https://git.ruby-lang.org/ruby.git/commit/?id=0226d72e95

From 0226d72e953733759414aa3ffbecfe7eed195858 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Wed, 5 Feb 2020 09:35:29 +0900
Subject: Fixed the output from separated test in parallel test

To output to the STDOUT of the parent process according to the
parallel test protocol, should send to the `MiniTest::Unit.output`
instead of each own STDOUT.

diff --git a/tool/lib/test/unit/core_assertions.rb b/tool/lib/test/unit/core_assertions.rb
index b19c3e5..3eecf45 100644
--- a/tool/lib/test/unit/core_assertions.rb
+++ b/tool/lib/test/unit/core_assertions.rb
@@ -137,7 +137,7 @@ eom https://github.com/ruby/ruby/blob/trunk/tool/lib/test/unit/core_assertions.rb#L137
         begin
           if res_c
             res_c.close
-            print stdout
+            MiniTest::Unit.output.print stdout
             res = Marshal.load(res_p.read.unpack("m")[0])
             res_p.close
           else
-- 
cgit v0.10.2


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