From a6a7d988b4fe31a6f9a7662662ac8b501933446f Mon Sep 17 00:00:00 2001
From: normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 23 Nov 2018 21:38:41 +0000
Subject: [PATCH] io.c (io_fd_check_closed): prioritize cross-thread "stream
 closed"

This may fix failures from TestIO#test_recycled_fd_close because
interrupts may be missed due to TOCTOU in other places.

cf. http://ci.rvm.jp/results/trunk-nopara@silicon-docker/1475034

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65939 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 io.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/io.c b/io.c
index 7085acf467..680659e333 100644
--- a/io.c
+++ b/io.c
@@ -638,7 +638,8 @@ static void
 io_fd_check_closed(int fd)
 {
     if (fd < 0) {
-	rb_raise(rb_eIOError, closed_stream);
+        rb_thread_check_ints(); /* check for ruby_error_stream_closed */
+        rb_raise(rb_eIOError, closed_stream);
     }
 }