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Python Error Deallocating None


share|improve this answer edited Mar 8 '13 at 11:47 answered Mar 8 '13 at 6:38 Bakuriu 45.7k675121 PyNone is probably allocated statically (no python source on me to look Hoping that a nice and smooth transition is feasible :) strk pushed a commit to strk/mapnik that referenced this issue Jun 12, 2012 springmeyer Check This Out

Sign in to comment Contact GitHub API Training Shop Blog About © 2016 GitHub, Inc. the darn dos window doesn't support copying > text, and I'm a windows ignoramus): > > C:\[...]\myapp.exe > Traceback (most recent call last): > File "myapp.py", line 34, in ? > You can test this copying the example in the tutorial, adding a call to Py_DECREF(Py_None) into the Noddy_name function, build the extension and do a loop calling that method. Py_INCREF(Py_None); return Py_None; If Py_INCREF(Py_None) is omitted, what will happen? click resources


The ones in interfaceMakerPythonNative are actually OK, since those lines are generating calls into a Python function, rather than returning from a function; so it does not require upping the reference Administration User List Committer List Help Tracker Documentation Tracker Development Report Tracker Problem Issue6674 classification Title: Fatal error: deallocating None Type: crash Stage: Components: Interpreter Core Versions: Python 2.6 process Status: Fatal error after RE-installing Python 2.3.4 Fatal error - Nesting too deep Help with large data set and fatal python error ld.so.1: fatal ImportError: ld.so.1 No such file or directory fatal Files File name Uploaded Description Edit learn.py shashi, 2009-08-10 10:35 a script to make a bot learn from text files, uses another py file with text file listing.

  • I'll try to generate a simple script that recreates the error (if it still exists).Regards,Mark Top by Feanor76 » Thu Mar 08, 2007 18:39 It appears that your fix worked.
  • History Date User Action Args 2009-08-1014:34:55benjamin.petersonsetstatus: open -> closedresolution: not a bug 2009-08-1012:18:59skip.montanarosetnosy: + skip.montanaromessages: + msg91441 2009-08-1010:35:15shashicreate Website maintained by the Python community hosting by Upfront Systems / powered by
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  • i assume David can judge my findings better. ***** dbClass.cxx DCClass:get_class_def #429 return Py_None without a PY_INCREF(Py_None) DCClass::get_owner_class_de #477 return Py_None without a PY_INCREF(Py_None) ***** dcPacker.cxx DCPacker::unpack_object #804 object = Py_None

Personal Open source Business Explore Sign up Sign in Pricing Blog Support Search GitHub This repository Watch 144 Star 1,529 Fork 426 mapnik/mapnik Code Issues 488 Pull requests 41 Projects It's quick & easy. I am using python 2.7.1 and urlgrabber-3.9.1. > > What I am doing wrong? > > Regards, > > Stefan > > _______________________________________________ > Yum-devel mailing list > Yum-devel at lists.baseurl.org Python C Extension Mapnik member springmeyer commented May 18, 2012 I'll look for a moment to tag and release next week.

I don't understand the 90/10 rule? I found a bug in PythonVariable, which sometimes caused deallocating Py_None and was added in Sept 06, so it is probably what bothered you. Not the answer you're looking for? Join them; it only takes a minute: Sign up Why should Py_INCREF(Py_None) be required before returning Py_None in C?

You signed in with another tab or window. Py_decref I have fixed the problems you have noted in dcClass and dcPacker. If you don't increment the reference count, the Python interpreter will eventually discard the object after its reference count hits 0, thinking that there aren't any pointers to the object. Any hints ?


Reload to refresh your session. https://www.panda3d.org/forums/viewtopic.php?t=1967 I did some diff'ing between the August release and the current stable, but I wasn't able to come up with anything. Py_return_none It's a tough call, because what you lose in no longer having a pure python library you gain in having a self-sufficient parser and fully complilant (w/out any third-party dependency) > Py_return_none Example I don't know where the source is, but it's almost certain the problem lies there, not in the Python interpreter core.

