Dave Malcolm added the comment:
> Are you doing anything specific which requires this change?
No. I was looking for ways of making CPython easier to debug, and I
experimented with
this. It didn't help with debuggability as much as I hoped.
Given that CPython's performance i
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Dave Malcolm added the comment:
Attaching a probably over-simplistic attempt at this patch, against the py3k
branch.
This patch attempts to extend the replacement of
LOAD_CONST, , LOAD_CONST, BUILD_LIST, COMPARE_OP(in)
with
LOAD_CONST(tuple), COMPAREOP(in)
so that it also replaces
Dave Malcolm added the comment:
Alex: good point - thanks!
Attaching updated version of the patch (again, against py3k, likewise, I'm
somewhat new to this code, so I may have missed things)
With this:
>>> dis.dis(lambda o: o in {1,2,3})
1 0 LOAD_FAST
Dave Malcolm added the comment:
Thanks for looking at the patch.
Attached is an updated version (again against py3k) which adds tests to
Lib/test/test_peepholer.py, for both the new folding away of BUILD_SET, and for
the pre-existing folding of BUILD_LIST (which didn't seem to have
Dave Malcolm added the comment:
I'm attaching a new version of the patch, based on Oliver's (from 3 years ago).
This patch is against the py3k branch.
I've introduced a new table of (const) strings: _PyParser_TokenDescs, giving
descriptions of each token type, so t
Dave Malcolm added the comment:
Re: msg #77350:
> I propose to simply filter out init[_a-z]+ from the set of "bad"
> symbols.
I'm attaching a patch (to trunk) to Makefile.pre.in which filters out such
symbols.
Relevant part of output of "make smelly" on my s
Dave Malcolm added the comment:
Thanks for the suggestions.
Attached is a revised version of the patch.
- I believe I've fixed all tab/space issues in this version of the patch,
though I may have missed some (http://www.python.org/dev/tools/ doesn't
recommend an automated way o
New submission from Dave Baggett :
The implementation of encode and decode are slow, and scale nonlinearly
in the size of the message to be encoded/decoded.
A simple fix is to use an array.array('c') and append to it, rather
than using string concatenation. This change makes the code
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New submission from Dave Fliger :
I recently (in the last 5 days) downloaded and installed Python 2.6.x.
Upon startup of this machine I noticed a Windows warning
that "mysqld.exe could not start...". I really didn't pay attention to
it until today since I had no plans to u
Dave Baggett added the comment:
I can certainly generate a patch for you. What form would you like it
in, and against what source tree? Also, do you have a preference between
the use of array.array vs. standard arrays? (I don't know whether it's
good or bad to depend on "i
Dave Baggett added the comment:
Yes, sorry, I meant "built-in list type" not "array". Your point about
using lists this way is valid, and is why I used array.array('c').
I will do as you suggest and try all three methods. I did time the
array.array approach vs. the
Dave Fliger added the comment:
Thanks for the response. I wasn't sure what the deal was, and sort of
intuitively knew it wasn't the problem. I wouldn't have mentioned it with the
exception that uninstalling solved the problem. That's a bit odd, don't you
think?
Dave Fliger added the comment:
Thank you, sir. I'll try that later in the day. I just don't want to "break"
what I have. I'm eager to look under the hood of Python.
Â
Dave Fliger
Webmaster
Rogers Sporting Goods
1760 N. Church Road
Liberty, M
Dave Fliger added the comment:
True enough, my friend. I really didn't know if it had been reported before. If
I go over the sequence of events tat I performed here on this machine, then my
only conclusion was the installation of Python because everything worked prior
to that. I know th
Dave Baggett added the comment:
I'm not sure this causes the behavior reported here, but I believe there
really is a bug in imaplib.
In particular, it seems wrong to me that this line:
mustquote = re.compile(r"[^\w!#$%&'*+,.:;<=>?^`|~-]")
has \w in it. Should th
Dave Baggett added the comment:
OK, I missed the initial caret in the regex. The mustquote regex is
listing everything that needn't be quoted, and then negating. I still
think it's wrong, though. According to BNF given in the Formal Syntax
section of RFC 3501, you must must quote ato
Dave Abrahams added the comment:
New data point: in some contexts on Windows (not sure of the exact cause but I
was dealing with multiple drives), even this workaround isn't enough. I ended
up having to do something like this (i.e. manually search the path) on win32:
New submission from Dave Abrahams :
According to the RFC, the server is allowed to send back any encoding it likes
when no Accept-Encoding header is supplied, but all the examples I can find of
urllib2.urlopen usage assume they're getting plain text back. I think it would
be better to i
Dave Malcolm added the comment:
Attempting to summarize IRC discussion about this.
