. Smith :
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New submission from Gregory P. Smith :
This type of change might make more sense to integrate into configure.ac and
pyconfig.h.in. (does haiku use autoconf?)
But even if not, lets not scatter haiku ifdef HAIKU references all over the
codebase. Such ifdef's to redefine things should
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nosy_count: 4.0 -> 5.0
pull_requests: +20204
pull_request: https://github.com/python/cpython/pull/21033
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Change by Gregory P. Smith :
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pull_requests: +20187
pull_request: https://github.com/python/cpython/pull/21013
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New submission from Gregory P. Smith :
Here's an example:
*** CID 1464688: Control flow issues (DEADCODE)
/Parser/parser.c: 24243 in _tmp_147_rule()
24237 &&
24238 (z = disjunction_rule(p)) // disjunction
24239 )
24240
Gregory P. Smith added the comment:
those were the three in the email (20 of 106), i need to figure out how to
login to coverity again to see the rest.
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Change by Gregory P. Smith :
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pull_request: https://github.com/python/cpython/pull/21011
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Change by Gregory P. Smith :
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pull_requests: +20183
pull_request: https://github.com/python/cpython/pull/21009
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Change by Gregory P. Smith :
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keywords: +patch
pull_requests: +20181
stage: needs patch -> patch review
pull_request: https://github.com/python/cpython/pull/21007
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New submission from Gregory P. Smith :
*** CID 1464693: Null pointer dereferences (REVERSE_INULL)
/Modules/_zoneinfo.c: 1625 in parse_abbr()
1619 ptr++;
1620
Gregory P. Smith added the comment:
I suggest waiting to see what I come up with as a proposal for what part(s) of
this makes sense in the stdlib and why. I've closed the PR.
Nothing is going to be added to mock without your agreement.
This issue is not a high priority for me, but leaving
New submission from Gordon P. Hemsley :
https://docs.python.org/3/library/stdtypes.html#old-string-formatting still
lists the 'u' string formatting option, described as "Obsolete type – it is
identical to 'd'." and linking to PEP 237.
However, testing indicates that Python 3 does n
Change by Gregory P. Smith :
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versions: +Python 3.10, Python 3.8, Python 3.9
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Change by Gregory P. Smith :
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title: subprocess_fork_exec leaks memory -> subprocess_fork_exec leaks memory
when extra_groups are supplied
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Change by Gregory P. Smith :
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Gregory P. Smith added the comment:
I expect the best decision to be to get rid of tempfile.tempdir entirely. That
would need be its own issue with a deprecation period involved.
A process global that alters behavior of all calls into a module that don't
explicitly opt-out is a bad API
Gregory P. Smith added the comment:
I'd feel fine doing that for 3.9 given 3.9.0 is only in beta and this changes
no public APIs. For 3.8 and 3.7 i wouldn't.
Be sure to update the versionchanged in the docs if you choose to do it for 3.9
Gregory P. Smith added the comment:
We consider it closer to new feature as it changes existing behavior in a way
that people cannot _depend_ on being present in older Python releases as it'd
only appear in a bugfix release, so most people could never write code
depending on it while
Gregory P. Smith added the comment:
Christian - Devin could likely use some help with the build/ifdef plumbing
required for (2) to use CRYPTO_memcmp from Modules/_operator.c when OpenSSL is
available.
--
assignee: -> christian.heimes
___
Pyt
Gregory P. Smith added the comment:
I disagree. Many of these do belong in the stdlib and we don't need a
python-ideas bike shedding 300 message thread about something so trivial.
We've been using these internally at Google for years.
Its on my plate to identify which ones to accept
Gregory P. Smith added the comment:
Could you please turn that into a Github PR?
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Python-bug
New submission from Gregory P. Smith :
https://buildbot.python.org/all/#/builders/727
test_tuples (test.test_gdb.PrettyPrintTests)
Verify the pretty-printing of tuples ... ok
test_bt (test.test_gdb.PyBtTests)
Verify that the "py-bt" command works ... FAIL
Stderr:
Python Excepti
pmp-p added the comment:
Hi, I'm always curious about others experiences : why would you need
cross-platform building for any of the officially supported platforms ?
