[issue13674] crash in datetime.strftime
New submission from patrick vrijlandt patrick.vrijla...@gmail.com: This causes a crash in python 3.2.2 and 3.2, but not in 2.7.2 C:\Python32python Python 3.2 (r32:88445, Feb 20 2011, 21:29:02) [MSC v.1500 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. import datetime datetime.datetime(1899,12,31).strftime(%y) The crash happens with %y but not with %Y. The crash happens with any year 1900. On 2.7.2 a ValueError is raised because strftime requires year = 1900. This is what IMHO should happen (and would have saved me a lot of time) -- components: Library (Lib) messages: 150323 nosy: patrick.vrijlandt priority: normal severity: normal status: open title: crash in datetime.strftime type: crash versions: Python 3.2 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13674 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13671] double comma cant be parsed in config module
Łukasz Langa luk...@langa.pl added the comment: Hello, Alexander. ConfigObj is an external library. It is not maintained by the core team. You can report your issue to the ConfigObj issue tracker here: http://code.google.com/p/configobj/issues/list -- components: +None -Regular Expressions resolution: - invalid stage: - committed/rejected status: open - closed versions: -Python 2.7, Python 3.2 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13671 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13674] crash in datetime.strftime
maniram maniram maniandra...@gmail.com added the comment: This bug can not be reproduced in Python 3.2.2 on Ubuntu. Since Python 2.7.2 on your system raises a ValueError for dates below 1900 ,your system's strftime probably does not allow dates below 1900 (unlike Ubuntu). Python 3.2.2's datetime.strftime should handle this error from strftime(). -- nosy: +maniram.maniram ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13674 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9260] A finer grained import lock
Antoine Pitrou pit...@free.fr added the comment: It owns the lock, but hasn't yet updated the lock's owner (lock-tstate), so another thread calling detect_circularity() will think that this lock is available, and will proceed, which can eventually lead to a deadlock. That's true. Do you think temptatively acquiring the lock (without blocking) would solve the issue? Also, I think that locks will use POSIX semaphores on systems that support only a limited number of them (such as FreeBSD 7), and this might fail in case of nested imports (the infamous ENFILE). I'd have to double check this, though. Isn't this limit only about named semaphores? Or does it apply to anonymous semaphores as well? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9260 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12715] Add symlink support to shutil functions
Antoine Pitrou pit...@free.fr added the comment: Patch is now applied to 3.3, thank you for your patience :) -- resolution: - fixed stage: commit review - committed/rejected status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12715 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13678] way to prevent accidental variable overriding
New submission from James Hutchison jamesghutchi...@gmail.com: In python is currently there a way to elegantly throw an error if a variable is already in the current scope? For example: def longfunc(self, filename): FILE = open(filename); header = FILE.readline(); ... bunch of code ... childfiles = self.children; for child in childfiles: FILE = open(child); header = FILE.readline(); ... do something with header ... for line in FILE: ... etc ... In this case, I'm accidentally overriding the old values of FILE and header, resulting in a bug. But I'm not going to catch this. I've had a couple of real life bugs due to this that were a lot more subtle and lived for months without anyone noticing the output data was slightly wrong. This situation could be prevented if there was a way to say something along the lines of new FILE = open(child) or new header = FILE.readline() and have python throw an error to let me know that it already exists. This would also make code clearer because it allows the intended scope of a variable to become more apparent. Since new var = something is a syntax error, adding this functionality wouldn't break old code, as long as python would allow for 'new' (or whatever the keyword would end up being) to also be a variable name (like new new = 1 or new = 1) -- components: Interpreter Core messages: 150344 nosy: Jimbofbx priority: normal severity: normal status: open title: way to prevent accidental variable overriding type: enhancement versions: Python 3.2, Python 3.3, Python 3.4 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13678 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13674] crash in datetime.strftime
Tim Golden m...@timgolden.me.uk added the comment: Yes, but the MS crt strftime *for %y* requires a year = 1900 (ie tm_year = 0). Looks like we need a special check. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13674 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12715] Add symlink support to shutil functions
Antoine Pitrou pit...@free.fr added the comment: I've checked the latest patch to work fine under Windows 7 (and Linux, of course). -- stage: - commit review ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12715 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12715] Add symlink support to shutil functions
Changes by Hynek Schlawack h...@ox.cx: Added file: http://bugs.python.org/file24102/8330f2045f4d.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12715 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13675] IDLE won't open if it can't read recent-files.lst
Michael Foord mich...@voidspace.org.uk added the comment: Thanks -- resolution: - duplicate status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13675 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13673] SIGINT prevents raising of exceptions unless PyErr_CheckSignals() called
