I don't think maxdict is the problem though it may be changing how the
problem manifests itself. What is happening is that when maxdict is
used, those C++ extension objects are deleted after the first 50 math
expressions. When using a dict, they aren't deleted until closing the
application, so it just delays the problem.
All that said, I'm not sure as to the real cause of the error.
I was able to reproduce it on Windows XP with:
mpl 0.98.5, wx 2.8.10.6, python 2.5.4
however, the following seems to work:
mpl 0.98.5, wx 2.8.10.6, python 2.6.3
Are you able to update to Python 2.6? That might be one solution to the
problem.
I have to say I'm completely stumped as to the root cause of this one.
Mike
On 10/17/2009 08:44 AM, Cédrick FAURY wrote:
> Hello,
>
> I restate the problem :
>
> With the attached script "test_mathtext_wx.py" :
> 50 functions (line 31) : the 50 bitmaps are generated correctly, by
> when I close the application an error appears in the console :
>
> Assertion failed: ob_refcnt == 0, file CXX\cxx_extensions.cxx, line 1128
> This application has requested the Runtime to terminate it in an
> unusual way.
> Please contact the application's support team for more information.
>
> 250 functions : the window never appears and the crash occurs (same
> message)
>
>
> However, if in mathtext.py (mpl 0.98.5 win32 py2.5) line 2765 in
> MathTextParser, I put "self._cache = dict()" instead of "self._cache
> = maxdict(50)", the behavior of "test_mathtext_wx.py" is significantly
> different.
> 50 functions : error on console after closing the application (no
> difference here)
> 250 functions : NO CRASH (but error after closing the application)
>
> And now, my questions :
> Is this proof that "maxdict" is the cause of the problem ?
> Is there a known way to avoid the problem?
> Can someone tell me more about maxdict ?
>
> Hoping to have been quite clear,
> Cédrick
>
>
>
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