Also on some random unsupported platforms that require cross-compilation like
maybe android, wasm or other uncommon posix
pmp-p added the comment:
Hi, i can't reproduce on standard terminals, what is your OS version and
terminal application ( also please state value of $TERM )
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Gregory P. Smith added the comment:
New changeset 6a5d3ff67644af42b1a781be2eacb2e82913441c by Gregory P. Smith in
branch 'master':
bpo-40636: Clarify the zip built-in docstring. (GH-20118)
https://github.com/python/cpython/commit/6a5d3ff67644af42b1a781be2eacb2e82913441c
New submission from Gregory P. Smith :
PEP 618 https://www.python.org/dev/peps/pep-0618 discussions are still on
going. This issue is being filed to track an implementation, assuming the PEP
is accepted and one is decided upon.
I'm filing it now, as I can at least use the issue
Change by Gregory P. Smith :
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pull_requests: +19422
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pull_request: https://github.com/python/cpython/pull/20118
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Gregory P. Smith added the comment:
Thanks!
We use this function internally in some VM traceback grabbing code but the best
solution looks to just be for us to adopt the patch to 3.9 on our interpreter
until we're running on 3.9.
--
nosy: +gregory.p.smith
Gregory P. Smith added the comment:
New changeset 18f1c60a1625d341a905c7e07367c32c08f222df by Miro Hrončok in
branch 'master':
bpo-40360: Add a What's New entry for lib2to3 pending deprecation (GH-19898)
https://github.com/python/cpython/commit/18f1c60a1625d341a905c7e07367c32c08f222df
Gregory P. Smith added the comment:
Adding aliases in openssl is presumably process global right? Is that wise
given it'd mean other openssl using c/c++ code in the process would now see
the same aliases and could behave differently when used with python vs
without?
On Sun, May 3, 2020, 3:55
Gregory P. Smith added the comment:
I think what we're doing with the documentation update is fine. We can add a
warning on stderr to the tool in 3.11. But I don't expect people will be using
the tool _from_ the latest CPython 3.x by then.
2to3 is already included with Python 2.7
Gregory P. Smith added the comment:
New changeset 503de7149d03bdcc671dcbbb5b64f761bb192b4d by Carl Meyer in branch
'master':
bpo-40360: Deprecate lib2to3 module in light of PEP 617 (GH-19663)
https://github.com/python/cpython/commit/503de7149d03bdcc671dcbbb5b64f761bb192b4d
Gregory P. Smith added the comment:
Okay,the pending deprecation is in. Keeping open as a reminder to turn that
into a real DeprecationWarning in 3.10 after the 3.9 branch is cut.
We'll then want to track reminding us to remove it in 3.12
Change by Gregory P. Smith :
--
keywords: +patch
pull_requests: +18969
stage: needs patch -> patch review
pull_request: https://github.com/python/cpython/pull/19645
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Change by Gregory P. Smith :
--
components: +2to3 (2.x to 3.x conversion tool)
stage: -> needs patch
___
Python tracker
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New submission from Gregory P. Smith :
Based on the PEP 617 acceptance thread on python-dev, lib2to3 is eventually
going to run into trouble parsing modern syntax a few releases from now.
It would be better off maintained outside of the standard library. It gets
used by a lot of things
Change by Gregory P. Smith :
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Gregory P. Smith added the comment:
raspbian failure https://buildbot.python.org/all/#/builders/645/builds/31
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Gregory P. Smith added the comment:
Marking everything as immortal/eternal after you've loaded your common code &
data but before you do your forking is thenorm for this kind of serving system.
You already presumably have a defined lifetime for the processes so they'll
likely be set to
pmp-p added the comment:
you can add
* https://github.com/pmp-p/pydk/tree/master/sources.em/Python-3.8.0b4.patchset
-- Python 3.8.x
(wasm not asm.js, clang-10+ required)
demo https://pmp-p.github.io/python-next/test.html
CPython can already run in the browser with very little patching
Gregory P. Smith added the comment:
Thanks for sharing! It's good to have a patch implementing for others who
might need it to try out.
We experimented with an implementation of this on CPython 2.7 that we called
Eternal Refcounts for YouTube many years ago. For the same reason (saving
Gregory P. Smith added the comment:
bad buildbot hardware. i've taken that bot offline.
