[ pyopengl-Bugs-2980896 ] Creating ~8000 VBOs crashes python with PyOpenGL-accelerate

Bugs item #2980896, was opened at 2010-04-01 21:51
Message generated for change (Comment added) made by mcfletch
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Category: GL
Group: None
>Status: Closed
>Resolution: Fixed
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Mike C. Fletcher (mcfletch)
Summary: Creating ~8000 VBOs crashes python with PyOpenGL-accelerate

Initial Comment:
Allocating ~8000 VBOs causes python to exit with the message "Fatal Python error: deallocating None" when PyOpenGL-accelerate is installed.  It's easy to hit this limit with rapidly changing content, e.g. incoming experimental data.  Uninstalling PyOpenGL-accelerate avoids this crash, and the code seems to work fine in that case.  This is a reasonable workaround for the moment, but it would be nice to be able to use PyOpenGL-accelerate in the long term.  

System: Ubuntu 9.10, AMD_64, PyOpenGL 3.0.1b1, Intel X3100 graphics

Here's a minimal reproduction case:

from OpenGL.arrays import vbo
import numpy as np

data = np.arange(1000).astype(np.float32)
for i in range(1000000): 
    new_vbo = vbo.VBO(data)
    # optional: new_vbo.delete


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>Comment By: Mike C. Fletcher (mcfletch)
Date: 2010-04-03 23:19

Message:
Thanks for the bug report, the test code was perfect for finding the bug. 
The code had assumed that setting a data-pointer to None meant that it
would be a NULL pointer, in fact it merely points the pointer at Py_NONE. 
bzr head of OpenGL_accelerate has the fix and it will be released with the
next PyOpenGL release.

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https://sourceforge.net/tracker/?func=detail&atid=105988&aid=2980896&group_id=5988

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