Change by anthony shaw :
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versions: +Python 3.10, Python 3.11
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New submission from anthony shaw :
Providing an (invalid) input to the parser causes an exponentially-slow DoS to
the Python executable in 3.10.
e.g.
python3.10 -c "{:"
takes ~2 seconds
python3.10 -c ":"
takes ~22 seco
New submission from anthony shaw :
In tokenizer.c, the translate_newlines() function does a `strlen()` on the
input string, if the string is not null-terminated, e.g.
'\xbe' this leads to a heap-buffer-overflow. The overflow is not exploitable,
but if there are further changes to the parser
anthony shaw added the comment:
After some experimentation, this can be done if you enable ASAN in all projects
except python3dll.vcxproj
I think it would make sense (if this were supported) to have a flag in
build.bat like there is for pgo
`build.bat --asan
New submission from anthony shaw :
I'd like to compile my C-extensions with ASAN for testing in Windows, but they
cannot be loaded as the host python.exe process needs to be compiled with ASAN.
https://docs.microsoft.com/en-us/cpp/sanitizers/asan?view=msvc-170#ide-msbuild
The EnableASAN
anthony shaw added the comment:
Thanks! I didn't realise it applied the negative operator instead of loading
the constant value.
--
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Python tracker
<https://bugs.python.org/issue44
Change by anthony shaw :
--
title: Const unfolding in parser with negative numbers doesn't match float/int
behaviour -> Const folding in parser with negative numbers doesn't match
float/int behaviour
___
Python tracker
<https://bugs.pyth
New submission from anthony shaw :
Powers with negative bases do not observe the same rules that
float_pow/long_pow do when it comes to returning negative results/
Example:
> -2 ** 2
-4
>>> x = -2
>>> y = 2
>>> x ** y
4
>>> -2. ** 2.
-4.0
>&g
anthony shaw added the comment:
Guido, regen.vcxproj targets 142 as the SDK version, which is most likely a
mistake.
The other projects are part of the main PCBuild.sln solution, which has a
variable for the base SDK version.
If you need to change it quickly, you can either open it in VS
anthony shaw added the comment:
Example script attached works perfectly on macOS
> python3.9 test.py
[('default',
'http://schemas.openxmlformats.org/officeDocument/2006/extended-properties'),
('vt', 'http://schemas.openxmlformats.org/officeDocument/2006/docPropsVTypes')]
[('defa
anthony shaw added the comment:
which version of Python were you doing this on?
The function in question is
https://github.com/python/cpython/blob/master/Lib/xml/etree/ElementTree.py#L1233-L1278
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<ht
anthony shaw added the comment:
thanks, it would be great if this were documented in the --help section like
the other options which require a debug build (-X showrefcount)
--
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Python tracker
<https://bugs.python.org/issue42
New submission from anthony shaw :
I noticed since the new parser implementation, the debug mode in the tokeniser
is no longer working.
This is the case for 3.9.0 and also 3.9.1rc1. Running python3.9 with a simple
application like this:
# Demo application
def my_function():
proceed
Change by anthony shaw :
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anthony shaw added the comment:
No, this is intentional. sorry. closing
https://github.com/python/cpython/blob/34cd3e9f6a87f9c50edac893b0d5ae46c4e48ee3/Doc/library/dis.rst#L1194
--
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<https://bugs.python.org/issue41
anthony shaw added the comment:
Or is this some sort of obscure month python reference!?
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New submission from anthony shaw :
I noticed that HAVE_ARGUMENT and STORE_NAME have the same value (90) in
Include/opcode.h in both the source code and in the 2bd31b5f revision
(3.9.0rc2).
This must be creating some weird bugs.
