From 1c202bc887eed31670bcfc4494ac850f4c74b12d Mon Sep 17 00:00:00 2001
From: David Stansby <dstansby@gmail.com>
Date: Mon, 20 May 2019 22:26:52 +0100
Subject: [PATCH] Un-mask any masked offsets

---
 lib/matplotlib/collections.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/matplotlib/collections.py b/lib/matplotlib/collections.py
index 54d867c394f5..afd54693e4e6 100644
--- a/lib/matplotlib/collections.py
+++ b/lib/matplotlib/collections.py
@@ -149,6 +149,7 @@ def __init__(self,
         self._uniform_offsets = None
         if offsets is not None:
             offsets = np.asanyarray(offsets, float)
+            offsets = np.ma.filled(offsets, 0)
             # Broadcast (2,) -> (1, 2) but nothing else.
             if offsets.shape == (2,):
                 offsets = offsets[None, :]