From ba1f912907994a2b7a9587ca686dbbf8f26ae532 Mon Sep 17 00:00:00 2001
From: Eric Vicenti <eric@aven.io>
Date: Thu, 19 Jul 2018 12:20:56 -0700
Subject: [PATCH] Fix leak in createNavigator

Previous descriptors had been retained because this binding caused `this.prevState` to remain referenced. This binds the component getter to null instead.
---
 packages/react-navigation/src/navigators/createNavigator.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/packages/react-navigation/src/navigators/createNavigator.js b/packages/react-navigation/src/navigators/createNavigator.js
index 525d591c..ed6e2f5a 100644
--- a/packages/react-navigation/src/navigators/createNavigator.js
+++ b/packages/react-navigation/src/navigators/createNavigator.js
@@ -36,8 +36,10 @@ function createNavigator(NavigatorView, router, navigationConfig) {
           descriptors[route.key] = prevDescriptors[route.key];
           return;
         }
-        const getComponent = () =>
-          router.getComponentForRouteName(route.routeName);
+        const getComponent = router.getComponentForRouteName.bind(
+          null,
+          route.routeName
+        );
         const childNavigation = navigation.getChildNavigation(route.key);
         const options = router.getScreenOptions(childNavigation, screenProps);
         descriptors[route.key] = {