https://github.com/python/cpython/blob
Change by anthony shaw :
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nosy: +anthonypjshaw
nosy_count: 4.0 -> 5.0
pull_requests: +19480
pull_request: https://github.com/python/cpython/pull/17753
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Change by anthony shaw :
--
keywords: +patch
pull_requests: +19202
stage: needs patch -> patch review
pull_request: https://github.com/python/cpython/pull/19891
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Python tracker
<https://bugs.python.org/issu
New submission from anthony shaw :
the tools/peg_generator package contains a number of unused imports
--
components: Interpreter Core
messages: 368005
nosy: anthonypjshaw, pablogsal
priority: normal
severity: normal
stage: needs patch
status: open
title: peg_generator module has
Change by anthony shaw :
--
keywords: +patch
pull_requests: +19108
stage: -> patch review
pull_request: https://github.com/python/cpython/pull/19785
___
Python tracker
<https://bugs.python.org/issu
New submission from anthony shaw :
The additional tasks in the MSBuild project for pegen regeneration are not
functional:
- Setting PYTHONPATH= inline cannot be done in Windows using that method
- The task does not inherit environment variables that way
- The path to the peg_generator module
Change by anthony shaw :
--
keywords: +patch
pull_requests: +17647
stage: -> patch review
pull_request: https://github.com/python/cpython/pull/18272
___
Python tracker
<https://bugs.python.org/issu
New submission from anthony shaw :
Within the documentation, there are some really important security
considerations for standard library modules. e.g. subprocess, ssl, pickle, xml.
There is currently no "index" of these, so you have to go hunting for them.
They're easter e
anthony shaw added the comment:
Resolved by another bpo
--
resolution: -> fixed
stage: patch review -> resolved
status: open -> closed
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Python tracker
<https://bugs.python.or
New submission from anthony shaw :
Very minor, but the instructions in Tools/msi/readme.txt tell the user to
ensure hg.exe is in PATH, but the scripts use Git.
--
components: Windows
messages: 359179
nosy: anthonypjshaw, paul.moore, steve.dower, tim.golden, zach.ware
priority: normal
Change by anthony shaw :
--
keywords: +patch
pull_requests: +17225
stage: -> patch review
pull_request: https://github.com/python/cpython/pull/17792
___
Python tracker
<https://bugs.python.org/issu
Change by anthony shaw :
--
keywords: +patch
pull_requests: +17224
stage: -> patch review
pull_request: https://github.com/python/cpython/pull/17791
___
Python tracker
<https://bugs.python.org/issu
New submission from anthony shaw :
The build.bat script (windows build) has a flag for verbose, which sets the
msbuild verbosity level to normal.
The default level is minimal.
The quiet and detailed levels would also be useful for development.
--
components: Windows
messages: 359178
anthony shaw added the comment:
This comes down to a logic bug in detect_tkinter_darwin(), shown in
https://github.com/python/cpython/pull/17753/files#r361956102
--
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<https://bugs.python.org/issue39
Change by anthony shaw :
--
keywords: +patch
pull_requests: +17189
stage: -> patch review
pull_request: https://github.com/python/cpython/pull/17753
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Python tracker
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anthony shaw added the comment:
I also can't see how this condition would ever match, since macosx_sdk_root()
is not in the list being iterated upon,
https://github.com/python/cpython/blob/master/setup.py#L1774
--
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Change by anthony shaw :
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New submission from anthony shaw :
./configure && make -j4 is returning:
Failed to build these modules:
_tkinter
I'm running macOS 10.15.2, with the SDK installed using `xcode-select
--install` (no funny business)
/Library/D
Change by anthony shaw :
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Change by anthony shaw :
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keywords: +patch
pull_requests: +17185
stage: -> patch review
pull_request: https://github.com/python/cpython/pull/17747
___
Python tracker
<https://bugs.python.org/issu
anthony shaw added the comment:
Updated version based on principles:
- Should not specify --with(out) in help string
- Sentences should start with lowercase (as autoconf generates the builtin
string with lower case)
- --with-xyx=VALUE will be described as "overriding"
-
anthony shaw added the comment:
Current
Optional Features:
--disable-option-checking ignore unrecognized --enable/--with options
--disable-FEATURE do not include FEATURE (same as --enable-FEATURE=no)
--enable-FEATURE[=ARG] include FEATURE [ARG=yes]
--enable-universalsdk
New submission from anthony shaw :
I've noticed that ./configure --help is inconsistent.
- The way default values are shared
- The way enumerated
- The verbs used (e.g. enable, set)
- Some --with-xyx and some --with(out-xyz)
- Some start with capitals, others don't
Also, many of the flags
Change by anthony shaw :
--
keywords: +patch
pull_requests: +17166
stage: -> patch review
pull_request: https://github.com/python/cpython/pull/17721
___
Python tracker
<https://bugs.python.org/issu
anthony shaw added the comment:
Also, make tags will reset the "tags" file, whereas, make TAGS will not.
