From 077ee32ea54e7537dacb85b4d9df416ebbe9c01d Mon Sep 17 00:00:00 2001
From: Devon Carew <devoncarew@gmail.com>
Date: Tue, 19 Jan 2016 12:15:11 -0800
Subject: [PATCH] guard against npe

---
 packages/flutter_tools/lib/src/android/adb.dart | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/flutter_tools/lib/src/android/adb.dart b/packages/flutter_tools/lib/src/android/adb.dart
index a0c113dc20..883ed14e66 100644
--- a/packages/flutter_tools/lib/src/android/adb.dart
+++ b/packages/flutter_tools/lib/src/android/adb.dart
@@ -105,7 +105,7 @@ class Adb {
         });
         socket.done.then((_) => controller.close());
       },
-      onCancel: () => socket.destroy()
+      onCancel: () => socket?.destroy()
     );
 
     return controller.stream;