[issue25083] Python can sometimes create incorrect .pyc files

2015-11-02 Thread tzickel
tzickel added the comment: 1. You are correct the issue I am talking about is in parsing source files (Altough because python caches them as .pyc it's a worse situation). 2. The example you give is EINTR handling (which is mostly handling interrupted I/O operations by signals and retrying them

[issue25083] Python can sometimes create incorrect .pyc files

2015-11-01 Thread tzickel
tzickel added the comment: TL:DR Python 2 forgot to do I/O error checking when reading .py files from disk. On some rare situations this can bite Python in the ass and cause it to bork .pyc files. Checked python 3, it checks the I/O in a different / better way. Next python 2.7 is out in 1.5

[issue25562] Python 2 & 3 don't allow the user to disable ctypes SEH in windows

2015-11-05 Thread tzickel
New submission from tzickel: In Windows, there is a mechanizm called SEH that allows C/C++ programs to catch OS Exceptions (such as divide by zero, page faults, etc..). Python's ctypes module for some reason forces the user to wrap all ctypes FFI calls with a special SEH wrapper that converts

[issue25083] Python can sometimes create incorrect .pyc files

2015-09-14 Thread tzickel
tzickel added the comment: You are not looking at the correct code, the function you are pointing to, check_compiled_module is run to check the existing .pyc (it is a good question, why the .pyc is overriden, but that is a secondary issue, which I cannot reproduce as I've said by demand). I

[issue25083] Python can sometimes create incorrect .pyc files

2015-09-14 Thread tzickel
Changes by tzickel <icebr...@yahoo.com>: -- nosy: +brett.cannon, meador.inge ___ Python tracker <rep...@bugs.python.org> <http://bugs.python

[issue25083] Python can sometimes create incorrect .pyc files

2015-09-15 Thread tzickel
tzickel added the comment: As for the "example" .pyc just create an empty 0 byte .py file and compile it, that is the same .pyc that is created in my system (instead in my case the .py is not empty). Just so people don't have to trace the code like I did, here is the traceback of t

[issue25083] Python can sometimes create incorrect .pyc files

2015-09-18 Thread tzickel
tzickel added the comment: Not sure why nobody has responded yet, but I have gone up and made a patch for the problem for 2.7 HEAD. Would be great if someone with more understanding of python's source could say if this is the optimal place to do the ferror test. I am able to see

[issue26003] Issues with PyEval_InitThreads and PyGILState_Ensure

2016-01-03 Thread tzickel
New submission from tzickel: A few issues regarding threads: A. (Python 2 & 3) The documentation (https://docs.python.org/3/c-api/init.html) about initializing the GIL/Threading system does not specify that calling PyEval_InitThreads actually binds the calling thread as the main_th

[issue19576] "Non-Python created threads" documentation doesn't mention PyEval_InitThreads()

2016-01-03 Thread tzickel
tzickel added the comment: I think that the document regarding PyGILState_Ensure and PyEval_InitThreads should be clarified better, written in issue #26003 -- nosy: +tzickel ___ Python tracker <rep...@bugs.python.org> <http://bugs.p

[issue26003] Issues with PyEval_InitThreads and PyGILState_Ensure

2016-01-03 Thread tzickel
Changes by tzickel <icebr...@yahoo.com>: -- nosy: +pitrou ___ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue26003> ___ ___ Python

[issue25083] Python can sometimes create incorrect .pyc files

2016-01-03 Thread tzickel
Changes by tzickel <icebr...@yahoo.com>: -- nosy: +serhiy.storchaka ___ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue25083> ___ _

[issue25083] Python can sometimes create incorrect .pyc files

2015-11-19 Thread tzickel
tzickel added the comment: Meador Inge any other questions regarding the issue ? I can't believe 2.7.11 is coming out soon, and nobody is taking this issue seriously enough... -- ___ Python tracker <rep...@bugs.python.org> <http://bugs.p