Anyway my reasoning was correct, except that it holds for the more general case of forgetting to incref a generic object. –Bakuriu Mar 8 '13 at 10:57 add a comment| up his comment is here Hello Stephen, I've been trying to follow-up one of two options with this. The following patch seems to fix them, although I did not study the code enough to see which Py_None values were actually getting returned. SPARQLParser.c is generated from all the .bgen and .bgen.frag files. Py_buildvalue

Thanks! the darn dos window doesn't support copying text, and I'm a windows ignoramus): C:\[...]\myapp.exe Traceback (most recent call last): File "myapp.py", line 34, in ? Steve Next Message by Thread: Re: 'Fatal Python error: deallocating None' in bison sparql Thanks Drew, with these diffs, I should be able to track down the location in the grammar this contact form There are alternatives to having to remember to use Py_INCREF(Py_None): return Py_BuildValue(""); or Py_RETURN_NONE; share|improve this answer edited Mar 8 '13 at 17:28 answered Mar 8 '13 at 6:48 Jared 9,74952746

So, anybody who has such an environment could help build binaries for Windows I'm told it's a pretty fool-proof process once you have the proper build environment. Pymethoddef Post your question and get tips & solutions from a community of 418,632 IT Pros & Developers. Python will count the references to any PyObject*.

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To support this, in python, the value_converter returns Py_None, but this is a 'bare' Py_None will leak unless reference counted. Mapnik member springmeyer commented May 18, 2012 And until then pull from the unofficial PPA I maintain at https://launchpad.net/~mapnik/+archive/nightly-2.0/ dpaleino commented May 20, 2012 @springmeyer I was working right now for Briefly what I do is, select some rows from one table, do some number crunching and insert or update rows in another table. but the DECREF's in there look safe.Also, I sprinkled my code with:print sys.getrefcount(None)And the count seemed to be stable (before and after the offending ExampleTable.select call).

Discontinuity in the angle of a complex exponential signal circular figure Is Vrindavan Krishna different from Dvaraka Krishna? python c reference-counting share|improve this question asked Mar 8 '13 at 5:51 Johnny Lim 1,46031831 add a comment| 2 Answers 2 active oldest votes up vote 14 down vote accepted Missing See the README.txt in trunk/src/bison: --- from README.txt ---- This parser is implemented using the BisonGen format (see references at bottom). navigate here Would it be ok to eat rice using spoon in front of Westerners?

Is there one? Print some JSON How do I translate "hate speech"? However, after a while my > script fails without any stack trace with: "Fatal Python error: deallocating > None" > > Here is isolated python code that fails (for simplification, file:// springmeyer added a commit that closed this issue May 18, 2012 springmeyer python: fix leaky

In the general case a reference count of 0 can cause the program to fail in many different ways. Previous Message by Thread: anyone tried using py2exe on an rdflib app? Already have an account? You signed out in another tab or window.

If it's written in C or C++ check your Py_DECREF calls. What kind of bugs do "goto" statements lead to? and a fresh Python interpreter contains 500-600 references to Py_None...) Oct 26 '06 #3 This discussion thread is closed Start new discussion Replies have been disabled for this discussion. After searching a little, it seems it's one of those hard to get down to cases, so I've no idea where to look for.

Or for i in range(100000): self.orngAttr.getValueFrom(tTable[0])?Do you have time to construct a simpler script which reconstructs the bug?Thanks, Janez Top by Janez » Fri Feb 23, 2007 18:31 I may have Since Py_None is allocated statically in the Objects/object.c file: PyObject _Py_NoneStruct = { _PyObject_EXTRA_INIT 1, &PyNone_Type }; And in Include/object.h there is the define: #define Py_None (&_Py_NoneStruct) So what will happen, in any case nothing good comes from it. –Voo Mar 8 '13 at 8:05 @Voo I thought that too, and it turns out it is allocated statically(in object.c), and Hi Steve, I did this before, although I can't remember exactly what the solution was I think you have to fiddle with the setup script to make it copy all the

If None were returned in certain functions to indicate failure or something exceptional - and not a regular condition - that would explain that it doesn't fail very often. Similar topics Fatal Python error using ctypes & python exceptions Python's "only one way to do it" philosophy isn't good? Can you try executing for i in range(100000)): tTable[0][self.orngAttr]? Surely I am inflating the refcount on None, and I don't know > if that will cause a problem or overflow. > > Anyway, here's the patch, made directly to the

up vote 13 down vote favorite 3 Why should Py_INCREF(Py_None) be required before returning Py_None in C as follows? Terms Privacy Security Status Help You can't perform that action at this time. I suggest you contact the Megahal author(s).