Re: [matplotlib-devel] debugging python code

[Jochen V. <vo...@se...>]

Hello everybody,

On Wed, Dec 01, 2004 at 06:38:47PM -0800, Andrew Straw wrote:
> It sounds like you may have hit a nasty glibc bug that caused me much=20
> head scratching over the months.  Check this thread:
>=20
> http://aspn.activestate.com/ASPN/Mail/Message/numpy-discussion/2207861
>=20
> Bottom line:
>=20
> numarray does The Right Thing and attempts to set up floating point=20
> exception handling, but older versions of glibc (such as that in Debian=
=20
> sarge) have a bug whereby the floating point error bits in the SSE are=20
> not  properly cleared, leading to a SIGFPE terminating the program the=20
> next time the SSE unit is used.
Yes, this was the problem.  I applied the patch from

    http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=3D279294

and the problem disappeared.  Does this imply that on current
Debian/unstable systems matplotlib can only be used with
python-numeric and not with python-numarray?

By the way: I am still interested in my original question.  How would
I use a debugger etc. to find the problem myself in such a situation?

Many thanks,
Jochen
--=20
http://seehuhn.de/