sbt shibt...@gmail.com added the comment: I have tried the same with Python 2.7.1 on Linux. The problem is the same, but one gets a partial traceback with no exception: import sys, testsigint testsigint.wait() ^CTraceback (most recent call last): File stdin, line 1, in module sys.last_value RuntimeError() Both on 2.7 and 3.3 sys.last_value gives RuntimeError(). -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13673 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12715] Add symlink support to shutil functions
Hynek Schlawack h...@ox.cx added the comment: Added new patch with protection for the remaining UF_NODUMPs in the test case. All raised issues should be fixed now. :) -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12715 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13674] crash in datetime.strftime
Changes by Florent Xicluna florent.xicl...@gmail.com: -- nosy: +belopolsky, flox, haypo versions: +Python 3.3 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13674 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13673] PyTraceBack_Print() fails if signal received but PyErr_CheckSignals() not called
Antoine Pitrou pit...@free.fr added the comment: I think calling PyErr_WriteUnraisable would be more appropriate than PyErr_Clear. I also wonder whether it's ok to ignore the exception. Pressing e.g. Ctrl-C generally shouldn't fail to stop the program, even if another exception is being processed at that moment. (of course, you could argue this is already the case when e.g. the signal is received while in a __del__) -- nosy: +amaury.forgeotdarc, pitrou stage: - patch review ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13673 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12715] Add symlink support to shutil functions
Roundup Robot devn...@psf.upfronthosting.co.za added the comment: New changeset cf57ef65bcd0 by Antoine Pitrou in branch 'default': Issue #12715: Add an optional symlinks argument to shutil functions (copyfile, copymode, copystat, copy, copy2). http://hg.python.org/cpython/rev/cf57ef65bcd0 -- nosy: +python-dev ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12715 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13674] crash in datetime.strftime
STINNER Victor victor.stin...@haypocalc.com added the comment:
timemodule.c has the following check:
#if defined(_MSC_VER) || defined(sun)
if (buf.tm_year + 1900 1 || buf.tm_year + 1900) {
PyErr_SetString(PyExc_ValueError,
strftime() requires year in [1; ]);
return NULL;
}
#endif
--
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[issue13677] correct docstring for builtin compile
New submission from Jim Jewett jimjjew...@gmail.com: The current docstring for compile suggests that the flags are strictly for selecting future statements. These are not the only flags. It also suggests that the source must be source code and the result will be bytecode, which isn't quite true. I suggest changing: The flags argument, if present, controls which future statements influence the compilation of the code. to: The flags argument, if present, largely controls which future statements influence the compilation of the code. (Additional flags are documented in the AST module.) -- assignee: docs@python components: Documentation files: bltinmodule.c.patch keywords: patch messages: 150337 nosy: Jim.Jewett, docs@python priority: normal severity: normal status: open title: correct docstring for builtin compile type: behavior Added file: http://bugs.python.org/file24105/bltinmodule.c.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13677 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13675] IDLE won't open if it can't read recent-files.lst
Roger Serwy roger.se...@gmail.com added the comment: This is a duplicate of issue4625 and was fixed. The silently failing is part of issue13582. -- nosy: +serwy ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13675 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13674] crash in datetime.strftime
Tim Golden m...@timgolden.me.uk added the comment: This is happening on Windows x86 against the current tip. The MS C runtime can handle older dates; it's just that we're taking 1900 off the year at some point. (At least, I think that's what's happening). FWIW you only need time.strftime to reproduce the error: import time time.strftime(%y, (1899, 1, 1, 0, 0, 0, 0, 0, 0)) If no-one gets there first I'll dig into the timemodule strftime wrapper. -- nosy: +tim.golden ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13674 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13673] PyTraceBack_Print() fails if signal received but PyErr_CheckSignals() not called
sbt shibt...@gmail.com added the comment: Attached is a patch for the default branch. Before calling PyFile_WriteString() the patch saves the current exception. Then it calls PyErr_CheckSignals() and clears the current exception if any. After calling PyFile_WriteString() the exception is restored. I am not sure this is an appropriate fix. -- components: +Interpreter Core keywords: +patch Added file: http://bugs.python.org/file24106/traceback_checksignals.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13673 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13674] crash in datetime.strftime
Tim Golden m...@timgolden.me.uk added the comment: ... and that's because the tm struct defines the tm_year field as an offset from 1900. Sorry for the false start. I'll look at the MS runtime stuff instead -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13674 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13676] sqlite3: Zero byte truncates string contents
New submission from Petri Lehtinen pe...@digip.org:
Inserting a string with embedded zero byte only inserts the string up to the
first zero byte:
import sqlite3
connection = sqlite3.connect(':memory:')
cursor = connection.cursor()
cursor.execute('CREATE TABLE test (value TEXT)')
cursor.execute('INSERT INTO test (value) VALUES (?)', ('foo\x00bar',))
cursor.execute('SELECT value FROM test')
print(cursor.fetchone())
# expected output: (u'foo\x00bar',)
# actual output: (u'foo',)
Also, if there's already data inserted to a table like above with embedded zero
bytes, the sqlite-API-to-Python-string conversion truncates the strings to just
before the first zero byte.