[issue25083] Python can sometimes create incorrect .pyc files

2016-06-20 Thread tzickel
tzickel added the comment: any chance for 2.6.12 ? 4 line patch. -- ___ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue25083> ___ ___

[issue21878] wsgi.simple_server's wsgi.input read/readline waits forever in certain circumstances

2016-02-19 Thread tzickel
tzickel added the comment: Just encountered this issue as well. It's not related to newlines, but to not supporting HTTP or persistent connections (the wsgi.input is the socket's I/O directly, and if the client serves a persistent connection, then the .read() will block forever). A simple

[issue27743] Python 2 has a wrong artificial limit on the amount of memory that can be allocated in ctypes

2016-08-12 Thread tzickel
New submission from tzickel: Python 2 has a wrong artificial limit on the amount of memory that can be allocated in ctypes via sequence repeating (i.e. using create_string_buffer or c_char * ) The problem is practical in Windows 64 bit, when running python 64 bit, since in that platform

[issue25083] Python can sometimes create incorrect .pyc files

2016-06-20 Thread tzickel
tzickel added the comment: Sorry Brett of course I meant the upcoming 2.7.12 -- ___ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/i

[issue28824] os.environ should preserve the case of the OS keys ?

2016-11-28 Thread tzickel
tzickel added the comment: Steve, I've checked in Python 3.5.2, and os.environ.keys() still uppercases everything when scanning (for my use case). Has it changed since then ? -- ___ Python tracker <rep...@bugs.python.org> <http://bugs.p

[issue28824] os.environ should preserve the case of the OS keys ?

2016-11-28 Thread tzickel
New submission from tzickel: In Windows, python's os.environ currently handles the case sensitivity different that the OS. While it's true that the OS is case insensitive, it does preserve the case that you first set it as. For example: C:\Users\user>set aSD=Blah C:\Users\user>set a

[issue28824] os.environ should preserve the case of the OS keys ?

2016-11-28 Thread tzickel
tzickel added the comment: My issue is that somebody wants to pass a few dict like environment variables as some prefix_key=value but he wants to preserve the case of the key for usage in python so the .keys() space needs to be enumerated. A workaround for this issue can be importing nt

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

2017-09-01 Thread tzickel
tzickel added the comment: One should be careful with this modification because of the Windows definition of process groups. For example, if multi-threaded code thinks that by reading the value of the new os.cpu_count() it can use all the cores returned, by default it cannot as in windows

[issue25083] Python can sometimes create incorrect .pyc files

2017-10-21 Thread tzickel
tzickel <icebr...@yahoo.com> added the comment: Added a script to check if the bug exists (provided you have an updated strace 4.15 or above). Without patch: # ./import_io_check.sh strace: Requested path 'tmp.py' resolved into '/root/tmp.py' read(3, 0x55fc3a71cc50, 4096) = -1

[issue25083] Python can sometimes create incorrect .pyc files

2017-10-21 Thread tzickel
tzickel <icebr...@yahoo.com> added the comment: OK, This issue has been biting me a few more times in production, so for now I've added the environment variable PYTHONDONTWRITEBYTECODE which resolves it (but it's a hack). I'm sure I am not the only one with it (recall that this is hap

[issue25083] Python can sometimes create incorrect .pyc files

2017-10-21 Thread tzickel
tzickel <icebr...@yahoo.com> added the comment: Ignore the hash append / link at the start of each shell command (it's the output from docker, and not related to python commits). BTW, forgot to mention, of course when doing the fault injection on the .py files, the error is bad a

[issue34300] gcc 7.3 causes a warning when compiling getpath.c in python 2.7

2018-07-31 Thread tzickel
tzickel added the comment: Changing Py_FatalError prototype to add: __attribute__((noreturn)) also stops the warning. -- ___ Python tracker <https://bugs.python.org/issue34

[issue34300] gcc 7.3 causes a warning when compiling getpath.c in python 2.7

2018-07-31 Thread tzickel
New submission from tzickel : When compiling on ubuntu 18.04 the 2.7 branch, I get this warning: gcc -pthread -c -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I. -IInclude -I./Include -DPy_BUILD_CORE -DPYTHONPATH='":plat-linux2:lib-tk:li

