How do I debug with Pyglet?

How to debug pyglet/opengl bus errors

• I'm using pyglet for game development, and sometimes encounter "bus errors". They are not consistently repeatable, and whenever I try to do simple debugging (eg move/remove variables, etc), the errors will eventually disappear entirely. I feel like I am encountering the notorious "heisenbug" class of errors. Intuitively, I feel like the problem is likely due to pyglet/opengl/video card interaction, but of course this is only a hunch. So my question is: how do I debug this kind of problem?

• Answer:

  The most straightforward thing to do is to run your game through a debugger. pdb is python's default debugger, but IIRC there are good alternatives, such as bpython. Once an error happens, you'll be in the python's console and be able to debug the problem. Since a "bus error" is, unless I'm not mistaken, something similar to a good old "segmentation fault", I guess you could instead somehow have it drop a core dump and analyze that, which is a less invasive method than running through a debugger... but unless you find quick and easy instruction about how to do that, I wouldn't bother.