It has been failing for the past several builds, so can hardly be transient. I suspect this is the culprit:
DeprecationWarning: Old configuration for backreferences detected
using the configuration variable `mod_example_dir`
Example failed build: https://travis-ci.org/astropy/astropy/jobs/226804941
@adrn?
Wow, you actually found what is going on! I scrolled through a very similar log and had no idea what caused the problem...
Aside: it would be nice to get rid of the warnings about wrong ticksize and sampling too.
Found the culprit -- sphinx-gallery/sphinx-gallery#227 . Working on a PR (#5997).
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Wow, you actually found what is going on! I scrolled through a very similar log and had no idea what caused the problem...
Aside: it would be nice to get rid of the warnings about wrong ticksize and sampling too.