From de35aef679cd4591edd53e034f0798e1aff8bdc9 Mon Sep 17 00:00:00 2001
From: Jason Simmons <jason-simmons@users.noreply.github.com>
Date: Tue, 23 Feb 2021 16:01:04 -0800
Subject: [PATCH] Check for a closed output stream in the devicelab ADB log
 reader (#76633)

---
 dev/devicelab/lib/framework/adb.dart | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/dev/devicelab/lib/framework/adb.dart b/dev/devicelab/lib/framework/adb.dart
index 4bed4c5fd94..4a60234f517 100644
--- a/dev/devicelab/lib/framework/adb.dart
+++ b/dev/devicelab/lib/framework/adb.dart
@@ -581,7 +581,9 @@ class AndroidDevice extends Device {
           .transform<String>(const LineSplitter())
           .listen((String line) {
             print('adb logcat: $line');
-            stream.sink.add(line);
+            if (!stream.isClosed) {
+              stream.sink.add(line);
+            }
           }, onDone: () { stdoutDone.complete(); });
         process.stderr
           .transform<String>(utf8.decoder)