From 9f60ceec54a8c05d198d1722c65c8a29e4c71e35 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Wed, 15 Jul 2020 23:41:37 +0900
Subject: [PATCH] Suppress bell during the test

---
 test/readline/test_readline.rb | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/test/readline/test_readline.rb b/test/readline/test_readline.rb
index db67986271..12cac20918 100644
--- a/test/readline/test_readline.rb
+++ b/test/readline/test_readline.rb
@@ -596,7 +596,14 @@ module BasetestReadline
         end
         w.write("a\t\n")
         w.flush
-        line = Readline.readline('> ', false)
+        begin
+          stderr = $stderr.dup
+          $stderr.reopen(null)
+          line = Readline.readline('> ', false)
+        ensure
+          $stderr.reopen(stderr)
+          stderr.close
+        end
       end
     end