If you ran "make tags" then "make TAGS" you will have a corrupt etags file
--
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<h
New submission from anthony shaw :
make tags will include
- Modules/_ctypes/
where as make TAGS will not.
Also, neither include the Python source files for the standard library, which
both etags and ctags are capable of handling.
PR to follow
--
components: Build
messages: 358917
anthony shaw added the comment:
If you can write a test similar to the AnotherLeak.test_callback test case, and
commit that first.
It will show in the CI/CD log as failed and verify the issue (incase it comes
up in PR review)
Then add another commit with the patch itself and we should see
anthony shaw added the comment:
Thanks Eryk that saved a lot of debugging.
dgelessus - if you want to write a patch for CPython am happy to take you
through this and get it over the line.
Else: am Happy to write a test against the gc counter and a patch
anthony shaw added the comment:
In the stack it's calling none_dealloc() which should never happen.
Assume this is being triggered by ctypes PyCFuncPtr_call.
The stacktrace I'm getting comes after the double decref so it's not showing
the root cause. Someone who knows ctypes better might
anthony shaw added the comment:
Full trace for reference:
(lldb) bt all
* thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
* frame #0: 0x7fff5984f2c6 libsystem_kernel.dylib`__pthread_kill + 10
frame #1: 0x7fff59904bf1 libsystem_pthread.dylib`pthread_kill
anthony shaw added the comment:
>From lldb
(lldb) run ~/cpython/test_gc_ctypes.py
Process 20059 launched: '/Users/anthonyshaw/CLionProjects/cpython/python.exe'
(x86_64)
Fatal Python error: deallocating None
Current thread 0x0001005c85c0 (most recent call first):
File &quo
anthony shaw added the comment:
The documentation says:
>>
Note Make sure you keep references to CFUNCTYPE() objects as long as they are
used from C code. ctypes doesn’t, and if you don’t, they may be garbage
collected, crashing your program when a callback is made.
Also
anthony shaw added the comment:
Thanks, I'll check this out
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anthony shaw added the comment:
"When the C library is called in ctypes to return the c_char_p type, the
problem that only the string before \0 can be obtained when the string contains
\\0"
This function is specifically for null-terminated strings (\0), please could
you be mor
anthony shaw added the comment:
Closing as duplicate of 36882
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Change by anthony shaw :
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anthony shaw added the comment:
The existing tests in place add the null-termination bytes in the test string:
def testLinuxAbstractNamespace(self):
address = b"\x00python-test-hello\x00\xff"
with socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) as s1:
Change by anthony shaw :
--
versions: +Python 3.8 -Python 2.7, Python 3.4, Python 3.7
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anthony shaw added the comment:
thanks, your code example zero-pads the socket address, and looking at the
socketmodule.c code it does some padding under certain circumstances.
https://github.com/python/cpython/blob/master/Modules/socketmodule.c#L1318-L1330
The Unix man page specify the same
Change by anthony shaw :
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status: open -> closed
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Change by anthony shaw :
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nosy: +anthonypjshaw
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Change by anthony shaw :
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assignee: -> anthonypjshaw
nosy: +anthonypjshaw
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Change by anthony shaw :
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nosy: +anthonypjshaw
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Change by anthony shaw :
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nosy: +steve.dower
stage: patch review ->
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Change by anthony shaw :
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keywords: +patch
pull_requests: +13126
stage: -> patch review
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New submission from anthony shaw :
The PCBuild tool should support VS2019 but default to 2017 as per documentation.
PR to follow.
--
assignee: anthonypjshaw
components: Build
messages: 341963
nosy: anthonypjshaw
priority: normal
severity: normal
status: open
title: Add Visual Studio
anthony shaw added the comment:
thanks, will wait for a review from Serhiy, Rbcollins or ezio
--
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<https://bugs.python.org/issue24263>
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anthony shaw added the comment:
Hi,
This discussion came to a stop, but it doesn't seem conclusive.
PEP discussions are now in GitHub on https://github.com/python/peps/issues so
I'm going to close this BPO issue.
