From 91dcfc5dd2c6d32c2256dd7cadabc2d57f2fa6dd Mon Sep 17 00:00:00 2001
From: Jonah Williams <jonahwilliams@users.noreply.github.com>
Date: Mon, 19 Mar 2018 10:53:04 -0700
Subject: [PATCH] stderr can be null or empty string (#15701)

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

diff --git a/packages/flutter_tools/lib/src/ios/mac.dart b/packages/flutter_tools/lib/src/ios/mac.dart
index aff56675faf..fd34572ceca 100644
--- a/packages/flutter_tools/lib/src/ios/mac.dart
+++ b/packages/flutter_tools/lib/src/ios/mac.dart
@@ -158,7 +158,7 @@ class Xcode {
         // This command will error if additional components need to be installed in
         // xcode 9.2 and above.
         final ProcessResult result = processManager.runSync(<String>['/usr/bin/xcrun', 'simctl', 'list']);
-        _isSimctlInstalled = result.stderr == null;
+        _isSimctlInstalled = result.stderr == null || result.stderr == '';
       } on ProcessException {
         _isSimctlInstalled = false;
       }