https://git.ruby-lang.org/ruby.git/commit/?id=31e2f03512

From 31e2f035121a4c07d6ea3b5eab69bc97749a022b Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Sun, 29 Dec 2019 16:12:19 +0900
Subject: [ruby/io-console] Enable only interrupt bits on `intr: true`

https://github.com/ruby/io-console/commit/baaf929041

diff --git a/ext/io/console/console.c b/ext/io/console/console.c
index ac5b6a6..3a6bb25 100644
--- a/ext/io/console/console.c
+++ b/ext/io/console/console.c
@@ -188,7 +188,7 @@ set_rawmode(conmode *t, void *arg) https://github.com/ruby/ruby/blob/trunk/ext/io/console/console.c#L188
 #endif
 #ifdef ISIG
 	if (r->intr) {
-	    t->c_iflag |= BRKINT|IXON;
+	    t->c_iflag |= BRKINT;
 	    t->c_lflag |= ISIG;
 	}
 #endif
diff --git a/test/io/console/test_io_console.rb b/test/io/console/test_io_console.rb
index d71e426..77c6dac 100644
--- a/test/io/console/test_io_console.rb
+++ b/test/io/console/test_io_console.rb
@@ -364,6 +364,11 @@ defined?(PTY) and defined?(IO.console) and TestIO_Console.class_eval do https://github.com/ruby/ruby/blob/trunk/test/io/console/test_io_console.rb#L364
         assert_ctrl("#{cc.ord}", cc, r, w)
         assert_ctrl("#{cc.ord}", cc, r, w)
       end
+      if cc = ctrl["stop"]
+        assert_ctrl("#{cc.ord}", cc, r, w)
+        assert_ctrl("#{cc.ord}", cc, r, w)
+        assert_ctrl("#{cc.ord}", cc, r, w)
+      end
     end
   end
 
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