Prevent two rare crashes

diff --git a/lottie/src/main/java/com/airbnb/lottie/animation/content/ShapeContent.java b/lottie/src/main/java/com/airbnb/lottie/animation/content/ShapeContent.java
index 4be5563..8d4c862 100644
--- a/lottie/src/main/java/com/airbnb/lottie/animation/content/ShapeContent.java
+++ b/lottie/src/main/java/com/airbnb/lottie/animation/content/ShapeContent.java

@@ -64,7 +64,13 @@
       return path;
     }
 
-    path.set(shapeAnimation.getValue());
+    Path shapeAnimationPath = shapeAnimation.getValue();
+    if (shapeAnimationPath == null) {
+      // It is unclear why this ever returns null but it seems to in rare cases.
+      // https://github.com/airbnb/lottie-android/issues/1632
+      return path;
+    }
+    path.set(shapeAnimationPath);
     path.setFillType(Path.FillType.EVEN_ODD);
 
     trimPaths.apply(path);

diff --git a/lottie/src/main/java/com/airbnb/lottie/model/layer/BaseLayer.java b/lottie/src/main/java/com/airbnb/lottie/model/layer/BaseLayer.java
index 3346395..5e7b408 100644
--- a/lottie/src/main/java/com/airbnb/lottie/model/layer/BaseLayer.java
+++ b/lottie/src/main/java/com/airbnb/lottie/model/layer/BaseLayer.java

@@ -345,6 +345,12 @@
       Mask mask = this.mask.getMasks().get(i);
       BaseKeyframeAnimation<?, Path> maskAnimation = this.mask.getMaskAnimations().get(i);
       Path maskPath = maskAnimation.getValue();
+      if (maskPath == null) {
+        // This should never happen but seems to happen occasionally.
+        // There is no known repro for this but is is probably best to just skip this mask if that is the case.
+        // https://github.com/airbnb/lottie-android/issues/1879
+        continue;
+      }
       path.set(maskPath);
       path.transform(matrix);