On Tue, Mar 3, 2009 at 8:44 PM, William Stein <wst...@gmail.com> wrote: > Here is the one interesting failure I saw on the vmware Fedora Core 32-bit > box: > > sage -t "devel/sage/sage/graphs/graph_bundle.py" > libpng error: Image width or height is zero in IHDR > ********************************************************************** > File "/space/wstein/farm/sage-3.4.rc0/devel/sage/sage/graphs/graph_bundle.py", > line 163: > sage: B.plot() > Exception raised: > Traceback (most recent call last): > File "/space/wstein/farm/sage-3.4.rc0/local/bin/ncadoctest.py", > line 1231, in run_one_test > self.run_one_example(test, example, filename, compileflags) > File "/space/wstein/farm/sage-3.4.rc0/local/bin/sagedoctest.py", > line 38, in run_one_example > OrigDocTestRunner.run_one_example(self, test, example, > filename, compileflags) > File "/space/wstein/farm/sage-3.4.rc0/local/bin/ncadoctest.py", > line 1172, in run_one_example > compileflags, 1) in test.globs > File "<doctest __main__.example_5[5]>", line 1, in <module> > B.plot()###line 163: > sage: B.plot() > File "sage_object.pyx", line 98, in > sage.structure.sage_object.SageObject.__repr__ > (sage/structure/sage_object.c:1082) > File > "/space/wstein/farm/sage-3.4.rc0/local/lib/python2.5/site-packages/sage/plot/plot.py", > line 861, in _repr_ > self.show() > File > "/space/wstein/farm/sage-3.4.rc0/local/lib/python2.5/site-packages/sage/plot/plot.py", > line 1278, in show > hgridlinesstyle=hgridlinesstyle) > File > "/space/wstein/farm/sage-3.4.rc0/local/lib/python2.5/site-packages/sage/plot/plot.py", > line 1597, in save > canvas.print_figure(filename, dpi=dpi) > File > "/space/wstein/farm/sage-3.4.rc0/local/lib/python2.5/site-packages/matplotlib/backend_bases.py", > line 1453, in print_figure > **kwargs) > File > "/space/wstein/farm/sage-3.4.rc0/local/lib/python2.5/site-packages/matplotlib/backends/backend_agg.py", > line 334, in print_png > filename_or_obj, self.figure.dpi) > RuntimeError: Error building image > ********************************************************************** > 1 items had failures: > 1 of 6 in __main__.example_5 > ***Test Failed*** 1 failures. > For whitespace errors, see the file > /space/wstein/farm/sage-3.4.rc0/tmp/.doctest_graph_bundle.py > [2.0 s] > > I re-ran the doctest a few hundred times and could *not* replicate this.
I looked at this; this means that libpng noticed some problem, but I don't think you can tell what the problem is from this backtrace. (More specifically, some code somewhere in libpng called png_error(), but this could have been called from many places within libpng and we can't tell which location actually called it.) Carl --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