[issue34172] multiprocessing.Pool and ThreadPool leak resources after being deleted

2018-08-04 Thread tzickel
tzickel added the comment: It actually makes tons of sense that while the thread is running, that the object representing it is alive. After the thread finishes its work, the object dies. >>> import time, threading, weakref, gc >>> t = threading.Thread(target=time.sleep,

[issue34172] multiprocessing.Pool and ThreadPool leak resources after being deleted

2018-07-20 Thread tzickel
New submission from tzickel : In multiprocessing.Pool documentation it's written "When the pool object is garbage collected terminate() will be called immediately.": https://docs.python.org/3.7/library/multiprocessing.html#multiprocessing.pool.Pool.terminate A. This does not happen

[issue34172] multiprocessing.Pool and ThreadPool leak resources after being deleted

2018-07-21 Thread tzickel
tzickel added the comment: >>> from multiprocessing import Pool >>> import gc >>> a = Pool(10) >>> del a >>> gc.collect() 0 >>> After this, there are still left behind Process (Pool) or Dummy (ThreadPool) and big _cache data (If you did s

[issue34172] multiprocessing.Pool and ThreadPool leak resources after being deleted

2018-07-23 Thread tzickel
tzickel added the comment: I think I've found the code bug causing the leak: https://github.com/python/cpython/blob/caa331d492acc67d8f4edd16542cebfabbbe1e79/Lib/multiprocessing/pool.py#L180 There is a circular reference between the Pool object, and the self._worker_handler Thread object

[issue34172] multiprocessing.Pool and ThreadPool leak resources after being deleted

2018-07-24 Thread tzickel
Change by tzickel : -- keywords: +patch pull_requests: +7972 stage: -> patch review ___ Python tracker <https://bugs.python.org/issue34172> ___ ___ Python-

[issue25083] Python can sometimes create incorrect .pyc files

2018-07-24 Thread tzickel
Change by tzickel : -- pull_requests: +7971 stage: -> patch review ___ Python tracker <https://bugs.python.org/issue25083> ___ ___ Python-bugs-list mai

[issue34172] multiprocessing.Pool and ThreadPool leak resources after being deleted

2018-07-22 Thread tzickel
tzickel added the comment: But alas that does not work... -- nosy: +davin, pitrou ___ Python tracker <https://bugs.python.org/issue34172> ___ ___ Python-bug

[issue34172] multiprocessing.Pool and ThreadPool leak resources after being deleted

2018-07-23 Thread tzickel
tzickel added the comment: What other object in the standard lib, leaks resources when deleted in CPython ? Even that documentation says the garbage collector will eventually destroy it, just like here... I think there is an implementation bug

[issue35030] Python 2.7 OrderedDict creates circular references

2018-10-20 Thread tzickel
tzickel added the comment: You can see the testing code here: https://github.com/numpy/numpy/blob/eb40e161e2e593762da9c77858343e3720351ce7/n umpy/testing/_private/utils.py#L2199 it calls gc.collect in the end and only throws this error if it returns a non zero return value from it (after

[issue35030] Python 2.7 OrderedDict creates circular references

2018-10-20 Thread tzickel
tzickel added the comment: I see, so basically this would be a problem only if the root object had a __del__ method and then the GC wouldn't reclaim it ? -- ___ Python tracker <https://bugs.python.org/issue35

[issue3243] Support iterable bodies in httplib

2018-10-29 Thread tzickel
Change by tzickel : -- pull_requests: +9540 ___ Python tracker <https://bugs.python.org/issue3243> ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue35117] set.discard should return True or False based on if element existed.

2018-11-01 Thread tzickel
tzickel added the comment: I would think that the .discard is the equivalent of .pop in dict. (instead of wasting time once checking and once removing, also the data in a set is the data, there is no value to check). Even the standard lib has lots of usage of dict.pop(key, None

[issue35117] set.discard should return True or False based on if element existed.

