matplotlib.image imgshow from 10.1 segfault

[yannick1974]

Hi,

Debian recently updated cairo enabling "tee surface" and "OpenGL/EGL" backend (see [1]). With this new cairo, ipython 10.1 segfaults using the autoshow feature of imgshow(). For instance, launching "ipython --pylab" and executing:

import matplotlib.pyplot as plt
import matplotlib.image as mpimg
img=mpimg.imread('/some/image')
imgplot=plt.imshow(img)

results in a segfault.

Note that using the updated cairo with ipython 10 works, as well as using ipython 10.1 with previous cairo (without "tee surface" and "OpenGL/EGL" backend).

This bug was also reported to Debian (bug #612529 see [2]).

I don't know how to trace such problems but if you explain me how to, I can do it.

Regards,

Yannick

[1] http://packages.qa.debian.org/c/cairo/news/20110208T094728Z.html
[2] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=612529

[juliantaylor]

this is a problem of the mesa driver in debian:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=365245
https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/259219

workaround:
LD_PRELOAD=/usr/lib/libstdc++.so.6 ipython

[fperez]

Closing, thanks for the info on the LD_PRELOAD solution.