From b65cea74295358265dfabc9e1f4d107b21e58e58 Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@gmail.com>
Date: Thu, 13 Feb 2025 18:01:20 -0800
Subject: merge revision(s) 8034e9c3d001ca3dff124ab42972684eac8af2ae: [Backport
 #20995]

	[Bug #20995] Protect `IO.popen` block from exiting by exception
---
 test/ruby/test_process.rb | 30 ++++++++++++++++++++++--------
 1 file changed, 22 insertions(+), 8 deletions(-)

(limited to 'test/ruby')

diff --git a/test/ruby/test_process.rb b/test/ruby/test_process.rb
index 6e8ba484a4..af72053234 100644
--- a/test/ruby/test_process.rb
+++ b/test/ruby/test_process.rb
@@ -922,15 +922,29 @@ class TestProcess < Test::Unit::TestCase
     }
   end
 
-  def test_popen_fork
-    IO.popen("-") {|io|
-      if !io
-        puts "fooo"
-      else
-        assert_equal("fooo\n", io.read)
+  if Process.respond_to?(:fork)
+    def test_popen_fork
+      IO.popen("-") do |io|
+        if !io
+          puts "fooo"
+        else
+          assert_equal("fooo\n", io.read)
+        end
       end
-    }
-  rescue NotImplementedError
+    end
+
+    def test_popen_fork_ensure
+      IO.popen("-") do |io|
+        if !io
+          STDERR.reopen(STDOUT)
+          raise "fooo"
+        else
+          assert_empty io.read
+        end
+      end
+    rescue RuntimeError
+      abort "[Bug #20995] should not reach here"
+    end
   end
 
   def test_fd_inheritance
-- 
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