PySys_SetArgv is used to set up sys.argv There is plenty of code which
assumes that this is a list containing at least a zeroth string element; for
example warnings.warn (see msg89688).
It seems reasonable
Dave Abrahams added the comment:
How many tests did you run? My two tests were minutes apart. I have the
feeling that this has something to do with cacheing behavior on the server.
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New submission from Dave Malcolm :
fix_itertools_imports.py fails on a "*" import
2to3 fails on this code:
from itertools import *
with a traceback:
File
"/home/david/coding/python-svn/trunk-2to3-issues/Lib/lib2to3/tests/test_fixers.py",
line 3680, in test_star
Dave Malcolm added the comment:
I'm attaching a reproducer for the test suite (though not a fix)
--
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Added file:
http://bugs.python.org/file17540/itertools_import_star_reproducer.patch
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New submission from Dave Abrahams :
[This looks like a bug report against PIP because Tarek told me distutils2
would be responsible for this kind of thing and that there was an open ticket
for it. However, I can't find any such ticket so I'm posting it here]
Not only does pip not
New submission from Dave Opstad :
The utf-32 little-endian codec works fine, but the big-endian codec is
producing incorrect results:
Python 3.1.2 (r312:79360M, Mar 24 2010, 01:33:18)
[GCC 4.0.1 (Apple Inc. build 5493)] on darwin
Type "help", "copyright", "credi
New submission from Dave Opstad :
According to the 3.1 documentation, the prototype for PyBuffer_Release is:
void PyBuffer_Release(PyObject *obj, Py_buffer *view);
However, abstract.h has this prototype:
PyAPI_FUNC(void) PyBuffer_Release(Py_buffer *view);
The documentation's referen
New submission from Dave Malcolm :
pyexpat configured with "--with-system-expat" segfaults in one selftest when
built against expat 2.0.1
SVN trunk:
$ ./configure --with-system-expat
(with expat-2.0.1)
$ make
$ ./python Lib/test/test_pyexpat.py
[snip]
test_parse_only_xml_data
Dave Malcolm added the comment:
With the attached patch all of Lib/test/test_pyexpat.py passes.
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Added file: http://bugs.python.org/file17734/fix-issue-9054.patch
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type: -> crash
versions: +Python 2.7
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Pyth
Dave Malcolm added the comment:
For reference, I'm tracking this downstream here:
https://bugzilla.redhat.com/show_bug.cgi?id=583931
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New submission from Dave Abrahams :
This project needs a home page. I want to link to it from Ryppl docs, but
anyone following a link to, e.g. the bitbucket wiki would think this project
was weak at best.
--
assignee: tarek
components: Distutils2
messages: 108390
nosy: dabrahams
Dave Abrahams added the comment:
Distutils2, sorry.
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Dave Abrahams added the comment:
Yes, I understand it's not ready for users. However, even a project in process
can benefit from having a home page, to boost awareness and link connectivity.
ATM there's no reasonably stable URL I can link to from
http://ryppl.org/technology.htm
New submission from Dave Malcolm :
Running this code (seen via
http://bugs.python.org/file10013/python-2.5.2-unicode_resize-utf16.py for issue
2620):
>>> msg = 'A'*2147483647 ; msg.decode('utf16')
leads to the python process exiting with an assertion failure:
pyth
Dave Malcolm added the comment:
Patch to remove the restriction that the fields be < INT_MAX
Tested on x86_64 on a machine with > 12GB of RAM, leads to this exception,
rather than the python process bailing out:
Traceback (most recent call last):
File "", line 1, in
Fil
Dave Malcolm added the comment:
>>> Actually, you should be able to just remove the asserts.
Aha, thanks!
Yes: #define PY_SSIZE_T_CLEAN is defined at the top of Objects/exceptions.c, so
yes, Py_VaBuildValue is redirected to _Py_VaBuildValue_SizeT, so that
PyEval_CallFunct
Dave Malcolm added the comment:
The patch has bitrotted somewhat; I've had a go at reworking it so it applies
against the latest version of trunk (r82429).
All tests pass (or are skipped) on this x86_64 Linux box --with-pydebug (Fedora
13)
There are still some TODOs in the code:
Popen
New submission from Dave Malcolm :
Having run:
prelink --undo --all
the following works OK:
OPENSSL_FORCE_FIPS_MODE=1 python -c "import hashlib; m = m = hashlib.md5();
m.update('abc')"
but the following segfaults:
OPENSSL_FORCE_FIPS_MODE=1 python -c "import s
Dave Malcolm added the comment:
Thanks
> First, is it only with 2.7 or 2.6?
