BLD: _check_plot_works(df.plot) in test results in RuntimeError: Error building image

[yarikoptic]

While building debian package for 0.11.0+git43-g7b2eaa4, matplotlib 1.1.1~rc2-1 and while building it should use Agg backend, that is how tests are invoked

python-test%: python-install%
ifeq (,$(filter nocheck,$(DEB_BUILD_OPTIONS)))
        echo "backend : Agg" >| $(CURDIR)/build/matplotlibrc
        : # Run unittests here against installed pandas
        echo "$*" | grep -q '^3' && PY=3 || PY=$*; \
        export PYTHONPATH=`/bin/ls -d $$PWD/debian/tmp/usr/lib/python$$PY/*/`; \
        export MPLCONFIGDIR=$(CURDIR)/build HOME=$(CURDIR)/build; \
        cd build/; python$* /usr/bin/nosetests -s -v -a '!network' $(EXCLUDE_TESTS$*) pandas;
else
        : # Skip unittests due to nocheck
endif

and here is a prototypical error (there is more for other invocations for the _check):

======================================================================
ERROR: test_line_plot_period_frame (pandas.tseries.tests.test_plotting.TestTSPlot)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/yoh/deb/gits/pkg-exppsy/build-area/pandas-0.11.0+git43-g7b2eaa4/debian/tmp/usr/lib/python2.7/dist-packages/pandas/tseries/tests/test_plotting.py", line 165, in test_line_plot_period_frame
    _check_plot_works(df.plot, df.index.freq)
  File "/home/yoh/deb/gits/pkg-exppsy/build-area/pandas-0.11.0+git43-g7b2eaa4/debian/tmp/usr/lib/python2.7/dist-packages/pandas/tseries/tests/test_plotting.py", line 1006, in _check_plot_works
    plt.savefig(path)
  File "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 471, in savefig
    return fig.savefig(*args, **kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/figure.py", line 1185, in savefig
    self.canvas.print_figure(*args, **kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/backend_bases.py", line 2021, in print_figure
    **kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/backends/backend_agg.py", line 477, in print_png
    filename_or_obj, self.figure.dpi)
RuntimeError: Error building image

[jreback]

this still happens with the 0.12 repo?

0.11.0+git43-g7b2eaa4,

[yarikoptic]

sorry for initial misleading version -- it was 0.12 -- treeish 7b2eaa4 . This error didn't happen though whenever I upgraded to bs4 4.2.1 (See #4214) -- which is strange . because it is not related, is it?

[cpcloud]

bs4 has nothing to do with matplotlib so it must be a version issue

[cpcloud]

since you upgraded bs4 at the same time as you fixed the version that's probably what fixed the issue

[jreback]

@yarikoptic give a run on latest master....cross fingers all errors fixed

[cpcloud]

@yarikoptic any news on this front?

[cpcloud]

@yarikoptic could this be a libpng issue? found an old sage ticket ...

http://trac.sagemath.org/sage_trac/ticket/9529

[yarikoptic]

it looks like it was some intermittent (or somehow addressed later) issue -- it did not replicate later on

$> grep test_line_plot_period_frame pandas_0.1[12]*_amd64.build         
pandas_0.11.0-2_amd64.build:test_line_plot_period_frame (pandas.tseries.tests.test_plotting.TestTSPlot) ... ok
pandas_0.11.0+git43-g7b2eaa4-1_amd64.build:test_line_plot_period_frame (pandas.tseries.tests.test_plotting.TestTSPlot) ... libpng error: Write Error
pandas_0.11.0+git43-g7b2eaa4-1_amd64.build:ERROR: test_line_plot_period_frame (pandas.tseries.tests.test_plotting.TestTSPlot)
pandas_0.11.0+git43-g7b2eaa4-1_amd64.build:  File "/home/yoh/deb/gits/pkg-exppsy/build-area/pandas-0.11.0+git43-g7b2eaa4/debian/tmp/usr/lib/python2.7/dist-packages/pandas/tseries/tests/test_plotting.py", line 165, in test_line_plot_period_frame
pandas_0.12.0~rc1+git101-gd070a1f-1_amd64.build:test_line_plot_period_frame (pandas.tseries.tests.test_plotting.TestTSPlot) ... ok
pandas_0.12.0~rc1+git43-g7b2eaa4-1_amd64.build:test_line_plot_period_frame (pandas.tseries.tests.test_plotting.TestTSPlot) ... ok
pandas_0.12.0~rc1+git79-g50eff60-1_amd64.build:test_line_plot_period_frame (pandas.tseries.tests.test_plotting.TestTSPlot) ... ok
pandas_0.12.0~rc1+git90-g4c2d050-1_amd64.build:test_line_plot_period_frame (pandas.tseries.tests.test_plotting.TestTSPlot) ... ok

so I am closing this issue for now.

sagemath link -- thanks @cpcloud, but unfortunately it 503 Service Unavailable for me ATM :-/ so can't say. FWIW I have

ii  libpng12-0:amd64                                  1.2.49-4                      amd64                         PNG library - runtime
ii  libpng12-0:i386                                   1.2.49-4                      i386                          PNG library - runtime
un  libpng12-0-dev                                    <none>                                                      (no description available)
ii  libpng12-dev                                      1.2.49-4                      amd64                         PNG library - development
ii  libpng15-15:amd64                                 1.5.11-1                      amd64                         PNG library - runtime

[cpcloud]

@yarikoptic i'm getting that issue now too .... weird

[cpcloud]

btw, thanks very much for all of your reports! 😄

[yarikoptic]

"pleasure" is mine ;)

On Wed, 17 Jul 2013, Phillip Cloud wrote:

btw, thanks very much for all of your reports! [1]:smile:

Yaroslav O. Halchenko, Ph.D.
http://neuro.debian.net http://www.pymvpa.org http://www.fail2ban.org
Senior Research Associate, Psychological and Brain Sciences Dept.
Dartmouth College, 419 Moore Hall, Hinman Box 6207, Hanover, NH 03755
Phone: +1 (603) 646-9834 Fax: +1 (603) 646-1419
WWW: http://www.linkedin.com/in/yarik