[Matplotlib-users] Segmentation fault under Agg

[Mike N. <mic...@sr...>]

I've encountered a segmentation fault using the Agg backend when making 
and saving a png plot.  The segmentation fault does not seem to occur 
under different backends (e.g. Cairo).

The sequence of commands amounts to making a plot, setting the limits of 
the plot, then saving the plot as a png using savefig.  If the value of 
one of the points is too large, a segmentation fault is generated.  
Obviously the simple work-around is to not plot the out-of-bounds 
points, but the segmentation fault is probably not the desired behavior! 

Below is an example, which generates a segmentation fault on matplotlib 
versions 0.99.0 (run on OS X 10.5.8) and 0.98.5.2 (run on Fedora 11 and 
CentOS 5.3).

Can others reproduce this issue?

Thanks,
Mike Nicolls


import scipy
import matplotlib
matplotlib.use('Agg')
import pylab

if __name__ == '__main__':
    
    xdata,ydata = scipy.rand(2,10)
    xdata[3]=1.0e9  # comment out to avoid seg fault
    
    pylab.figure()
    pylab.plot(xdata,ydata,'k.')
    pylab.xlim((0.0,1.0))
    
    pylab.savefig('test.png')