Attaching a patch against 3.3 that fixes the problem. Basically, it uses
PyUnicode_AsStringAndSize and PyUnicode_FromStringAndSize instead of the
non-size variants.
Please review, as I'm not sure it covers each possible case.
--
components: Library (Lib)
files: sqlite3_zero_byte.patch
keywords: needs review, patch
messages: 150329
nosy: ghaering, petri.lehtinen
priority: normal
severity: normal
status: open
title: sqlite3: Zero byte truncates string contents
type: behavior
versions: Python 2.7, Python 3.2, Python 3.3
Added file: http://bugs.python.org/file24104/sqlite3_zero_byte.patch
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[issue13675] IDLE won't open if it can't read recent-files.lst
New submission from Michael Foord mich...@voidspace.org.uk: Reported by a user. Reported on Windows but probably not Windows specific. If IDLE doesn't have permission to read the recent-files.lst file then it crashes. (When launched with pythonw.exe on Windows it silently fails to open with no error message to the user.) As the recent file list isn't core functionality, IDLE should be able to run without access to this file. Attached is a screenshot of the traceback when IDLE is launched from the console. -- components: IDLE files: Python problem.JPG messages: 150327 nosy: michael.foord priority: normal severity: normal stage: needs patch status: open title: IDLE won't open if it can't read recent-files.lst versions: Python 2.7, Python 3.2, Python 3.3 Added file: http://bugs.python.org/file24103/Python problem.JPG ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13675 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9260] A finer grained import lock
Charles-François Natali neolo...@free.fr added the comment: IIUC, the deadlock avoidance code just checks that acquiring a per-module lock won't create a cycle. However, I think there's a race, because the cycle detection and the lock acquisition is not atomic. For example, let's say we have a thread exactly here in in acquire_import_lock(): PyThread_acquire_lock(lock-lock, 1); /* thread inside PyEval_RestoreThread(), waiting for the GIL */ PyEval_RestoreThread(saved); lock-waiters--; } assert(lock-level == 0); lock-tstate = tstate; It owns the lock, but hasn't yet updated the lock's owner (lock-tstate), so another thread calling detect_circularity() will think that this lock is available, and will proceed, which can eventually lead to a deadlock. Also, I think that locks will use POSIX semaphores on systems that support only a limited number of them (such as FreeBSD 7), and this might fail in case of nested imports (the infamous ENFILE). I'd have to double check this, though. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9260 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13673] PyTraceBack_Print() fails if signal received but PyErr_CheckSignals() not called
sbt shibt...@gmail.com added the comment:
I think I have found the problem. PyTraceBack_Print() calls
PyFile_WriteString(), which calls PyFile_WriteObject(), which calls
PyObject_Str() which begins with
PyObject_Str(PyObject *v)
{
PyObject *res;
if (PyErr_CheckSignals())
return NULL;
...
Since PyErr_CheckSignals() returns -1, PyTraceBack_Print() fails.
(Changed title.)
