[IPython-user] "Bus error" on Mac OS X
Fernando.Perez at colorado.edu
Wed Jun 29 11:56:33 CDT 2005
Justin C. Walker wrote:
> On Jun 29, 2005, at 09:27 , Fernando Perez wrote:
>>Hans Fangohr wrote:
>>>I have installed Python 2.3.5 using fink, and then installed
>>>ipython-0.6.15 using that. When executing ipython (from /sw/bin/
>>>it seems to start okay. However, entering any command such as "1
>>>"import math" results in a short delay and then a "Bus error"
>>>Any ideas what this could be and how to debug this further?
>>wow, not the foggiest. Can anyone enlighten me as to what a 'bus
>>error' is? I've never seen that message on a linux box.
> Generally, "Bus Error" is a catch-all term for "some sort of memory
> access problem". Depending on the platform you are running on, it
> can mean, e.g., an access (usually by pointer) to non-existent
> memory; overwriting stack or other memory; cosmic rays; ...
Got it, thanks.
> It us usually, but not always, associated with a bug in the program;
> it can also show up a problem with the hardware (e.g., bad memory),
> but that is less likely. If you see lots of these, across a bunch of
> different programs, then hardware is suspect. Otherwise, blame the
> programmer :-}
In this case, then we can blame some other programmer that's not me :) I say
that just because ipython is pure python code, with no manual memory
management. So all low-level access is actually done by the CPython VM. I
wonder if Hans is loading any C extensions himself (matplotlib, vtk, ...?)
which could be segfaulting. Barring that, I'd worry about a miscompiled
Sorry, but it seems on this one, it can't be ipython itself (though obviously
an ipython profile can load extension code: check with a naked profile to test
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