I've seen this with both 2.6 tarball builds and SVN trunk; in both cases
against openssl-1.0.0-1.[
> Second, I don't really get the point of the FIPS mode. The PDF you linked to
> seems full of
Dave Malcolm added the comment:
Attached patch checks for errors in the initialization of _hashlib, and only
registers the names that are actually available.
It also contains the ssl init from the first patch.
I added a _hashlib._errors dict, containing errors, so that you can examine
them
Dave Malcolm added the comment:
Not quite ready yet:
Named methods work:
$ OPENSSL_FORCE_FIPS_MODE=1 ./python -c "import hashlib; m = hashlib.md5();
m.update('abc\n'); print m.hexdigest()"0bee89b07a248e27c83fc3d5951213c1
[15741 refs]
but lookup by name still fails:
OPENS
Dave Malcolm added the comment:
I'm attaching an updated patch which:
- adds error checking to the various places where EVP_DigestInit is called
- adds a test to test_hashlib to ensure that hashlib still works gracefully
when OPENSSL_FORCE_FIPS_MODE=1 is set in the environment
Note
Dave Malcolm added the comment:
Deciphering the output from the assertion, the stdout from gdb when running the
test was:
--- BEGIN ---
Breakpoint 1, PyObject_Print (op=42, fp=0x401cf4e0, flags=1) at
Objects/object.c:329
329 {
#3 Frame 0x81e322c, for file
/home/mike/workspace/Python-2.7
Dave Malcolm added the comment:
Thanks. The patch looks good to me, and appears to also fix issue 8482 and
issue 9163: compiler optimization across all different compilers and
configurations can somewhat arbitrarily break the ability for the debugger to
work, and skipping the test in the
Dave Malcolm added the comment:
Thanks.
Just to clarify, what's the output of:
./python -c "import sysconfig; print sysconfig.get_config_vars()['PY_CFLAGS']"
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Dave Malcolm added the comment:
Thanks for the info. The final optimization option passed to gcc is the "-O3",
so the build was done with optimization.
It's not going to be possible to determine if and when gdb will be able to work
in an optimized build across all differen
Dave Malcolm added the comment:
Oops, my bad. Patch looks good as is.
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Dave Malcolm added the comment:
Thanks.
The relevant code in setup.py is all wrapped with --pydebug:
if COMPILED_WITH_PYDEBUG or not have_usable_openssl:
All of my testing had been --with-pydebug.
Rebuilding without --with-pydebug leads to some interesting failures; as you
say, if
Dave Malcolm added the comment:
The traceback is
Traceback (most recent call last):
File "/home/antoine/cpython/27/python-gdb.py", line 1084, in to_string
return pyop.get_truncated_repr(MAX_OUTPUT_LEN)
File "/home/antoine/cpython/27/python-gdb.py", line 183, i
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Dave Malcolm added the comment:
> test_gdb fails (Unable to read information on python frame) on my i386
> computer (32 bits) with -O1 (but it doesn't with -O0). I'm using Debian
> Sid: gcc 4.4.3 and gdb 7.1.
This should be fixed now that issue 8605 is resolved: we now sk
Dave Malcolm added the comment:
This should be fixed now that issue 8605 is resolved: we now skip test_gdb if
the compiler optimization level is above -O0
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stage: -> committed/rejected
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New submission from Dave Malcolm :
(taking the liberty of adding gregory.p.smith to the "nosy" list; hope that's
OK)
This is a higher-level take on issue 9146.
Some versions of OpenSSL have a FIPS mode that can refuse the use of
non-certified hashes.
The idea is that F
Dave Malcolm added the comment:
I've filed issue 9216 to discuss this at a higher level, with an API proposal
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Dave Malcolm added the comment:
Attached is a patch against the py3k branch which implements this.
I've checked that it builds against openssl-0.9.8o.tar.gz,
openssl-1.0.0a.tar.gz, and against Fedora 12 and 13's heavily-patched
openssl-1.0.0. The bulk of my testing has been agains
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New submission from Dave Malcolm :
Modules/gcmodule.c contains various assertions which can fail due to reference
counting errors elsewhere in either python, or an extension module. These can
be difficult to track down.
In the hope of maximizing the information from crash reports, the
Dave Malcolm added the comment:
The 'u' prefix went away in Python 3, use an unadorned '' or "" for a unicode
value.