There is no additional section in PEP 7 for this level of detail
anthony shaw added the comment:
After patch:
Python 3.8.0a3+ (heads/31968-dirty:c664b342a4, May 6 2019, 18:06:21)
[Clang 10.0.1 (clang-1001.0.46.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>
anthony shaw added the comment:
Issue is in parse_file_actions
parse_file_actions(PyObject *file_actions,
posix_spawn_file_actions_t *file_actionsp,
PyObject *temp_buffer)
{
PyObject *seq;
PyObject *file_action = NULL;
PyObject *tag_obj
anthony shaw added the comment:
Raised a fix in GH-13144
--
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Change by anthony shaw :
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pull_requests: +13057
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anthony shaw added the comment:
Verified on master
Python 3.8.0a3+ (heads/bpo-28367:373c7aa098, May 6 2019, 17:34:39)
[Clang 10.0.1 (clang-1001.0.46.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>
anthony shaw added the comment:
Easily reproduced on master, thanks
(lldb) run encode_crash.py
Process 14743 launched: '/Users/anthonyshaw/repo/cpython/python.exe' (x86_64)
Objects/unicodeobject.c:448: _PyUnicode_CheckConsistency: Assertion
"((PyObject*)(op))->ob_type))->tp_fl
anthony shaw added the comment:
This could be a good issue for the PyCon sprints, otherwise I'm happy to
implement it
--
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Python tracker
<https://bugs.python.org/issue36
New submission from anthony shaw :
I noticed that the termios.c module is largely untested.
There is some coverage via test_pty, test_ioctl and test_getpass, but there is
nothing to cover regression and the behaviours in the module functions.
Tests are required for:
- termios.tcgetattr
anthony shaw added the comment:
Converted the original patch as a PR GH-13142 this seems like a good idea and
an easy change
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anthony shaw added the comment:
It would be great for this issue to be revisited, there has been some further
interest from users.
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Python tracker
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anthony shaw added the comment:
Closing as 3rd party feature for setuptools
--
nosy: +anthonypjshaw
resolution: -> third party
stage: -> resolved
status: open -> closed
___
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anthony shaw added the comment:
Hi Nofar are you still interested on working on this request?
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anthony shaw added the comment:
Added a PR for the documentation clarification.
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anthony shaw added the comment:
The code is mostly:
FieldNameIterator * related functions
FormatterIterator * related functions
MarkupIterator * related functions
There are a few other utility methods in there as well
--
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status: open -> closed
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anthony shaw added the comment:
hi, which version of Python were you using to do this? Please could you provide
the full code snippet to reproduce the issue.
The following example binds to the correct namespace
from socket import *
sock = socket(AF_UNIX, SOCK_STREAM)
sock.bind(&qu
anthony shaw added the comment:
NB: This issue would be good for PyCon sprints
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Change by anthony shaw :
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nosy: +Mariatta
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anthony shaw added the comment:
> The things that are in this file but are unrelated to unicodeobject.c
are the support routines for implementing string.Formatter.
I'm not sure which functions that relates to, if you could let me know I'd be
happy to add those to the
Change by anthony shaw :
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pull_requests: +13050
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anthony shaw added the comment:
Eric, there have been further changes to Objects/stringlib/unicode_format.h
since this original note, I've raised a PR with the intent of your note from
2015.
There also hasn't been any change to the situation, unicode_format.h is only
used
anthony shaw added the comment:
The assertions in the attached test still fail on master (3.8a3), so this still
applies.
Michael, are you able to look at this, the code hasn't changed since the
original PEP417 implementation, which doesn't specify if this behaviour should
be supported
anthony shaw added the comment:
Revisiting this issue as it's still open. The original patch was for 3.3a0,
there have been many changes to both IDLE and the Windows build since,
including the recent IDLE entry point in the new Windows installer.
Steve, Terry, please could you review
anthony shaw added the comment:
This issue was never responded to, are you still having this issue? Which
version of CPython are you using and can you please provide steps to reproduce
the problem.
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anthony shaw added the comment:
Hi Peter, this proposal would be easier to review as a GitHub Pull Request.
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anthony shaw added the comment:
Submitted PR to add the deprecation warning, since this initial discussion,
some other functions also raise DeprecationWarning's in code.
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Change by anthony shaw :
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pull_requests: +13040
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anthony shaw added the comment:
The discussion on python-ideas has some unresolved questions. Wren, did you get
a definitive answer on this idea?
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anthony shaw added the comment:
Francisco, I recommend converting the patch into a GitHub pull request to make
it easier to code review.
Mark, Raymond, please could you re-review this patch.
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