Docs emit warnings when building #18615
Description
Describe the issue
Just a place for me to track these so that I know which are expected and which are due to my own mistakes.
Summary
On master, building the docs on the latest arch using a fresh install of Miniconda produces the following warnings
generating gallery for gallery/subplots_axes_and_figures... [ 73%] secondary_axis.py
/home/bbeltr1/developer/matplotlib/examples/subplots_axes_and_figures/secondary_axis.py:65: RuntimeWarning: divide by zero encountered in true_divide
return 1 / x
...
generating gallery for gallery/text_labels_and_annotations... [ 95%] usetex_baseline_test.py
/home/bbeltr1/.miniconda/envs/mpl/lib/python3.8/_collections_abc.py:832: MatplotlibDeprecationWarning:
The text.latex.preview rcparam was deprecated in Matplotlib 3.3 and will be removed two minor releases later.
self[key] = other[key]
/home/bbeltr1/.miniconda/envs/mpl/lib/python3.8/_collections_abc.py:832: MatplotlibDeprecationWarning:
The text.latex.preview rcparam was deprecated in Matplotlib 3.3 and will be removed two minor releases later.
self[key] = other[key]
/home/bbeltr1/.miniconda/envs/mpl/lib/python3.8/_collections_abc.py:832: MatplotlibDeprecationWarning:
The text.latex.preview rcparam was deprecated in Matplotlib 3.3 and will be removed two minor releases later.
self[key] = other[key]
...
generating gallery for gallery/animation... [100%] unchained.py
Animation size has reached 21248909 bytes, exceeding the limit of 20971520.0. If you're sure you want a larger animation embedded, set the animation.embed_limit rc parameter to a larger value (in MB). This and further frames will be dropped.
...
/home/bbeltr1/.miniconda/envs/mpl/lib/python3.8/site-packages/sphinx_gallery/scrapers.py:151: UserWarning: Plotting microsecond time intervals for dates far from the epoch (time origin: 0000-12-31T00:00:00) is not well-supported. See matplotlib.dates.set_epoch to change the epoch.
...
reading sources... [ 6%] api/_as_gen/matplotlib.axes.Axes.axvspan
<string>:6: RuntimeWarning: divide by zero encountered in true_divide
In addition, findfont fails on the following (even though I have all these fonts installed). Presumably though, this part is my own fault.
generating gallery for gallery/text_labels_and_annotations... [ 48%] fonts_demo.py
findfont: Font family ['cursive'] not found. Falling back to DejaVu Sans.
findfont: Font family ['fantasy'] not found. Falling back to DejaVu Sans.
...
generating gallery for gallery/showcase... [100%] xkcd.py
findfont: Font family ['xkcd', 'xkcd Script', 'Humor Sans', 'Comic Neue', 'Comic Sans MS'] not found. Falling back to DejaVu Sans.
...
generating gallery for tutorials/text... [ 16%] text_intro.py
findfont: Font family ['Times New Roman'] not found. Falling back to DejaVu Sans.