From 2c50f762ce5cf84dcb1540af78a303ca36f6a941 Mon Sep 17 00:00:00 2001
From: Mike McQuaid <mike@mikemcquaid.com>
Date: Tue, 27 Sep 2016 13:54:49 +0100
Subject: [PATCH] update.sh: hide GITHUB_HEADERS missing output.

Will only happen once but could be confusing anyway.
---
 Library/Homebrew/cmd/update.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Library/Homebrew/cmd/update.sh b/Library/Homebrew/cmd/update.sh
index 03c9693e8d..54eca13765 100644
--- a/Library/Homebrew/cmd/update.sh
+++ b/Library/Homebrew/cmd/update.sh
@@ -477,7 +477,7 @@ EOS
         then
           # Only try to `git fetch` when the upstream tags have changed
           # (so the API does not return 304: unmodified).
-          GITHUB_API_ETAG="$(sed -n 's/^ETag: "\([a-f0-9]\{32\}\)".*/\1/p' ".git/GITHUB_HEADERS")"
+          GITHUB_API_ETAG="$(sed -n 's/^ETag: "\([a-f0-9]\{32\}\)".*/\1/p' ".git/GITHUB_HEADERS" 2>/dev/null)"
           GITHUB_API_ACCEPT="application/vnd.github.v3+json"
           GITHUB_API_ENDPOINT="tags"
         else
-- 
GitLab