2018-10-30 Thread tzickel
New submission from tzickel : Sometimes you want to do something based on if the item existed before removal, so instead of checking if it exists, then removing and doing something, if would be nice to make the function return True or False based on if the element existed

[issue3243] Support iterable bodies in httplib

2018-10-30 Thread tzickel
tzickel added the comment: This patch was opened for 2.7 but never applied there ? https://github.com/python/cpython/pull/10226 This causes a bug with requests HTTP library (and others as well as httplib) when you want to send an iterable object as POST data (with a non-chunked way

[issue35030] Python 2.7 OrderedDict creates circular references

2018-10-26 Thread tzickel
tzickel added the comment: Is this commit interesting ? It has less lines, more simple and makes no cycles to collect, and it seems in my limited benchmark faster than the current implementation. https://github.com/tzickel/cpython/commit/7e8b70b67cd1b817182be4dd2285bd136e6b156d

[issue35030] Python 2.7 OrderedDict creates circular references

2018-10-26 Thread tzickel
tzickel added the comment: Sorry ignore it. Closed the PR as well. -- ___ Python tracker <https://bugs.python.org/issue35030> ___ ___ Python-bugs-list mailin

[issue35030] Python 2.7 OrderedDict leaks memory

2018-10-20 Thread tzickel
New submission from tzickel : https://github.com/requests/requests/issues/4553#issuecomment-431514753 It was fixed in Python 3 by using weakref, but not backported to Python 2. Also might be nice to somehow to that leak test in more places to detect such issues ? -- components

[issue35030] Python 2.7 OrderedDict creates circular references

2018-10-20 Thread tzickel
Change by tzickel : -- keywords: +patch pull_requests: +9344 stage: -> patch review ___ Python tracker <https://bugs.python.org/issue35030> ___ ___ Python-

[issue35210] Use bytes + memoryview + resize instead of bytesarray + array in io.RawIOBase.read

2018-11-10 Thread tzickel
New submission from tzickel : There was a TODO in the code about this: https://github.com/python/cpython/blob/e42b705188271da108de42b55d9344642170aa2b/Modules/_io/iobase.c#L909 -- components: IO messages: 329629 nosy: tzickel priority: normal severity: normal status: open title: Use

[issue35210] Use bytes + memoryview + resize instead of bytesarray + array in io.RawIOBase.read

2018-11-10 Thread tzickel
tzickel added the comment: How is that different from the situation today ? The bytearray passed to readinto() is deleted before the function ends. This revision simply changes 2 mallocs and a memcpy to 1 malloc and a potential realloc

[issue35210] Use bytes + memoryview + resize instead of bytesarray + array in io.RawIOBase.read

2018-11-10 Thread tzickel
tzickel added the comment: I think that if someone tries that this code will raise an exception at the resize part (since the reference will be higher than one), a check can be added and in this case fallback to the previous behaviour, If it's a required check, I can add

[issue35210] Use bytes + memoryview + resize instead of bytesarray + array in io.RawIOBase.read

2018-11-10 Thread tzickel
Change by tzickel : -- nosy: +benjamin.peterson, stutzbach ___ Python tracker <https://bugs.python.org/issue35210> ___ ___ Python-bugs-list mailing list Unsub

[issue35210] Use bytes + memoryview + resize instead of bytesarray + array in io.RawIOBase.read

2018-11-10 Thread tzickel
Change by tzickel : -- keywords: +patch pull_requests: +9726 stage: -> patch review ___ Python tracker <https://bugs.python.org/issue35210> ___ ___ Python-

[issue35210] Use bytes + memoryview + resize instead of bytesarray + array in io.RawIOBase.read

2018-11-10 Thread tzickel
tzickel added the comment: ahh, very interesting discussion. BTW, how is this code different than https://github.com/python/cpython/blame/50ff02b43145f33f8e28ffbfcc6a9d15c4749a64/Modules/_io/bufferedio.c which does the same thing exactly ? (i.e. the memoryview can leak there as well

