8.9: doc build error when _JAVA_OPTIONS is set

[Harald Schilly]

Hi, I'm trying to build the documentation for doc.sagemath.org on CoCalc.

It happens that we set some java options, and they are spit out by java when you start it.

Building dochtml/manifolds tries to parse the java version somehow, but that's not going to work. I have to admit, I haven't checked for a ticket … I bet this is pretty unusual. This did work fine for 8.8. For now, I'm just unsetting this env variable.

The relevant aspect is in the very last line: there is a linebreak and then "11". Python tries to convert everything to an int 11, but it should only pick the last line.

-- Harald

Stacktrace:

[dochtml] [manifolds] /home/user/sage-git/local/lib/python2.7/site-packages/sage/manifolds/chart.py:docstring of sage.manifolds.chart.RealChart.plot:372: WARNING: Exception occurred in plotting chart-6

[dochtml] [manifolds]  from /home/user/sage-git/src/doc/en/reference/manifolds/sage/manifolds/chart.rst:
[dochtml] [manifolds] Traceback (most recent call last):
[dochtml] [manifolds]   File "/home/user/sage-git/local/lib/python2.7/site-packages/matplotlib/sphinxext/plot_directive.py", line 524, in run_code
[dochtml] [manifolds]     six.exec_(code, ns)
[dochtml] [manifolds]   File "/home/user/sage-git/local/lib/python2.7/site-packages/six.py", line 709, in exec_
[dochtml] [manifolds]     exec("""exec _code_ in _globs_, _locs_""")
[dochtml] [manifolds]   File "<string>", line 1, in <module>
[dochtml] [manifolds]   File "<string>", line 17, in <module>
[dochtml] [manifolds]   File "<string>", line 41, in sphinx_plot
[dochtml] [manifolds]   File "sage/plot/plot3d/base.pyx", line 1635, in sage.plot.plot3d.base.Graphics3d.save (build/cythonized/sage/plot/plot3d/base.c:21488)
[dochtml] [manifolds]     self.save_image(filename, **kwds)
[dochtml] [manifolds]   File "sage/plot/plot3d/base.pyx", line 1564, in sage.plot.plot3d.base.Graphics3d.save_image (build/cythonized/sage/plot/plot3d/base.c:21046)
[dochtml] [manifolds]     self._save_image_png(filename, **kwds)
[dochtml] [manifolds]   File "sage/plot/plot3d/base.pyx", line 1526, in sage.plot.plot3d.base.Graphics3d._save_image_png (build/cythonized/sage/plot/plot3d/base.c:20683)
[dochtml] [manifolds]     scene = self._rich_repr_jmol(**opts)
[dochtml] [manifolds]   File "sage/plot/plot3d/base.pyx", line 261, in sage.plot.plot3d.base.Graphics3d._rich_repr_jmol (build/cythonized/sage/plot/plot3d/base.c:7211)
[dochtml] [manifolds]     if not jdata.is_jvm_available():
[dochtml] [manifolds]   File "/home/user/sage-git/local/lib/python2.7/site-packages/sage/interfaces/jmoldata.py", line 70, in is_jvm_available

[dochtml] [manifolds]     java_version_number = int(re.sub(r'.*version "(0\.|1\.)?(\d*)[\s\S]*', r'\2', version))
[dochtml] [manifolds]     java_version_number = int(re.sub(r'.*version "(0\.|1\.)?(\d*)[\s\S]*', r'\2', version))
[dochtml] [manifolds] ValueError: invalid literal for int() with base 10: 'Picked up _JAVA_OPTIONS: -Djava.io.tmpdir=/home/user/tmp/ -Xms64m\n11'