incorporate #16822

brunobeltran · brunobeltran · commit d5339121f4eb · 2020-03-19T02:39:28.000-07:00
diff --git a/lib/matplotlib/path.py b/lib/matplotlib/path.py
@@ -337,12 +337,11 @@ def make_compound_path(cls, *args):
         codes = np.empty(len(vertices), dtype=cls.code_type)
         i = 0
         for path in args:
-            codes = path.codes
-            if codes is None:
-                codes = np.full(len(path.vertices), Path.LINETO,
-                                dtype=Path.code_type)
-                codes[0] = Path.MOVETO  # so concatenated strokes stay separate
-            codes[i:i + len(path.codes)] = codes
+            if path.codes is None:
+                codes[i] = cls.MOVETO
+                codes[i + 1:i + len(codes)] = cls.LINETO
+            else:
+                codes[i:i + len(path.codes)] = path.codes
             i += len(path.vertices)
         # remove STOP's, since internal STOPs are a bug
         not_stop_mask = codes != cls.STOP