[issue34172] multiprocessing.Pool and ThreadPool leak resources after being deleted

2018-10-03 Thread tzickel
Change by tzickel : -- pull_requests: +9072 ___ Python tracker <https://bugs.python.org/issue34172> ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue34172] multiprocessing.Pool and ThreadPool leak resources after being deleted

2018-10-03 Thread tzickel
tzickel added the comment: Its ok, you only did it twice :) I've submitted a manual 2.7 fix on GH. -- ___ Python tracker <https://bugs.python.org/issue34

[issue34172] multiprocessing.Pool and ThreadPool leak resources after being deleted

2018-12-01 Thread tzickel
tzickel added the comment: A. It would be nice to add a test that tests this. B. Now that Pool is cleaning up properly, any of it's functions which return another object (like imap's IMapIterator) need to hold a reference to the Pool, so it won't get cleanedup before computing

[issue34172] multiprocessing.Pool and ThreadPool leak resources after being deleted

2018-12-01 Thread tzickel
tzickel added the comment: here is something quick I did to check if it works (it works) but I'm not fluent in multiprocessing code, so If i'm missing something or doing something wrong feel free to tell me: https://github.com/tzickel/cpython/commit/ec63a43706f3bf615ab7ed30fb095607f6101e26

[issue34172] multiprocessing.Pool and ThreadPool leak resources after being deleted

2018-12-03 Thread tzickel
tzickel added the comment: Reverting the code will cause another class of problems, like the reason I fixed it. Programs written such as the example that Pablo gave (and what I've seen) will quietly leak child processes, file descriptors (for the pipes) and memory to a variety degree might

[issue35378] multiprocessing.Pool.imaps iterators do not maintain alive the multiprocessing.Pool objects

2018-12-02 Thread tzickel
tzickel added the comment: It's important to note that before those PR, that code would leak the Pool instance until the process ends (once per call). https://github.com/python/cpython/compare/master...tzickel:fix34172 Is my proposed fix (till I get it to a PR

[issue35378] multiprocessing.Pool.imaps iterators do not maintain alive the multiprocessing.Pool objects

2018-12-02 Thread tzickel
tzickel added the comment: I dont mind, I think my code is ready for review, but I'm not versed in this, so if you think you have something better, feel free to open a PR or tell me if I should submit mine, and you can comment on it: https://github.com/python/cpython/compare/master

[issue34172] multiprocessing.Pool and ThreadPool leak resources after being deleted

2018-12-03 Thread tzickel
tzickel added the comment: The previous posts here touch all this subjects: A. The documentation explicitly says: "When the pool object is garbage collected terminate() will be called immediately." (Happened till a code refactor 9 years ago introduced this bug). B. Large amou

[issue35378] multiprocessing.Pool.imaps iterators do not maintain alive the multiprocessing.Pool objects

2018-12-09 Thread tzickel
tzickel added the comment: https://bugs.python.org/issue35267 -- ___ Python tracker <https://bugs.python.org/issue35378> ___ ___ Python-bugs-list mailin

[issue35378] multiprocessing.Pool.imaps iterators do not maintain alive the multiprocessing.Pool objects

2019-01-13 Thread tzickel
tzickel added the comment: +1 -- ___ Python tracker <https://bugs.python.org/issue35378> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.pyth

[issue36226] multipart/related header causes false positive StartBoundaryNotFoundDefect and MultipartInvariantViolationDefect

2019-09-03 Thread tzickel
tzickel added the comment: It should be noted that this causes a big headache for users of requests / urllib3 / etc... as those print on each multipart response a logging warning based on this bug, and it might cause people to go try debugging valid code: https://github.com/urllib3/urllib3

