Test that no error is thrown when calling errorbar with all nan errors

Maxime Lucas · Maxime Lucas · commit c8435111e1b2 · 2022-12-27T12:24:12.000+01:00
diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
@@ -3981,6 +3981,12 @@ def test_errorbar_nan(fig_test, fig_ref):
     ax.errorbar([4], [3], [6], fmt="C0")
 
 
+def test_errorbar_allnan_error():
+    fig, ax = plt.subplots()
+    with pytest.warns(RuntimeWarning, match="All-NaN axis encountered"):
+        ax.errorbar([0], [0], [np.nan])
+
+
 @image_comparison(['hist_stacked_stepfilled', 'hist_stacked_stepfilled'])
 def test_hist_stacked_stepfilled():
     # make some data