$ python3
Python 3.1.2 (r312:79147, May 25 2010, 12:21:57)
[GCC 4.4.3 20100422 (Red Hat 4.4.3-18)] on linux2
Type "help", &quo
Dave Malcolm added the comment:
py3k is much cleaner than python 2, due to the change in the module API.
Here's "make smelly"'s output on a recent py3k checkout:
nm -p libpython3.2.a | \
sed -n "/ [TDB] /s/.* //p" | grep -v "^_*Py
Dave Malcolm added the comment:
Patch to py3k which adds the "_Py" prefix to the four listed symbols.
With this, the output from "make smelly" is clean (odorless, perhaps?).
However, adding _Py does seem to go against this comment in Include/asdl.h:
/* It would be nice i
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New submission from Dave Fugate :
Using Python 2.7 (r27:82525, Jul 4 2010, 09:01:59; 32-bit Intel) on 64-bit
Windows Server 2008 R2, python.exe (interactive sessions and files) crashes
when it encounters the following snippet:
>>> import signal
>>> signal.signal(7, lambda
New submission from Dave Fugate :
The error message below should state something along the lines of "f() takes at
least 1 non-keyword argument (0 given)". Regardless, this is a regression from
2.6 which would have emitted "f() takes at least 1 argument (0 given)" which
w
Dave Fugate added the comment:
Actually CPython 2.6 emits precisely what I'd expect:
D:\rft\vsl\dlr\Languages\IronPython\Tests>26
Python 2.6.2 (r262:71605, Apr 14 2009, 22:40:02) [MSC v.1500 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or &
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New submission from Dave Malcolm :
Running 2to3 on lxml-2.2.6 failed with broken indentation.
This fragment from lxml/html/__init__.py:
> def open_http_urllib(method, url, values):
> ## FIXME: should test that it's not a relative URL or something
> try:
>f
Changes by Dave Malcolm :
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title: Bad indentation in urllib import fixer with multipe imports -> Bad
indentation in urllib import fixer with multiple imports
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Dave Malcolm added the comment:
FWIW, the patch for this that I'm currently applying to Fedora's python 2.7
rpms can be seen at:
http://cvs.fedoraproject.org/viewvc/devel/python/python-2.7rc1-ctypes-noexecmem.patch?revision=1.1&content-type=text%2Fplain&view=co
It doesn&#x
New submission from Dave Malcolm :
Attempting to compile Python 3 extension modules on GCC with
"-Wmissing-field-initializers" enabled leads to warnings from the
PyModuleDef_HEAD_INIT macro
Seen attempting to build SELinux python bindings against python 3.1 with "-W
-W
Changes by Dave Malcolm :
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title: PyModuleDef_HEAD_INIT does not explicitly initial all fields of m_base
-> PyModuleDef_HEAD_INIT does not explicitly initialize all fields of m_base
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Dave Baggett added the comment:
Piers Lauder, author of imaplib, emailed me the following comment about this
bug:
The regex for "mustquote_cre" looks bizarre, and I regret to say I can
no longer remember its genesis.
Note however, that the term CTL in the RFC definition
New submission from Dave Jones:
While attempting to diagnose something (unrelated to this issue) under python
3.6, I used the following steps to clone and build a non-root python
installation:
$ mkdir py36
$ hg clone https://hg.python.org/cpython
$ cd cpython
$ hg update 3.6
New submission from Dave Jones:
While investigating a bug report in one of my libraries
(https://github.com/waveform80/picamera/issues/355) I've come across a
behaviour that appears in Python 3.6 but not prior versions. Specifically,
calling super() in a sub-class of a ctypes scalar
Dave Jones added the comment:
I confess I'm going to have to read a bit more about Python internals before I
can understand Eryk's analysis (this is my first encounter with "cell
objects"), but many thanks for the rapid analysis and patch!
I'm not too concerned abo
New submission from Dave Brondsema:
If you miss the checkbox to set the "PATH" when installing Python for the first
time, there isn't any easy way to set it again. (And for new programmers,
having it set automatically is extremely useful). Uninstalling and
re-installing d
Dave Brondsema added the comment:
A colleague has pointed out to me that this is available in the 2nd step within
"Modify". I didn't realize there were more options after the first "Modify"
screen. So perhaps the UI could be improved, but t
Dave Brondsema added the comment:
Yes, exactly.