--
resolution: -> not a bug
stage: -> resolved
status: open -> closed
type: -> crash
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Gregory P. Smith added the comment:
While I did a general apt update on that worker, I suspect I may have knocked
the heatsink loose over the weekend while dealing with an upcoming bot sitting
behind it on the shelf. That'd explain why it is alternately crashing and
making mystery results
run::
python demo.py
Release info and download page:
https://pypi.org/project/roundup
Source and documentation is available at the website:
http://roundup-tracker.org/
Mailing lists - the place to ask questions:
https://sourceforge.net/p/roundup/mailman/
About Roundup
===
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Gregory P. Smith added the comment:
PyBytesObject could become a struct that contains a single opaque internal
struct.
there is some code out there that references PyBytesObjects internals by field
name but my searches across a broad swath of code so far seem to suggest that
is so rare
Gregory P. Smith added the comment:
agreed, being opaque seems ideal.
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Gregory P. Smith added the comment:
Support for `:=` is in, are we still lacking `f(**not x)` support?
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Gregory P. Smith added the comment:
master/3.9 changeset:
https://github.com/python/cpython/commit/3c3aa4516c70753de06bb142b6793d01330fcf0f
3.8 changeset:
https://github.com/python/cpython/commit/1098671e4e5ec1513247f05598158eaa3428c5be
Gregory P. Smith added the comment:
New changeset 96c5f5a3a3fabf43e8114d0dbc30bed409da1ba6 by Tim Hatch in branch
'3.7':
[3.7] bpo-36541: lib2to3: Support named assignment expressions (GH-12702)
(GH-19317)
https://github.com/python/cpython/commit/96c5f5a3a3fabf43e8114d0dbc30bed409da1ba6
Gregory P. Smith added the comment:
updates:
- extern "C" is indeed really only about linking so it has no bearing.
What I'm hearing from talking to our C++ compiler team is unfortunately sad:
The C++ standard does not support flexible array member syntax on purpose
becaus
Gregory P. Smith added the comment:
Isn't the only actual way for a C .h file to be compatible with C++ via
extern "C" {
}
which all of our non-meta include files appear to have already?
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Change by Gregory P. Smith :
--
title: Undefined C behavior going beyond end of struct via a char[1]. ->
Undefined C behavior going beyond end of struct via a [1] arrays.
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Change by Gregory P. Smith :
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Gregory P. Smith added the comment:
"""
The [1] thing is used in more places:
PyObject *f_localsplus[1]; in PyFrameObject
PyObject *ob_item[1]; in PyTupleObject
void *elements[1]; in asdl_seq and int elements[1];` in asdl_int_seq
digit ob_digit[1]; in PyLongObject
Py_ssi
Gregory P. Smith added the comment:
>From the PR comment thread (as I opened that first):
"""Well, there was no other choice in ISO C89 than using char ob_sval[1];, no?
Is char ob_sval[]; supported by the C compiler supported by CPython? Like
Visual Studio, GCC, clang
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Change by Gregory P. Smith :
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keywords: +patch
pull_requests: +18592
pull_request: https://github.com/python/cpython/pull/19232
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New submission from Gregory P. Smith :
The correct C99 way to do this is using a char[]. PyBytesObject and unicode's
struct encoding_map both do this.
Unclear to me if we should backport this to earlier versions or not (because
PyBytesObject may be exposed?) Probably, but I also doubt
Gregory P. Smith added the comment:
marking as a 2.7 release blocker just to get benjamin's RM attention before the
final 2.7.
--
assignee: gregory.p.smith -> benjamin.peterson
nosy: +benjamin.peterson
priority: high -> release blocker
stage: resolved -> patch review
statu
Gregory P. Smith added the comment:
If anyone cares about 2.7, the *final* release is coming up in a few weeks.
They'll need to figure out what it looks like there and get a 2.7 PR reviewed
by the release manager.
--
resolution: -> fixed
stage: patch review -> resolved
Gregory P. Smith added the comment:
Thanks for the PR Ashwin!
--
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_
Gregory P. Smith added the comment:
New changeset 9165addc22d05e776a54319a8531ebd0b2fe01ef by Ashwin Ramaswami in
branch 'master':
bpo-38576: Disallow control characters in hostnames in http.client (GH-18995)
https://github.com/python/cpython/commit/9165addc22d05e776a54319a8531ebd0b2fe01ef
Gregory P. Smith added the comment:
I think those dict unpacking and merging options are sufficient that adding an
extra_env= parameter would merely complicate the already over complex API.
