Merge pull request #18269 from meeseeksmachine/auto-backport-of-pr-18266-on-v3.3.x

dopplershift · web-flow · commit fe6a4331dba2 · 2020-08-15T17:27:03.000-06:00
Backport PR #18266 on branch v3.3.x (Fix Path.get_extents for empty paths.)
diff --git a/lib/matplotlib/path.py b/lib/matplotlib/path.py
@@ -600,7 +600,10 @@ def get_extents(self, transform=None, **kwargs):
                 # as can the ends of the curve
                 xys.append(curve([0, *dzeros, 1]))
             xys = np.concatenate(xys)
-        return Bbox([xys.min(axis=0), xys.max(axis=0)])
+        if len(xys):
+            return Bbox([xys.min(axis=0), xys.max(axis=0)])
+        else:
+            return Bbox.null()
 
     def intersects_path(self, other, filled=True):
         """
diff --git a/lib/matplotlib/tests/test_path.py b/lib/matplotlib/tests/test_path.py
@@ -19,6 +19,8 @@ def test_empty_closed_path():
     path = Path(np.zeros((0, 2)), closed=True)
     assert path.vertices.shape == (0, 2)
     assert path.codes is None
+    assert_array_equal(path.get_extents().extents,
+                       transforms.Bbox.null().extents)
 
 
 def test_readonly_path():
