From 7988acaa95bb6cd889820ea07c960a824b43e9eb Mon Sep 17 00:00:00 2001
From: Timothy Yung <yungsters@gmail.com>
Date: Tue, 7 Jun 2016 17:23:40 -0700
Subject: [PATCH] Improve error message for components in bad states (missing
 instance) (#6990)

---
 .../shared/stack/reconciler/ReactCompositeComponent.js     | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/renderers/shared/stack/reconciler/ReactCompositeComponent.js b/src/renderers/shared/stack/reconciler/ReactCompositeComponent.js
index 7a02c1904a7f6..75f5dc7922d20 100644
--- a/src/renderers/shared/stack/reconciler/ReactCompositeComponent.js
+++ b/src/renderers/shared/stack/reconciler/ReactCompositeComponent.js
@@ -741,6 +741,13 @@ var ReactCompositeComponentMixin = {
     nextUnmaskedContext
   ) {
     var inst = this._instance;
+    invariant(
+      inst != null,
+      'Attempted to update component `%s` that has already been unmounted ' +
+      '(or failed to mount).',
+      this.getName() || 'ReactCompositeComponent'
+    );
+
     var willReceive = false;
     var nextContext;
     var nextProps;