https://git.ruby-lang.org/ruby.git/commit/?id=ca6868a430

From ca6868a4305fa1ba8186c28a5b9acbe5e287f260 Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@g...>
Date: Wed, 19 Aug 2020 09:42:34 +0900
Subject: Do "write" to temp stdin before "reopen"


diff --git a/test/irb/test_history.rb b/test/irb/test_history.rb
index 0b3620f..f9193e5 100644
--- a/test/irb/test_history.rb
+++ b/test/irb/test_history.rb
@@ -116,14 +116,14 @@ module TestIRB https://github.com/ruby/ruby/blob/trunk/test/irb/test_history.rb#L116
         end
 
         with_temp_stdio do |stdin, stdout|
+          yield(stdin, stdout)
+          stdin.close
+          stdout.flush
           replace_stdio(stdin.path, stdout.path) do
-            yield(stdin, stdout)
-            stdin.close
             system('ruby', '-Ilib', '-Itest', '-W0', '-rirb', '-e', 'IRB.start(__FILE__)')
-            stdout.flush
-            result = stdout.read
-            stdout.close
           end
+          result = stdout.read
+          stdout.close
         end
         open(IRB.rc_file("_history"), "r") do |f|
           result_history = f.read
-- 
cgit v0.10.2


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