[issue38066] Hide internal asyncio.Stream methods

2020-02-26 Thread tzickel
tzickel added the comment: The documentation needs to scrub this methods as well, for example: https://docs.python.org/3/library/asyncio-stream.html#asyncio.StreamReader.at_eof still mentions them. -- nosy: +tzickel ___ Python tracker <ht

[issue40262] SSL recv_into requires the object to implement __len__ unlike socket one

2020-04-12 Thread tzickel
New submission from tzickel : I am writing this as a bug, as I have an object which implements the buffer protocol but not the __len__. SSL's recv_into seems to require the buffer object to implement __len__, but this is unlike the socket recv_into which uses the buffer protocol length

[issue39974] A race condition with GIL releasing exists in stringlib_bytes_join

2020-03-16 Thread tzickel
tzickel added the comment: Also, semi related, (dunno where to discuss it), would a good .join() optimization be to add an optional length parameter, like .join(iterable, length=10), and when running in that code-path, it would skip all the calls to (PySequence_Fast which converts no list

[issue39974] A race condition with GIL releasing exists in stringlib_bytes_join

2020-03-16 Thread tzickel
tzickel added the comment: Also, in line: https://github.com/python/cpython/blob/d07d9f4c43bc85a77021bcc7d77643f8ebb605cf/Objects/stringlib/join.h#L85 perhaps add an if to check if the backing object is really mutable ? (Py_buffer.readonly

[issue39974] A race condition with GIL releasing exists in stringlib_bytes_join

2020-03-16 Thread tzickel
New submission from tzickel : bpo 36051 added optimization to release GIL on certain conditions of bytes joining, but it has missed a critical path. If the number of items joining is less or equal to NB_STATIC_BUFFERS (10) than static_buffers will be used to hold the buffers. https

[issue39974] A race condition with GIL releasing exists in stringlib_bytes_join

2020-03-16 Thread tzickel
Change by tzickel : -- nosy: +bmerry, inada.naoki ___ Python tracker <https://bugs.python.org/issue39974> ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue40085] Argument parsing option c should accept int between -128 to 255 ?

2020-03-27 Thread tzickel
New submission from tzickel : I converted some code from python to c-api and was surprised that a code stopped working. Basically the "c" parsing option allows for 1 char bytes or bytearray inputs and converts them to a C char. But just as indexing a bytes array returns an int,

[issue40007] An attempt to make asyncio.transport.writelines (selector) use Scatter I/O

2020-03-18 Thread tzickel
New submission from tzickel : I have a code that tries to be smart and prepare data to be chunked efficiently before sending, so I was happy to read about: https://docs.python.org/3/library/asyncio-protocol.html#asyncio.WriteTransport.writelines Only to see that it simply does: self.write(b

[issue40007] An attempt to make asyncio.transport.writelines (selector) use Scatter I/O

2020-03-19 Thread tzickel
tzickel added the comment: BTW, if wanted a much more simpler PR can be made, where writelines simply calls sendmsg on the input if no buffer exists, and if not only then concats and acts like the current code base. -- ___ Python tracker <ht

[issue39974] A race condition with GIL releasing exists in stringlib_bytes_join

2020-03-18 Thread tzickel
tzickel added the comment: Regarding getting the buffer and releasing the GIL, if it's wrong, why not fix other places in the code that do it, like: https://github.com/python/cpython/blob/611836a69a7a98bb106b4d315ed76a1e17266f4f/Modules/posixmodule.c#L9619 The GIL is released, the syscall

[issue40023] os.writev and socket.sendmsg return value are not ideal

2020-03-20 Thread tzickel
New submission from tzickel : os.writev and socket.sendmsg accept an iterable but the return value is number of bytes sent. That is not helpful as the user will have to write manual code to figure out which part of the iterable was not sent. I propose to make a version of the functions where

[issue39974] A race condition with GIL releasing exists in stringlib_bytes_join

2020-03-16 Thread tzickel
tzickel added the comment: My mistake... -- resolution: -> not a bug ___ Python tracker <https://bugs.python.org/issue39974> ___ ___ Python-bugs-list mai