--
title: SIGINT prevents raising of exceptions unless PyErr_CheckSignals() called
- PyTraceBack_Print() fails if signal received but PyErr_CheckSignals() not
called
type: - behavior
versions: +Python 2.7, Python 3.2
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[issue13678] way to prevent accidental variable overriding
Eric Snow ericsnowcurren...@gmail.com added the comment: Interesting thought, the syntax seems unnecessary. Adding new syntax to the language is something that happens rarely and only with a _lot_ of consideration. As a slightly more verbose alternative, currently you can do this: def fail_if_defined(*args, namespace): for name in args: if name in namespace: raise AlreadyBoundError(name) And in your code you would put the following where you cared about it: fail_if_defined(FILE, header, namespace=locals()) You could even drop the namespace parameter (since it's sort of boilerplate): def fail_if_defined(*args): namespace = inspect.currentframe().f_back.f_locals for name in args: if name in namespace: raise AlreadyBoundError(name) However, if you are going to the trouble of sticking those in place (or of selectively using a new syntax), you are likely paying attention to the the situation already, rendering either solution unnecessary. Ultimately, this is something better addressed instead by keeping your functions small, by being a little more cautious in naming, and particularly by careful unit testing. -- nosy: +eric.snow ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13678 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13678] way to prevent accidental variable overriding
Benjamin Peterson benja...@python.org added the comment: I think this more the domain of pylint/pyflakes. -- nosy: +benjamin.peterson resolution: - rejected status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13678 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue7719] distutils: ignore .nfsXXXX files
Zbyszek Szmek zbys...@in.waw.pl added the comment:
Review of both patches (python-2.5.1-distutils-aixnfs.patch and
dir_util.py.diff) as they are essentially the same:
I think that the test is in wrong place: we would want to ignore those .nfs*
files always, not just when checking for symlinks. A separate test
at the top of the loop would be better:
for n in names:
+ if n.startswith('.nfs'):
+ continue
src_name = os.path.join(src, n)
dst_name = os.path.join(dst, n)
if preserve_symlinks and os.path.islink(src_name):
BTW: under linux 2.6.20 I see files like: .nfs059241390036, always
of this length, with hexadecimal digits after .nfs).
--
nosy: +zbysz
versions: +Python 3.3 -3rd party, Python 3.1
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[issue13678] way to prevent accidental variable overriding
James Hutchison jamesghutchi...@gmail.com added the comment:
For starters, this would be most efficient implementation:
def unique(varname, value, scope):
assert(not varname in scope);
scope[varname] = value;
Usage:
unique('b', 1, locals());
print(b);
But you can't put that in a loop else it will false trigger. Ideally this
wouldn't false trigger. This could be done by having python internally
associate a line number with each explicit variable declaration.
Anyways, an external python function would be too slow for my use case.
Likewise, since it would be something you could use a lot, it should be
implemented in the underlying C code to give it minimal overhead.
Keeping functions small is very impractical at times. I shouldn't create 50
randomly named one use functions in my class as a safeguard against accidental
overwriting when I have a legitimately complicated piece of code that can't be
dissected without becoming unreadable. In many cases I might need 8 or 9 locals
at a time in a single line in each loop section.
I don't see how this is the area of pylint/pyflakes at all. The idea is to make
it so the human doesn't have to carefully inspect their code in order to decide
if they made a mistake or not. Inspecting a long list of warnings is no better,
and arguably I could pull up a bunch of python language design decisions and
ask why they were made if pylint/pyflakes exists.
If such a change would have be implemented after much consideration and
discussion, I don't see how closing my post helps accomplish that.
