From 05e95afef500ebd809a3b0e9f3004463e787d29a Mon Sep 17 00:00:00 2001
From: Luigi Rosso <luigi@rive.app>
Date: Fri, 8 Oct 2021 19:30:36 -0700
Subject: [PATCH] Fix issue #159

---
 lib/src/widgets/rive_animation.dart | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/src/widgets/rive_animation.dart b/lib/src/widgets/rive_animation.dart
index e79095d..e6440e5 100644
--- a/lib/src/widgets/rive_animation.dart
+++ b/lib/src/widgets/rive_animation.dart
@@ -100,6 +100,12 @@ class _RiveAnimationState extends State<RiveAnimation> {
 
   /// Initializes the artboard, animations, state machines and controllers
   void _init(RiveFile file) {
+    if (!mounted) {
+      /// _init is usually called asynchronously, so this is a good time to
+      /// check if the widget is still mounted. If it's not we can get out of
+      /// here early.
+      return;
+    }
     final artboard = (widget.artboard != null
             ? file.artboardByName(widget.artboard!)
             : file.mainArtboard)