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New submission from Dave Anderson:
Downloaded https://www.python.org/ftp/python/3.6.0/Python-3.6.0.tgz
Extracted on CentOS6 with sudo tar -xf Python-3.6.0.tgz
Result:
[vagrant@developer tmp]$ ls -l Python-3.6.0
ls: cannot access Python-3.6.0/Tools: Permission denied
ls: cannot access Python
Dave Anderson added the comment:
Sorry, should have shown sudo ls -l output for 3.6:
[vagrant@developer tmp]$ sudo ls -l Python-3.6.0
total 1016
-rw-r--r-- 1 caturra games 10910 Dec 22 18:21 aclocal.m4
-rwxr-xr-x 1 caturra games 42856 Dec 22 18:21 config.guess
-rwxr-xr-x 1 caturra games
Dave Sawyer added the comment:
The revised patch says "connections" plural for true and "connection" singular
for false. How about "the connection" since the method returns a connection.
I'm wondering though about the lack of explanation or WHY for this param
Dave Sawyer added the comment:
The user probably has a recent enough version. This is guaranteed on Windows
since Python bundles 3.6 or later. On mac or Linux it will use the version
installed on the machine. I'll make a separate patch to check the version in
sqlite3.py so it will gi
Dave Sawyer added the comment:
Changed doc to note that not only must it be used on 1 thread if true, but that
thread must be the thread that created it.
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New submission from Dave Sawyer:
The three execute methods of the connection object return the created cursor.
The term "intermediate" implies the cursor is totally handled by the execute
method, not that the user will get ownership of the object.
When the user doesn't call
Dave Sawyer added the comment:
Hi Thomas and Senthil, for the serialized setting I mentioned earlier "The
serialized mode is default on both Mac and Windows so we can probably skip
validating that. I did like mentioning the user needs to serialize the writes.
They could use one threa
New submission from Dave Sawyer:
Starting in sqlite version 3.3.1 (Jan 2006) multiple threads can share the same
connection. Python allows you do use this with the check_same_thread parameter
of sqlite3.connect() method. It's almost certain users have a late enough
version of sqlite that
Dave Sawyer added the comment:
This can go into bugfix branches. In fact, it's most likely to be helpful there
because they are more likely to be running with a version of sqlite 10 years
old. I use the sqlite3_libversion_number() call because I'm testing against the
version
Dave Sawyer added the comment:
hurray! My first commit
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Dave Sawyer added the comment:
Updated optional parameters. Fixed executescript which takes a single
parameter. The English is correct - one needs to looks at the verbs to be sure
they match in tense and number. Like "He OPENS the fridge, GRABS the milk, and
DRINKS it." This method
Dave Sawyer added the comment:
No problem. I did a pull and reposted with additional fixes suggested by
Berker and one copy/paste error I spotted.
On Sat, Jun 4, 2016 at 11:34 PM, SilentGhost wrote:
>
> SilentGhost added the comment:
>
> Thanks for the patch, Dave. For whatev
New submission from Dave Malcolm:
When running my refcount static analyzer [1] on a large corpus of real-world C
extension code for Python, I ran into the following construct in various places:
Py_XDECREF(PyObject_CallObject(callable, args));
This is bogus code: Py_XDECREF expands its
New submission from Dave Malcolm:
Within multiprocessing.connection, deliver_challenge() and
answer_challenge() use hmac for a challenge/response.
hmac implicitly defaults to using MD5.
MD5 should no longer be used for security purposes. See e.g.
http://www.kb.cert.org/vuls/id/836068
This
New submission from Dave Humphries:
os.chdir missed a back slash in rewriting a file path see example below (the
extra backslash was missing from the trunk directory).
Modifying the path with an extra slash enabled this to work for some reason.
(os windows 8 64 bit Python 2.7.3 (default, Apr
Dave Humphries added the comment:
Hi Amaury,
As I can't reopen the bug I will have to add it here (or open a new bug report).
The issue was about the string used in os.chdir() particularly.
While this is expected behaviour in a python string it is not expected
behaviour from a well formed
Dave Malcolm added the comment:
For reference, quoting PEP 3149:
>>> sysconfig.get_config_var('SO')
'.cpython-32mu.so'
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Dave Humphries added the comment:
Thanks for the thoughtful response Tim,
I am obviously not being clear with the way I express this. os.chdir
uses a common string but these strings represent a special subset of
strings. I'm not sure about mac and linux but windows has arrange of
characters
New submission from Dave Malcolm:
Does the devguide document the benchmarking suite anywhere? I can't see it
anywhere in the index on http://docs.python.org/devguide/ and google doesn't
seem to show anything.
suggested content:
* how to run the benchmarks for a Python 2 impl
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