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[issue13645] import machinery vulnerable to timestamp collisions
Antoine Pitrou pit...@free.fr added the comment: Here is a patch adding the source code size to the pyc header. The number of places where details of the pyc file format are hard coded is surprisingly high... Unfortunately, I had to modify importlib's public API (path_mtime - path_stats). I find it unfortunate that importlib's API is vulnerable to pyc format changes. -- keywords: +patch title: test_import fails after test_coding - import machinery vulnerable to timestamp collisions versions: -Python 3.2 Added file: http://bugs.python.org/file24107/impsize.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13645 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13678] way to prevent accidental variable overriding
Benjamin Peterson benja...@python.org added the comment: I suggest you mail python-ideas. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13678 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13673] PyTraceBack_Print() fails if signal received but PyErr_CheckSignals() not called
sbt shibt...@gmail.com added the comment: I think calling PyErr_WriteUnraisable would be more appropriate than PyErr_Clear. You mean just adding PyErr_CheckSignals(); if (PyErr_Occurred()) PyErr_WriteUnraisable(NULL); before the call to PyFile_WriteString()? That seems to work: from testsigint import *; wait() ^CException KeyboardInterrupt ignored Traceback (most recent call last): File stdin, line 1, in module RuntimeError I also wonder whether it's ok to ignore the exception. Pressing e.g. Ctrl-C generally shouldn't fail to stop the program, even if another exception is being processed at that moment. The ignoring and clearing of exceptions also happens higher (lower?) in the call stack in print_exception() and print_exception_recursive(). For example, print_exception() ends with /* If an error happened here, don't show it. XXX This is wrong, but too many callers rely on this behavior. */ if (err != 0) PyErr_Clear(); } -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13673 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13674] crash in datetime.strftime
patrick vrijlandt patrick.vrijla...@gmail.com added the comment: Is it relevant that 2.7.2 _does_ throw a correct exception? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13674 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13676] sqlite3: Zero byte truncates string contents
Antoine Pitrou pit...@free.fr added the comment: Where are the tests? :) -- nosy: +pitrou ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13676 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13645] import machinery vulnerable to timestamp collisions
Changes by Arfrever Frehtes Taifersar Arahesis arfrever@gmail.com: -- nosy: +Arfrever ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13645 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13679] Multiprocessing system crash
New submission from Rock Achu rockac...@gmail.com: running this script repeatedly causes corruption in the console window. Just before posting this report, it led to a complete windows system freeze. running python 2.7 x86 on windows x64. The programs seems to run a couple times (when it is supposed to run once), with the output becoming more and more corrupted. One time it printed lots of triple quotes () and import os messages, even though none of those are in the script. To reproduce run the spawner.test.bat file inside the zip. Remember not to run with stuff you wont want to lose open. -- components: Windows files: issue.zip messages: 150355 nosy: Rock.Achu priority: normal severity: normal status: open title: Multiprocessing system crash type: crash versions: Python 2.7 Added file: http://bugs.python.org/file24108/issue.zip ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13679 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13679] Multiprocessing system crash
Rock Achu rockac...@gmail.com added the comment: I hit Ctrl-C right after opening the bat file and got this mess: -- Added file: http://bugs.python.org/file24109/error.txt ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13679 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13679] Multiprocessing system crash
Rock Achu rockac...@gmail.com added the comment: On a hunch opened task manager. There were over 9000 python processes open. Shocking. That was probably the cause of the system freeze. However I only had 20 threads open. Why so many processes? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13679 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13679] Multiprocessing system crash
Rock Achu rockac...@gmail.com added the comment: Or did I only have 20 threads? if the program was running in a loop, then it would have spawned 20 threads each, leading to the huge amount of processes, and probably the other issues. So why does it run so many times? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13679 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13679] Multiprocessing system crash
Rock Achu rockac...@gmail.com added the comment: Ok, using other code, I narrowed it down to this code and before: for i in xrange(10): spawner.newproc(run=True) repeating infinitely which only should set a variable (self.busy) to false -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13679 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13679] Multiprocessing system crash
Rock Achu rockac...@gmail.com added the comment: By inserting print statements and feverishly killing the process, I narrowed it down to the statement: self.thread.start() that causes the issue. which runs _M_Process.func() in a multiprocessing.Process -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13679 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13679] Multiprocessing system crash
Rock Achu rockac...@gmail.com added the comment: More clues: the function _M_Process.func isn't being called. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13679 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13679] Multiprocessing system crash
Rock Achu rockac...@gmail.com added the comment: Changing the function name and removing the argument (self) passed to func doesn't change a thing. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13679 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13679] Multiprocessing system crash
Rock Achu rockac...@gmail.com added the comment: Alright. The issue stays here. Passing nothing to multiprocessing.Process still reproduces the issue. someone else know how to deal with this? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13679 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13679] Multiprocessing system crash
Rock Achu rockac...@gmail.com added the comment: Alright. Just running: import multiprocessing thread = multiprocessing.Process() thread.start() raw_input() - Causes the crash. This time there is no output, so it is essentailly invisible. Caught me by surprise. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13679 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
