[Bug]: ax.errorbar raises for all-nan data on matplotlib 3.6.2 #24818
Description
Bug summary
The function ax.errorbar raises a StopIteration error when yerr contains only NaN values.
Code for reproduction
import matplotlib.pyplot as plt
import numpy as np
fig, ax = plt.subplots(1, 1)
ax.errorbar([0], [0], [np.nan])Actual outcome
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "~/.local/share/virtualenvs/pipeline/lib/python3.9/site-packages/matplotlib/__init__.py", line 1423, in inner
return func(ax, *map(sanitize_sequence, args), **kwargs)
File "~.local/share/virtualenvs/pipeline/lib/python3.9/site-packages/matplotlib/axes/_axes.py", line 3488, in errorbar
yerr = _upcast_err(yerr)
File "~/.local/share/virtualenvs/pipeline/lib/python3.9/site-packages/matplotlib/axes/_axes.py", line 3470, in _upcast_err
isinstance(cbook._safe_first_finite(err), np.ndarray)
File "~/.local/share/virtualenvs/pipeline/lib/python3.9/site-packages/matplotlib/cbook/__init__.py", line 1749, in _safe_first_finite
return next(val for val in obj if safe_isfinite(val))
StopIterationExpected outcome
No crash, similar to the case where only some values are NaN.
Additional information
This happens because _upcast_err unconditionally looks for a first finite element in xerr and yerr.
Operating system
Debian
Matplotlib Version
3.6.2
Matplotlib Backend
TkAgg
Python version
3.9.2
Jupyter version
No response
Installation
pip