From 1707caf9684e062ede985bd70af904357621dd3e Mon Sep 17 00:00:00 2001
From: "L. E. Segovia" <13498015+amyspark@users.noreply.github.com>
Date: Sat, 13 Oct 2018 01:27:36 +0000
Subject: [PATCH] Cask: fix quarantine check when xattr is broken

---
 Library/Homebrew/cask/quarantine.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Library/Homebrew/cask/quarantine.rb b/Library/Homebrew/cask/quarantine.rb
index a51fbb1c28..de4675de9f 100644
--- a/Library/Homebrew/cask/quarantine.rb
+++ b/Library/Homebrew/cask/quarantine.rb
@@ -20,7 +20,7 @@ module Cask
     def check_quarantine_support
       odebug "Checking quarantine support"
 
-      if !system_command!(xattr).success?
+      if !system_command(xattr, print_stderr: false).success?
         odebug "There's not a working version of xattr."
         :xattr_broken
       elsif swift.nil?