Thanks for the suggestions folks!
--
resolution: -> rejected
stage: -> resolved
New submission from Gregory P. Smith :
Recurring theme: The stdlib has the issue of DeprecationWarning being added to
APIs we are changing or removing a few versions in the future yet we perceive
that many people never actually bother to try checking their code for
deprecation warnings
Gregory P. Smith added the comment:
FYI - I updated the ubsan buildbot to clang 9 so this one shows up in there now:
/var/lib/buildbot/workers/clang-ubsan/3.x.gps-clang-ubsan.clang-ubsan/build/Modules/_struct.c:487:28:
runtime error: load of value 116, which is not a valid value for type
Gregory P. Smith added the comment:
If anyone else has a way to reproduce this issue, please run your tests with a
3.7/3.8/3.9 interpreter with the fix I committed applied and report back if you
still see this failure on that line.
I believe this to be fixed based on my own testing so I am
Gregory P. Smith added the comment:
Testing by changing list(sys.modules.items()) to sys.modules.copy().items()
internally with a large integration test that was reliably flaky on this line
before shows that the .copy().items() worked. The test is reliable again.
So I've gone ahead
Gregory P. Smith added the comment:
New changeset 85cf1d514b84dc9a4bcb40e20a12e1d82ff19f20 by Gregory P. Smith in
branch 'master':
bpo-13487: Use sys.modules.copy() in inspect.getmodule() for thread safety.
(GH-18786)
https://github.com/python/cpython/commit
Change by Gregory P. Smith :
--
pull_requests: +18143
stage: resolved -> patch review
pull_request: https://github.com/python/cpython/pull/18786
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Gregory P. Smith added the comment:
Serhiy: Why is dict.copy() not thread safe?
if what you say of list(dict) being safe, iterating over that and looking up
the keys would work. But all of this is entirely non-obvious to the reader of
the code. all of these _look_ like they should be safe
Gregory P. Smith added the comment:
fyi - we just had a test run into this (in a flaky manner - definitely a race
condition) at work:
```
...
for f in inspect.stack(context=0)
File "/inspect.py", line 1499, in stack
return getouterframes(sys._getframe(1), conte
Gregory P. Smith added the comment:
fwiw oss-fuzz also finds this on struct (via ubsan)
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=20949
struct.unpack('?', ' ')
--
___
Python tracker
<https://bugs.python.org/issue39
Gregory P. Smith added the comment:
I _doubt_ there is code expecting the default year when unspecified to actually
be 1900.
Change that default to any old year with a leap year (1904?) and it'll still
(a) stand out as a special year that can be looked up should it wind up being
_used_
Gregory P. Smith added the comment:
While i don't think this was needed in 3.7 and 3.8, you kept the default
behavior the same so I don't think it is a problem.
If someone builds an interpreter with this configure flag, does it break
compatibility with anything that code may have started
Gregory P. Smith added the comment:
FYI - this appears to have caused a regression -
https://bugs.python.org/issue39776
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Python tracker
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Gregory P. Smith added the comment:
if anyone needs this on their older 3.6 or 3.5 trees, the 3.7/3.8 patch is a
trivial backport.
--
stage: patch review -> commit review
status: open -> closed
___
Python tracker
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Gregory P. Smith added the comment:
New changeset 7c64726ced3d6b5d04537386d6a9ca6d179c3be4 by Gregory P. Smith in
branch '3.7':
[3.7] bpo-39769: Fix compileall ddir for subpkgs. (GH-18676) (GH-18718)
(GH-18725)
https://github.com/python/cpython/commit
Change by Gregory P. Smith :
--
pull_requests: +18082
pull_request: https://github.com/python/cpython/pull/18725
___
Python tracker
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Gregory P. Smith added the comment:
New changeset ce720d3e0674d6ac6f1b950c20a89be4cfde7853 by Gregory P. Smith in
branch '3.8':
bpo-39769: Fix compileall ddir for subpkgs. (GH-18676) (GH-18718)
https://github.com/python/cpython/commit/ce720d3e0674d6ac6f1b950c20a89be4cfde7853
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