On Wed, Sep 23, 2009 at 6:47 PM, Mike Nicolls <michael.nico...@sri.com> wrote:
> 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 for the report -- I can confirm this on OSX and linux on svn HEAD
I've made minor tweaks to your test case to make it deterministic::
import numpy as np
import matplotlib
matplotlib.use('Agg')
import matplotlib.pyplot as plt
xdata = np.arange(10.0)
ydata = np.arange(10.0)
xdata[3]=1.0e9 # comment out to avoid seg fault
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(xdata,ydata,'k.')
ax.set_xlim(0.0,1.0)
fig.savefig('test.png')
and added a bug report to :
https://sourceforge.net/tracker/?func=detail&aid=2865490&group_id=80706&atid=560720
Platforms confirmed w/ bug:
home:~> uname -a
Darwin Macintosh-8.local 9.8.0 Darwin Kernel Version 9.8.0: Wed Jul 15
16:55:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_I386 i386
jdhun...@uqbar:~> uname -a
Linux uqbar 2.6.27-14-generic #1 SMP Tue Jun 30 19:54:46 UTC 2009
x86_64 GNU/Linux
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